\u0110\u1ea7u ra c\u1ea3m bi\u1ebfn NPN v\u00e0 PNP: Lo\u1ea1i n\u00e0o th\u1ef1c s\u1ef1 ph\u00f9 h\u1ee3p v\u1edbi b\u1ea1n?<\/title>\n<\/head>\n<body>\n\n<div class=\"bd-post\">\n<style>\n\/* fonts: BLOG scope only \u2014 copied verbatim from the brand Standard Blog CSS Header. *\/\n@import url('https:\/\/fonts.googleapis.com\/css2?family=Manrope:wght@400;600;700&family=Roboto:wght@600;700&display=swap');\n\n.bd-post {\n \/* ---- color tokens: OMCH v4 palette (plan palette \u2014 single source of hex) ---- *\/\n --body-bg: #FFFFFF;\n --text-primary: #333333;\n --text-secondary: #6E6E6E;\n --heading-ink: #000000;\n --accent: #479DE2;\n --accent-text: #2A76B4;\n --accent-hot: #FD9649;\n --navy: #0D3972;\n --inverse-bg: #1E1E1E;\n --inverse-text: #FFFFFF;\n --inverse-text-secondary: #B0B0B0;\n --card-fill: #F4F8FC;\n --card-border: #E0E0E0;\n --divider: #C0C0C0;\n --panel-fill: #FAFAFA;\n --btn-white: #FFFFFF;\n --btn-ink: #1E1E1E;\n \/* ---- layout ---- *\/\n --prose-width: 720px;\n --gap-attach: 16px;\n --gap-normal: 32px;\n --gap-section: 48px;\n --pad-standard: 24px;\n\n font-family: \"Manrope\", sans-serif;\n font-size: 16px;\n font-weight: 400;\n line-height: 1.6;\n color: var(--text-primary);\n background: var(--body-bg);\n padding: 40px;\n max-width: 100%;\n box-sizing: border-box;\n}\n.bd-post a { overflow-wrap: anywhere; word-break: break-word; }\n.bd-post p, .bd-post li { overflow-wrap: break-word; }\n.bd-post .bd-post-article { max-width: var(--prose-width); margin: 0 auto; }\n.bd-post [class*=\"bp-\"] { box-sizing: border-box; }\n\n\/* ---- prose spacing: fixed standard ---- *\/\n.bd-post p { margin: 0 0 1em; }\n.bd-post h1 { font-family: \"Roboto\", sans-serif; font-weight: 600; font-size: 34px; line-height: 1.2; color: var(--heading-ink); margin: 0 0 16px; }\n.bd-post h2 { font-family: \"Roboto\", sans-serif; font-weight: 700; font-size: 34px; line-height: 1.2; color: var(--heading-ink); margin: 48px 0 16px; }\n.bd-post h3 { font-family: \"Roboto\", sans-serif; font-weight: 700; font-size: 24px; line-height: 1.25; color: var(--heading-ink); margin: 32px 0 12px; }\n.bd-post h4 { font-weight: 600; line-height: 1.2; margin: 24px 0 8px; }\n.bd-post ul, .bd-post ol { margin: 0 0 1em; padding-left: 1.5em; }\n.bd-post li { margin-bottom: 0.5em; }\n.bd-post li::marker { color: var(--accent-text); }\n.bd-post strong { font-weight: 700; }\n.bd-post em { font-style: italic; }\n.bd-post hr { border: 0; height: 1px; background: var(--divider); margin: 40px 0; }\n\n\/* ---- links: anchor permit-list (visual props only on content forms) ---- *\/\n.bd-post p a, .bd-post li a, .bd-post blockquote a, .bd-post td a {\n color: var(--accent-text);\n font-weight: 500;\n text-decoration: underline;\n text-decoration-color: var(--accent-text);\n text-underline-offset: 2px;\n text-decoration-thickness: 1px;\n}\n\n\/* ---- shared icon ---- *\/\n.bd-post .ico { display: inline-flex; flex: none; width: 18px; height: 18px; }\n.bd-post .ico-lg { width: 24px; height: 24px; }\n\n\/* ---- rich elements ---- *\/\n\/* Comparison tables *\/\n.bd-post .table-wrapper { overflow-x: auto; border: 1px solid var(--card-border); border-radius: 8px; margin: 0 0 1em; }\n.bd-post .rich-table-title { margin: 0 0 8px; font-family: \"Roboto\", sans-serif; font-weight: 600; font-size: 18px; color: var(--heading-ink); }\n.bd-post .rich-table { width: 100%; border-collapse: collapse; background: var(--body-bg); }\n.bd-post .rich-table th { background: var(--panel-fill); color: var(--text-primary); font-family: \"Roboto\", sans-serif; font-weight: 600; font-size: 15px; text-align: left; padding: 12px 16px; border-bottom: 2px solid var(--accent-text); white-space: nowrap; }\n.bd-post .rich-table td { color: var(--text-primary); font-size: 15px; padding: 12px 16px; border-bottom: 1px solid var(--divider); vertical-align: top; }\n.bd-post .rich-table tr:last-child td { border-bottom: 0; }\n.bd-post .rich-table tbody tr:hover td:first-child { color: var(--accent-text); }\n\n\/* Callouts (warning \/ info \/ highlight) *\/\n.bd-post .rich-callout {\n background: var(--card-fill);\n border: 1px solid var(--card-border);\n border-left: 4px solid var(--accent);\n border-radius: 0 10px 10px 0;\n padding: var(--pad-standard);\n margin: var(--gap-normal) 0;\n}\n.bd-post .rich-callout-title {\n display: block;\n font-family: \"Roboto\", sans-serif;\n font-weight: 600;\n font-size: 18px;\n color: var(--heading-ink);\n margin: 0 0 6px;\n}\n.bd-post .rich-callout-title .rich-ico { display: inline-flex; vertical-align: -0.2em; margin-right: 8px; color: var(--accent-text); width: 18px; height: 18px; }\n.bd-post .rich-callout p:last-child { margin-bottom: 0; }\n\n\/* Checklist \/ Steps cards *\/\n.bd-post .rich-card {\n background: var(--card-fill);\n border: 1px solid var(--card-border);\n border-radius: 10px;\n padding: var(--pad-standard);\n margin: var(--gap-normal) 0;\n}\n.bd-post .rich-card-title {\n display: block;\n font-family: \"Roboto\", sans-serif;\n font-weight: 600;\n font-size: 18px;\n color: var(--heading-ink);\n margin: 0 0 12px;\n}\n.bd-post .rich-card-title .rich-ico { display: inline-flex; vertical-align: -0.2em; margin-right: 8px; color: var(--accent-text); width: 18px; height: 18px; }\n.bd-post .rich-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 12px; }\n.bd-post .rich-list li { display: flex; align-items: flex-start; gap: 10px; margin: 0; }\n.bd-post .rich-list .rich-ico { color: var(--accent-text); margin-top: 2px; }\n.bd-post .rich-steps { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 14px; }\n.bd-post .rich-steps li { display: flex; align-items: flex-start; gap: 12px; margin: 0; }\n.bd-post .chip {\n display: inline-flex; align-items: center; justify-content: center;\n min-width: 24px; height: 24px; padding: 0 6px;\n background: var(--accent-text); color: var(--inverse-text);\n font-family: \"Roboto\", sans-serif; font-weight: 700; font-size: 13px;\n border-radius: 6px; flex: none;\n}\n.bd-post .rich-steps .chip { margin-top: 1px; }\n\n\/* ---- designed BPs ---- *\/\n.bd-post .bp-1-hook {\n background: var(--inverse-bg);\n border-radius: 10px;\n padding: var(--pad-standard);\n margin: var(--gap-attach) 0 var(--gap-normal);\n display: flex; align-items: flex-start; gap: 16px;\n}\n.bd-post .bp-1-icon {\n width: 44px; height: 44px; border-radius: 22px; flex: none;\n border: 1px solid var(--accent);\n display: inline-flex; align-items: center; justify-content: center;\n color: var(--accent-hot);\n}\n.bd-post .bp-1-body { display: flex; flex-direction: column; gap: 6px; min-width: 0; }\n.bd-post .bp-1-title { font-family: \"Roboto\", sans-serif; font-weight: 600; font-size: 20px; line-height: 1.3; color: var(--inverse-text); margin: 0; }\n.bd-post .bp-1-lines { font-size: 16px; color: var(--inverse-text-secondary); margin: 0; }\n\n.bd-post .bp-cta-mid {\n background: var(--card-fill);\n border: 1px solid var(--card-border);\n border-radius: 10px;\n padding: var(--pad-standard);\n margin: var(--gap-normal) 0;\n display: flex; flex-direction: column; gap: 10px; align-items: flex-start;\n}\n.bd-post .bp-cta-mid-ttl {\n display: block;\n font-family: \"Roboto\", sans-serif; font-weight: 600; font-size: 20px; color: var(--heading-ink);\n margin: 0;\n}\n.bd-post .bp-cta-mid-ttl .rich-ico { display: inline-flex; vertical-align: -0.2em; margin-right: 8px; color: var(--accent-text); width: 20px; height: 20px; }\n.bd-post .bp-cta-mid-copy { margin: 0; }\n.bd-post .bp-cta-mid-btn {\n display: inline-flex; align-items: center; gap: 8px;\n background: var(--navy); color: var(--btn-white);\n font-family: \"Roboto\", sans-serif; font-weight: 600; font-size: 15px;\n text-decoration: none; padding: 10px 20px; border-radius: 6px;\n}\n\n.bd-post .bp-3-pn {\n background: var(--card-fill);\n border: 1px solid var(--card-border);\n border-radius: 10px;\n padding: var(--pad-standard);\n margin: var(--gap-section) 0;\n}\n.bd-post .bp-3-title { display: block; font-family: \"Roboto\", sans-serif; font-weight: 600; font-size: 18px; color: var(--heading-ink); margin: 0 0 14px; }\n.bd-post .bp-3-title .rich-ico { display: inline-flex; vertical-align: -0.2em; margin-right: 8px; color: var(--accent-text); width: 18px; height: 18px; }\n.bd-post .bp-3-grid { display: grid; grid-template-columns: repeat(2, 1fr); }\n.bd-post .bp-3-cell { display: flex; align-items: flex-start; gap: 12px; padding: 4px 0; }\n.bd-post .bp-3-cell + .bp-3-cell { border-left: 1px solid var(--divider); padding-left: 20px; }\n.bd-post .bp-3-chip {\n display: inline-flex; align-items: center; justify-content: center;\n width: 40px; height: 32px; flex: none;\n background: var(--accent-text); color: var(--inverse-text);\n font-family: \"Roboto\", sans-serif; font-weight: 700; font-size: 16px;\n border-radius: 6px;\n}\n.bd-post .bp-3-cellcopy { display: flex; flex-direction: column; gap: 2px; }\n.bd-post .bp-3-celllabel { font-family: \"Roboto\", sans-serif; font-weight: 700; font-size: 15px; color: var(--heading-ink); margin: 0; }\n.bd-post .bp-3-cellsub { font-size: 14px; color: var(--text-secondary); margin: 0; }\n.bd-post .bp-3-foot { margin: 12px 0 0; font-size: 14px; color: var(--text-secondary); }\n\n.bd-post .bp-2-fault {\n background: var(--card-fill);\n border: 1px solid var(--card-border);\n border-radius: 10px;\n padding: var(--pad-standard);\n margin: var(--gap-normal) 0;\n}\n.bd-post .bp-2-title { display: block; font-family: \"Roboto\", sans-serif; font-weight: 600; font-size: 18px; color: var(--heading-ink); margin: 0 0 14px; }\n.bd-post .bp-2-title .rich-ico { display: inline-flex; vertical-align: -0.2em; margin-right: 8px; color: var(--accent-text); width: 18px; height: 18px; }\n.bd-post .bp-2-grid { display: grid; grid-template-columns: repeat(2, 1fr); }\n.bd-post .bp-2-cell { display: flex; flex-direction: column; gap: 6px; }\n.bd-post .bp-2-cell + .bp-2-cell { border-left: 1px solid var(--divider); padding-left: 20px; }\n.bd-post .bp-2-celllabel .cell-ico { display: inline-flex; vertical-align: -0.2em; margin-right: 8px; width: 20px; height: 20px; color: var(--accent-text); }\n.bd-post .bp-2-celllabel { font-family: \"Roboto\", sans-serif; font-weight: 700; font-size: 16px; color: var(--heading-ink); margin: 0; }\n.bd-post .bp-2-cellline { font-size: 15px; color: var(--text-primary); margin: 0; }\n\n.bd-post .bp-cta-end {\n background: var(--navy);\n border-radius: 10px;\n padding: var(--pad-standard);\n margin: var(--gap-section) 0;\n display: flex; flex-direction: column; gap: 10px; align-items: flex-start;\n}\n.bd-post .bp-cta-end-ttl { display: block; font-family: \"Roboto\", sans-serif; font-weight: 600; font-size: 22px; line-height: 1.3; color: var(--inverse-text); margin: 0; }\n.bd-post .bp-cta-end-ttl .rich-ico { display: inline-flex; vertical-align: -0.2em; margin-right: 8px; color: var(--accent-hot); width: 22px; height: 22px; }\n.bd-post .bp-cta-end-sub { font-size: 16px; color: var(--inverse-text-secondary); margin: 0; max-width: 34em; }\n.bd-post .bp-cta-end-btn {\n display: inline-flex; align-items: center; gap: 8px;\n background: var(--accent-hot); color: var(--btn-ink);\n font-family: \"Roboto\", sans-serif; font-weight: 600; font-size: 15px;\n text-decoration: none; padding: 10px 20px; border-radius: 6px;\n}\n\n\/* ---- sanctioned motion ---- *\/\n@media (prefers-reduced-motion: no-preference) {\n @supports (animation-timeline: view()) {\n .bd-post .bd-reveal { animation: bd-fade-in linear both; animation-timeline: view(); animation-range: entry 0% entry 35%; }\n @keyframes bd-fade-in { from { opacity: 0; } to { opacity: 1; } }\n }\n .bd-post h2 { transition: color .2s ease-out, transform .2s ease-out; }\n .bd-post h2:hover { color: var(--accent-text); transform: scale(1.01); }\n .bd-post .bd-post-article a { transition: color .2s ease-out; }\n .bd-post p a:hover, .bd-post li a:hover, .bd-post blockquote a:hover, .bd-post td a:hover { color: var(--heading-ink); }\n .bd-post .rich-card, .bd-post .rich-callout, .bd-post .bp-3-pn, .bd-post .bp-2-fault { transition: transform .2s ease-out, box-shadow .2s ease-out; }\n .bd-post .rich-card:hover, .bd-post .rich-callout:hover, .bd-post .bp-3-pn:hover, .bd-post .bp-2-fault:hover { transform: translateY(-2px); box-shadow: 0 6px 18px rgba(0,0,0,0.08); }\n .bd-post .bp-cta-mid-btn { transition: background .2s ease-out, color .2s ease-out, transform .2s ease-out, box-shadow .2s ease-out; }\n .bd-post .bp-cta-mid-btn:hover { background: var(--accent-text); color: var(--btn-white); transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,0,0,0.18); }\n .bd-post .bp-cta-end-btn { transition: background .2s ease-out, color .2s ease-out, transform .2s ease-out, box-shadow .2s ease-out; }\n .bd-post .bp-cta-end-btn:hover { background: var(--btn-white); color: var(--btn-ink); transform: translateY(-2px); box-shadow: 0 4px 14px rgba(0,0,0,0.25); }\n}\n\n\/* ---- mobile ---- *\/\n@media (max-width: 768px) {\n .bd-post { padding: 16px; }\n .bd-post h1 { font-size: 22px; }\n .bd-post h2 { font-size: 26px; margin-top: 32px; }\n .bd-post h3 { font-size: 20px; margin-top: 24px; }\n .bd-post .bp-1-title { font-size: 20px; }\n .bd-post .bp-3-grid { grid-template-columns: 1fr; }\n .bd-post .bp-3-cell + .bp-3-cell { border-left: 0; border-top: 1px solid var(--divider); padding-left: 0; padding-top: 14px; }\n .bd-post .bp-2-grid { grid-template-columns: 1fr; }\n .bd-post .bp-2-cell + .bp-2-cell { border-left: 0; border-top: 1px solid var(--divider); padding-left: 0; padding-top: 14px; }\n}\n\n\/* ---- References (canonical .bd-refs) ---- *\/\n.bd-post .bd-refs { margin: 0 0 1em; padding-left: 1.6em; }\n.bd-post .bd-refs li { font-size: 14px; line-height: 1.7; color: var(--text-secondary, #6E6E6E); margin-bottom: 10px; overflow-wrap: anywhere; }\n.bd-post .bd-refs li::marker { color: var(--accent-deep, #2A76B4); }\n.bd-post .bd-refs li a { color: var(--accent-deep, #2A76B4); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; overflow-wrap: anywhere; }\n.bd-post .bd-refs li a:hover { color: var(--heading-ink, #000000); text-decoration-thickness: 2px; }\n<\/style>\n<article class=\"bd-post-article\">\n\n<p>C\u1ea3m bi\u1ebfn thay th\u1ebf \u0111ang n\u1eb1m tr\u00ean b\u00e0n l\u00e0m vi\u1ec7c c\u1ee7a b\u1ea1n. V\u1ecf c\u1ea3m bi\u1ebfn gi\u1ed1ng h\u1ec7t, kho\u1ea3ng c\u00e1ch ph\u00e1t hi\u1ec7n c\u0169ng gi\u1ed1ng, ba s\u1ee3i d\u00e2y c\u0169ng gi\u1ed1ng \u2013 n\u00e2u, xanh d\u01b0\u01a1ng, \u0111en \u2013 nh\u01b0ng m\u00e1y v\u1eabn kh\u00f4ng nh\u1eadn di\u1ec7n \u0111\u01b0\u1ee3c n\u00f3. Trong qu\u00e1 tr\u00ecnh trao \u0111\u1ed5i v\u1ec1 \u0111\u01a1n h\u00e0ng, c\u00f3 m\u1ed9t c\u00e2u h\u1ecfi \u0111\u00e3 b\u1ecb b\u1ecf qua: <em>NPN hay PNP?<\/em><\/p>\n\n<p>\u0110\u00e2y l\u00e0 sai l\u1ea7m r\u1ebb ti\u1ec1n nh\u1ea5t trong l\u0129nh v\u1ef1c c\u1ea3m bi\u1ebfn c\u00f4ng nghi\u1ec7p, nh\u01b0ng chi ph\u00ed ph\u1ea3i tr\u1ea3 l\u1ea1i cao h\u01a1n c\u1ea3 gi\u00e1 c\u1ee7a ch\u00ednh chi\u1ebfc c\u1ea3m bi\u1ebfn. Vi\u1ec7c ch\u1ecdn sai lo\u1ea1i \u0111\u1ea7u ra s\u1ebd d\u1eabn \u0111\u1ebfn t\u00ecnh tr\u1ea1ng kh\u00f4ng c\u00f3 t\u00edn hi\u1ec7u, ph\u1ea3i thay th\u1ebb, \u0111\u1eb7t h\u00e0ng l\u1ea1i v\u00e0, n\u1ebfu kh\u00f4ng ai ph\u00e1t hi\u1ec7n k\u1ecbp th\u1eddi, quy tr\u00ecnh s\u1ea3n xu\u1ea5t s\u1ebd g\u1eb7p s\u1ef1 c\u1ed1 theo c\u00e1ch t\u1ed3i t\u1ec7 nh\u1ea5t c\u00f3 th\u1ec3. H\u01b0\u1edbng d\u1eabn n\u00e0y s\u1ebd \u0111\u1ec1 c\u1eadp \u0111\u1ebfn ba vi\u1ec7c c\u1ee5 th\u1ec3 m\u00e0 b\u1ea1n th\u1ef1c s\u1ef1 c\u1ea7n th\u1ef1c hi\u1ec7n. <strong>X\u00e1c \u0111\u1ecbnh<\/strong> lo\u1ea1i \u0111\u1ea7u ra n\u00e0o \u0111ang hi\u1ec7n ra tr\u01b0\u1edbc m\u1eaft b\u1ea1n, <strong>ch\u1ecdn<\/strong> lo\u1ea1i m\u00e0 m\u00e1y c\u1ee7a b\u1ea1n c\u1ea7n, v\u00e0 <strong>ch\u1ec9 \u0111\u1ecbnh<\/strong> \u0111\u1ec3 \u0111\u01a1n h\u00e0ng ti\u1ebfp theo \u0111\u01b0\u1ee3c giao \u0111\u00fang ngay t\u1eeb l\u1ea7n \u0111\u1ea7u ti\u00ean.<\/p>\n\n<h2>\u0110\u1ea7u ra c\u1ea3m bi\u1ebfn NPN v\u00e0 PNP l\u00e0 g\u00ec? G\u00f3c nh\u00ecn t\u1eeb m\u1ea1ch \u0111i\u1ec7n<\/h2>\n\n<p>H\u00e3y t\u1ea1m g\u00e1c l\u1ea1i v\u1ea5n \u0111\u1ec1 v\u1eadt l\u00fd c\u1ee7a b\u00f3ng b\u00e1n d\u1eabn sang m\u1ed9t b\u00ean. B\u00ean trong m\u1ed9t c\u1ea3m bi\u1ebfn DC 3 d\u00e2y, m\u1ed9t b\u00f3ng b\u00e1n d\u1eabn \u0111\u00f3ng vai tr\u00f2 nh\u01b0 m\u1ed9t <strong>c\u00f4ng t\u1eafc<\/strong>. V\u1ea5n \u0111\u1ec1 v\u1ec1 NPN\/PNP n\u00f3i chung ch\u1ec9 \u0111\u01a1n gi\u1ea3n l\u00e0 nh\u01b0 sau: <em>C\u00f4ng t\u1eafc n\u1eb1m \u1edf ph\u00eda n\u00e0o c\u1ee7a m\u1ea1ch \u0111i\u1ec7n?<\/em><\/p>\n\n<ul>\n<li>A <strong>PNP<\/strong> C\u1ea3m bi\u1ebfn k\u00edch ho\u1ea1t c\u00f4ng t\u1eafc tr\u00ean <strong>ph\u00eda cao<\/strong>: gi\u1eefa ngu\u1ed3n c\u1ea5p +24 V v\u00e0 d\u00e2y ra m\u00e0u \u0111en. Khi c\u00f3 d\u00f2ng \u0111i\u1ec7n \u0111i qua, n\u00f3 s\u1ebd \u0111\u1ea9y \u0111i\u1ec7n \u00e1p +24 V ra kh\u1ecfi d\u00e2y m\u00e0u \u0111en. D\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua <em>ra<\/em> c\u1ee7a c\u1ea3m bi\u1ebfn.<\/li>\n<li>M\u1ed9t <strong>NPN<\/strong> C\u1ea3m bi\u1ebfn k\u00edch ho\u1ea1t c\u00f4ng t\u1eafc tr\u00ean <strong>ph\u00eda d\u01b0\u1edbi<\/strong>: gi\u1eefa d\u00e2y \u0111\u1ea7u ra m\u00e0u \u0111en v\u00e0 0 V. Khi d\u1eabn \u0111i\u1ec7n, n\u00f3 s\u1ebd k\u00e9o \u0111i\u1ec7n \u00e1p c\u1ee7a d\u00e2y m\u00e0u \u0111en xu\u1ed1ng 0 V. D\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua <em>v\u00e0o<\/em> c\u1ea3m bi\u1ebfn.<\/li>\n<\/ul>\n\n<p>T\u1ea3i (\u0111\u1ea7u v\u00e0o PLC, cu\u1ed9n d\u00e2y r\u01a1le, b\u1ed9 \u0111\u1ebfm) lu\u00f4n n\u1eb1m \u1edf ph\u00eda \u0111\u1ed1i di\u1ec7n v\u1edbi c\u00f4ng t\u1eafc. \u0110\u00f3 l\u00e0 l\u00fd do t\u1ea1i sao c\u1ea3m bi\u1ebfn PNP \u201cph\u00e1t ra 24 V\u201d c\u00f2n c\u1ea3m bi\u1ebfn NPN \u201cph\u00e1t ra 0 V\u201d: m\u1ed7i lo\u1ea1i ch\u1ec9 c\u1ea7n k\u1ebft n\u1ed1i \u0111\u1ea7u ra c\u1ee7a m\u00ecnh v\u1edbi \u0111\u01b0\u1eddng ngu\u1ed3n m\u00e0 c\u00f4ng t\u1eafc c\u1ee7a n\u00f3 ti\u1ebfp x\u00fac.<\/p>\n\n\n<div class=\"bp-1-hook bd-reveal\">\n <div class=\"bp-1-icon\" aria-hidden=\"true\">\n <svg class=\"ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><circle cx=\"15\" cy=\"12\" r=\"3\"\/><rect width=\"20\" height=\"14\" x=\"2\" y=\"5\" rx=\"7\"\/><\/svg>\n <\/div>\n <div class=\"bp-1-body\">\n <p class=\"bp-1-title\">M\u1ed9t c\u00e2u gi\u1ea3i th\u00edch \u0111\u01b0\u1ee3c m\u1ecdi c\u00e2u h\u1ecfi v\u1ec1 NPN\/PNP<\/p>\n <p class=\"bp-1-lines\">Transistor PNP \u0111i\u1ec1u khi\u1ec3n c\u1ef1c d\u01b0\u01a1ng c\u1ee7a m\u1ea1ch. Transistor NPN \u0111i\u1ec1u khi\u1ec3n c\u1ef1c \u00e2m. Vi\u1ec7c \u0111o \u0111\u1ea1c, x\u1eed l\u00fd s\u1ef1 c\u1ed1 v\u00e0 l\u1ef1a ch\u1ecdn s\u1ea3n ph\u1ea9m \u0111\u1ec1u ph\u1ee5 thu\u1ed9c v\u00e0o v\u1ecb tr\u00ed l\u1eafp \u0111\u1eb7t c\u1ee7a transistor.<\/p>\n <\/div>\n<\/div>\n\n<p>\u1ede c\u1ea5p \u0111\u1ed9 n\u00e0y, b\u1ea1n ch\u1ec9 c\u1ea7n bi\u1ebft ba d\u00e2y l\u00e0 \u0111\u1ee7: <strong>m\u00e0u n\u00e2u = +24 V DC, m\u00e0u xanh d\u01b0\u01a1ng = 0 V, m\u00e0u \u0111en = \u0111\u1ea7u ra \u0111i\u1ec1u khi\u1ec3n<\/strong>. Tr\u01b0\u1edbc khi \u0111i s\u00e2u h\u01a1n, c\u1ea7n l\u00e0m r\u00f5 m\u1ed9t \u0111i\u1ec3m quan tr\u1ecdng: v\u1ea5n \u0111\u1ec1 NPN\/PNP n\u00e0y ch\u1ec9 \u00e1p d\u1ee5ng cho c\u00e1c \u0111\u1ea7u ra b\u00e1n d\u1eabn tr\u00ean c\u1ea3m bi\u1ebfn d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u (DC). C\u1ea3m bi\u1ebfn d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u (AC) hai d\u00e2y v\u00e0 c\u00e1c c\u00f4ng t\u1eafc ti\u1ebfp \u0111i\u1ec3m c\u01a1 h\u1ecdc (c\u00f4ng t\u1eafc gi\u1edbi h\u1ea1n, c\u00f4ng t\u1eafc vi m\u00f4) kh\u00f4ng ph\u00e2n bi\u1ec7t lo\u1ea1i b\u00f3ng b\u00e1n d\u1eabn \u0111\u1ea7u ra. C\u00f4ng t\u1eafc v\u1eabn ch\u1ec9 l\u00e0 c\u00f4ng t\u1eafc, v\u00e0 c\u1ee5m t\u1eeb \u201cc\u00f4ng t\u1eafc gi\u1edbi h\u1ea1n NPN\u201d l\u00e0 \u0111i\u1ec1u b\u1ea1n s\u1ebd kh\u00f4ng bao gi\u1edd c\u1ea7n ph\u1ea3i s\u1eed d\u1ee5ng.<\/p>\n\n\n<div style=\"margin:32px 0; padding:20px; background:#EAF3FB; border:1px solid #D3D3D3; border-radius:12px;\">\n <p style=\"margin:0 0 12px; font-family:'Roboto',sans-serif; font-size:18px; font-weight:700; line-height:1.35; color:#0D3972;\">\n Xem: Gi\u1ea3i th\u00edch v\u1ec1 \u0111\u1ea7u ra c\u1ee7a c\u1ea3m bi\u1ebfn PNP v\u00e0 NPN\n <\/p>\n\n <div style=\"position:relative; width:100%; aspect-ratio:16 \/ 9; overflow:hidden; border-radius:8px; background:#000;\">\n <iframe\n src=\"https:\/\/www.youtube-nocookie.com\/embed\/uTC_ZsZu84k?rel=0\"\n title=\"PNP so v\u1edbi NPN: S\u1ef1 kh\u00e1c bi\u1ec7t l\u00e0 g\u00ec?\"\n loading=\"lazy\"\n style=\"position:absolute; inset:0; width:100%; height:100%; border:0;\"\n allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\"\n referrerpolicy=\"strict-origin-when-cross-origin\"\n allowfullscreen>\n <\/iframe>\n <\/div>\n\n <p style=\"margin:12px 0 0; font-size:14px; line-height:1.5; color:#6E6E6E;\">\n M\u1ed9t l\u1eddi gi\u1ea3i th\u00edch tr\u1ef1c quan ng\u1eafn g\u1ecdn v\u1ec1 \u0111\u1ea7u ra c\u1ea3m bi\u1ebfn ki\u1ec3u ngu\u1ed3n (PNP) v\u00e0 ki\u1ec3u ch\u00ecm (NPN).\n <\/p>\n<\/div>\n\n<h2>To\u00e0n b\u1ed9 c\u00e1c lo\u1ea1i c\u1ea5u tr\u00fac \u0111\u1ea7u ra: PNP, NPN, Push-Pull v\u00e0 4 d\u00e2y<\/h2>\n\n<p>NPN v\u00e0 PNP kh\u00f4ng ph\u1ea3i l\u00e0 hai phe \u0111\u1ed1i l\u1eadp; ch\u00fang l\u00e0 hai gi\u00e1 tr\u1ecb ph\u1ed5 bi\u1ebfn nh\u1ea5t trong m\u1ed9t d\u1ea3i c\u00e1c c\u1ea5u tr\u00fac \u0111\u1ea7u ra. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 to\u00e0n b\u1ed9 d\u1ea3i \u0111\u00f3. M\u1ed9t trong nh\u1eefng h\u00e0ng \u00edt \u0111\u01b0\u1ee3c nh\u1eafc \u0111\u1ebfn nh\u1ea5t l\u1ea1i gi\u00fap m\u1ecdi ng\u01b0\u1eddi tr\u00e1nh \u0111\u01b0\u1ee3c kh\u00f4ng \u00edt r\u1eafc r\u1ed1i:<\/p>\n\n<div class=\"rich-table-wrap bd-reveal\">\n <p class=\"rich-table-title\">C\u00e1c c\u1ea5u tr\u00fac \u0111\u1ea7u ra c\u1ee7a c\u1ea3m bi\u1ebfn DC c\u00f4ng nghi\u1ec7p<\/p>\n <div class=\"table-wrapper\">\n <table class=\"rich-table\">\n <thead>\n <tr><th>Lo\u1ea1i \u0111\u1ea7u ra<\/th><th>Khi \u0111\u01b0\u1ee3c k\u00edch ho\u1ea1t, d\u00e2y m\u00e0u \u0111en<\/th><th>Ph\u00f9 h\u1ee3p v\u1edbi<\/th><th>Th\u01b0\u1eddng th\u1ea5y trong<\/th><\/tr>\n <\/thead>\n <tbody>\n <tr><td>PNP (ngu\u1ed3n c\u1ea5p, c\u00f4ng t\u1eafc ph\u00eda cao)<\/td><td>Cung c\u1ea5p \u0111i\u1ec7n \u00e1p +24 V cho t\u1ea3i<\/td><td>\u0110\u1ea7u v\u00e0o ch\u00ecm (\u0111\u1ea7u v\u00e0o chung \u1edf m\u1ee9c 0 V)<\/td><td>C\u00e1c d\u1ef1 \u00e1n x\u00e2y d\u1ef1ng m\u1edbi tr\u00ean kh\u1eafp Hoa K\u1ef3 v\u00e0 Li\u00ean minh Ch\u00e2u \u00c2u; logic t\u00edch c\u1ef1c<\/td><\/tr>\n <tr><td>NPN (lo\u1ea1i h\u00fat, c\u00f4ng t\u1eafc ph\u00eda d\u01b0\u1edbi)<\/td><td>Gi\u1ea3m \u0111i\u1ec7n \u00e1p t\u1ea3i xu\u1ed1ng 0 V<\/td><td>Ngu\u1ed3n c\u1ea5p t\u00edn hi\u1ec7u \u0111\u1ea7u v\u00e0o (th\u1ebb \u0111\u1ea7u v\u00e0o c\u00f3 \u0111i\u1ec7n \u00e1p chung l\u00e0 +24 V)<\/td><td>C\u01a1 s\u1edf ng\u01b0\u1eddi d\u00f9ng kh\u1ed5ng l\u1ed3 \u0111\u1ed1i v\u1edbi c\u00e1c m\u00e1y m\u00f3c th\u1ebf h\u1ec7 c\u0169 \u1edf ch\u00e2u \u00c1 v\u00e0 Nh\u1eadt B\u1ea3n<\/td><\/tr>\n <tr><td>\u0110\u1ea9y-k\u00e9o<\/td><td>Lu\u00e2n phi\u00ean gi\u1eefa 24 V v\u00e0 0 V; kh\u00f4ng bao gi\u1edd \u1edf tr\u1ea1ng th\u00e1i n\u1ed5i khi t\u1eaft<\/td><td>M\u1ed9t trong hai th\u1ebb \u0111\u1ea7u v\u00e0o<\/td><td>C\u00e1c \u0111\u1ea7u ra t\u1ed1c \u0111\u1ed9 cao nh\u01b0 b\u1ed9 m\u00e3 h\u00f3a<\/td><\/tr>\n <tr><td>4 d\u00e2y, \u0111\u1ea7u ra k\u00e9p<\/td><td>M\u1ed9t d\u00e2y PNP c\u1ed9ng v\u1edbi m\u1ed9t d\u00e2y NPN<\/td><td>H\u00e3y ch\u1ecdn c\u00e1i n\u00e0o ph\u00f9 h\u1ee3p v\u1edbi t\u1ea5m thi\u1ec7p<\/td><td>Hi\u1ebfm g\u1eb7p; m\u1ed9t c\u1ea3m bi\u1ebfn h\u1ed7 tr\u1ee3 c\u1ea3 hai lo\u1ea1i th\u1ebb<\/td><\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n<\/div>\n\n<p>H\u00e3y ch\u00fa \u00fd \u0111\u1ebfn c\u1ed9t gi\u1eefa: hai thu\u1eadt ng\u1eef ph\u1ed5 bi\u1ebfn nh\u1ea5t (sourcing \/ sinking) m\u00f4 t\u1ea3 <em>c\u1ee7a c\u1ea3m bi\u1ebfn<\/em> h\u00e0nh vi, v\u00e0 \u0111\u00f3 ch\u00ednh l\u00e0 \u0111i\u1ec3m khi\u1ebfn m\u1ecdi ng\u01b0\u1eddi b\u1ed1i r\u1ed1i. C\u00e1c t\u1eeb n\u00e0y s\u1ebd \u0111\u1ea3o ng\u01b0\u1ee3c khi b\u1ea1n nh\u00ecn t\u1eeb ph\u00eda th\u1ebb \u0111\u1ea7u v\u00e0o. M\u1ed9t c\u1ea3m bi\u1ebfn PNP (lo\u1ea1i c\u1ea5p ngu\u1ed3n) k\u1ebft n\u1ed1i v\u1edbi m\u1ed9t <strong>ch\u00ecm<\/strong> Th\u1ebb \u0111\u1ea7u v\u00e0o: Ch\u1ee9c n\u0103ng c\u1ee7a th\u1ebb n\u00e0y l\u00e0 cho ph\u00e9p d\u00f2ng \u0111i\u1ec7n ch\u1ea3y v\u00e0o n\u00f3. M\u1ed9t c\u1ea3m bi\u1ebfn NPN (lo\u1ea1i ch\u00ecm) \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i v\u1edbi m\u1ed9t <strong>t\u00ecm ngu\u1ed3n cung \u1ee9ng<\/strong> th\u1ebb, l\u00e0 b\u1ed9 ph\u1eadn cung c\u1ea5p d\u00f2ng \u0111i\u1ec7n cho c\u1ea3m bi\u1ebfn. C\u1ea3m bi\u1ebfn v\u00e0 th\u1ebb lu\u00f4n m\u00f4 t\u1ea3 l\u1eabn nhau theo h\u00ecnh \u1ea3nh ph\u1ea3n chi\u1ebfu. N\u1ebfu trong b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u00f3 ghi \u201c\u0111\u1ea7u v\u00e0o PNP\u201d, h\u00e3y hi\u1ec3u \u0111\u00f3 l\u00e0 \u201c\u0111\u1ea7u v\u00e0o d\u00e0nh cho c\u1ea3m bi\u1ebfn PNP\u201d v\u00e0 ki\u1ec3m tra c\u1ef1c chung, v\u00ec ch\u00ednh c\u1ef1c n\u00e0y m\u1edbi cho b\u1ea1n bi\u1ebft th\u00f4ng tin ch\u00ednh x\u00e1c.<\/p>\n\n<p>C\u00e1c \u0111\u1ea7u ra ki\u1ec3u push-pull v\u00e0 4 d\u00e2y t\u1ed3n t\u1ea1i ch\u00ednh x\u00e1c l\u00e0 v\u00ec c\u00f3 ng\u01b0\u1eddi \u0111\u00e3 ch\u00e1n ng\u1ea5y c\u00e1i g\u01b0\u01a1ng n\u00e0y. \u0110\u1ea7u ra ki\u1ec3u push-pull ch\u1ee7 \u0111\u1ed9ng \u0111i\u1ec1u khi\u1ec3n m\u1ee9c t\u00edn hi\u1ec7u tr\u00ean \u0111\u01b0\u1eddng truy\u1ec1n l\u00ean cao ho\u1eb7c xu\u1ed1ng th\u1ea5p, n\u00ean n\u00f3 ho\u1ea1t \u0111\u1ed9ng \u0111\u01b0\u1ee3c v\u1edbi c\u1ea3 hai lo\u1ea1i th\u1ebb \u0111\u1ea7u v\u00e0o; c\u00e1c c\u1ea3m bi\u1ebfn 4 d\u00e2y c\u00f3 hai b\u00f3ng b\u00e1n d\u1eabn \u0111\u1ea7u ra v\u00e0 cung c\u1ea5p cho b\u1ea1n c\u1ea3 hai t\u00edn hi\u1ec7u c\u00f9ng m\u1ed9t l\u00fac. Ch\u00fang l\u00e0 nh\u1eefng tr\u01b0\u1eddng h\u1ee3p ngo\u1ea1i l\u1ec7, kh\u00f4ng ph\u1ea3i quy t\u1eafc chung. Quy t\u1eafc chung v\u1eabn l\u00e0: <strong>Lo\u1ea1i \u0111\u1ea7u ra l\u00e0 m\u1ed9t tham s\u1ed1 m\u00e0 b\u1ea1n ph\u1ea3i \u0111\u1eb7t t\u00ean, ch\u1ee9 kh\u00f4ng ph\u1ea3i l\u00e0 th\u00f4ng tin m\u00e0 c\u1ea3m bi\u1ebfn s\u1ebd t\u1ef1 \u0111\u1ed9ng cung c\u1ea5p.<\/strong><\/p>\n\n<h2>C\u00e1ch ki\u1ec3m tra c\u1ea3m bi\u1ebfn l\u00e0 lo\u1ea1i NPN hay PNP<\/h2>\n\n<p>N\u1ebfu b\u1ea1n \u0111ang thay th\u1ebf m\u1ed9t c\u1ea3m bi\u1ebfn tr\u00ean m\u1ed9t m\u00e1y \u0111ang ho\u1ea1t \u0111\u1ed9ng (tr\u01b0\u1eddng h\u1ee3p ph\u1ed5 bi\u1ebfn nh\u1ea5t trong th\u1ef1c t\u1ebf), b\u1ea1n s\u1ebd kh\u00f4ng ch\u1ecdn lo\u1ea1i \u0111\u1ea7u ra d\u1ef1a tr\u00ean s\u1edf th\u00edch. B\u1ea1n <em>\u0111\u1ecdc d\u1eef li\u1ec7u t\u1eeb m\u00e1y<\/em>. Ch\u1ec9 c\u1ea7n hai l\u1ea7n ki\u1ec3m tra l\u00e0 xong, theo th\u1ee9 t\u1ef1 n\u00e0y.<\/p>\n\n<h3>H\u00e3y ki\u1ec3m tra th\u1ebb \u0111\u1ea7u v\u00e0o tr\u01b0\u1edbc, ch\u1ee9 kh\u00f4ng ph\u1ea3i c\u1ea3m bi\u1ebfn<\/h3>\n\n<p>Th\u1ebb \u0111\u1ea7u v\u00e0o <strong>c\u1ed5ng chung<\/strong> \u0111\u00f3 l\u00e0 th\u00f4ng tin th\u1ef1c t\u1ebf. H\u00e3y t\u00ecm t\u1ea5m m\u1ea1ch m\u00e0 d\u00e2y c\u1ea3m bi\u1ebfn c\u1ee7a b\u1ea1n n\u1ed1i v\u00e0o v\u00e0 \u0111\u1eb7t m\u1ed9t c\u00e2u h\u1ecfi: <em>C\u1ef1c chung \u0111\u01b0\u1ee3c n\u1ed1i v\u1edbi +24 V hay 0 V?<\/em><\/p>\n\n<ul>\n<li>Th\u01b0\u1eddng \u0111i k\u00e8m v\u1edbi <strong>0 V<\/strong> \u2192 Th\u1ebb n\u00e0y l\u00e0 m\u1ed9t <strong>d\u1eef li\u1ec7u \u0111\u1ea7u v\u00e0o ch\u00ecm<\/strong> \u2192 n\u00f3 mu\u1ed1n m\u1ed9t <strong>PNP<\/strong> c\u1ea3m bi\u1ebfn (c\u1ea3m bi\u1ebfn n\u00e0y cung c\u1ea5p ngu\u1ed3n \u0111i\u1ec7n 24 V c\u1ea7n thi\u1ebft \u0111\u1ec3 b\u1ed9 c\u00e1ch ly quang c\u1ee7a th\u1ebb ho\u1ea1t \u0111\u1ed9ng).<\/li>\n<li>Th\u01b0\u1eddng \u0111i k\u00e8m v\u1edbi <strong>+24 V<\/strong> \u2192 Th\u1ebb n\u00e0y l\u00e0 m\u1ed9t <strong>thu th\u1eadp th\u00f4ng tin \u0111\u1ea7u v\u00e0o<\/strong> \u2192 n\u00f3 mu\u1ed1n m\u1ed9t <strong>NPN<\/strong> c\u1ea3m bi\u1ebfn (c\u1ea3m bi\u1ebfn l\u00e0m cho \u0111\u01b0\u1eddng d\u1eabn \u0111\u1ea1t m\u1ee9c 0 V).<\/li>\n<\/ul>\n\n<p>C\u00f3 ba n\u01a1i cho th\u1ea5y \u0111i\u1ec1u n\u00e0y m\u00e0 kh\u00f4ng c\u1ea7n ph\u1ea3i \u0111o\u00e1n m\u00f2. H\u00e3y ki\u1ec3m tra s\u01a1 \u0111\u1ed3 \u0111\u1ea5u d\u00e2y in tr\u00ean bo m\u1ea1ch, nh\u00e3n tr\u00ean d\u1ea3i \u0111\u1ea7u n\u1ed1i, ho\u1eb7c ph\u1ea7n h\u01b0\u1edbng d\u1eabn \u0111\u1ea5u d\u00e2y I\/O trong s\u00e1ch h\u01b0\u1edbng d\u1eabn s\u1eed d\u1ee5ng PLC. D\u00f2ng chung th\u01b0\u1eddng \u0111\u01b0\u1ee3c in l\u00e0 \u201cCOM\u201d k\u00e8m theo t\u00ean thanh ray m\u00e0 n\u00f3 k\u1ebft n\u1ed1i. Ch\u1ec9 c\u1ea7n m\u01b0\u1eddi gi\u00e2y \u0111\u1ec3 ki\u1ec3m tra b\u1ea5t k\u1ef3 m\u1ed9t trong ba c\u00e1ch n\u00e0y l\u00e0 \u0111\u1ee7, thay v\u00ec ph\u1ea3i ph\u1ecfng \u0111o\u00e1n t\u1eeb ph\u00eda c\u1ea3m bi\u1ebfn: c\u1ea3m bi\u1ebfn kh\u00f4ng th\u1ec3 cho b\u1ea1n bi\u1ebft bo m\u1ea1ch mong \u0111\u1ee3i \u0111i\u1ec1u g\u00ec.<\/p>\n\n<h3>Ki\u1ec3m tra \u0111\u1ed3ng h\u1ed3 \u0111o: \u0110\u1ea7u ra k\u00e9o v\u1ec1 ph\u00eda \u0111\u01b0\u1eddng ray n\u00e0o?<\/h3>\n\n<p>Kh\u00f4ng c\u00f3 nh\u00e3n, kh\u00f4ng c\u00f3 s\u01a1 \u0111\u1ed3, kh\u00f4ng c\u00f3 h\u01b0\u1edbng d\u1eabn s\u1eed d\u1ee5ng. \u0110\u01b0\u1ee3c th\u00f4i. C\u1ea5p ngu\u1ed3n cho c\u1ea3m bi\u1ebfn (d\u00e2y n\u00e2u n\u1ed1i v\u1edbi +24 V, d\u00e2y xanh n\u1ed1i v\u1edbi 0 V) v\u00e0 d\u00f9ng \u0111\u1ed3ng h\u1ed3 v\u1ea1n n\u0103ng \u1edf ch\u1ebf \u0111\u1ed9 \u0111o \u0111i\u1ec7n \u00e1p m\u1ed9t chi\u1ec1u. B\u00ed quy\u1ebft l\u00e0 <strong>\u0111i\u1ec3m tham chi\u1ebfu<\/strong>:<\/p>\n\n<div class=\"rich-card bd-reveal\">\n <p class=\"rich-card-title\"><span class=\"rich-ico\" aria-hidden=\"true\"><svg class=\"ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><circle cx=\"6\" cy=\"19\" r=\"3\"\/><path d=\"M9 19h8.5a3.5 3.5 0 0 0 0-7h-11a3.5 3.5 0 0 1 0-7H15\"\/><circle cx=\"18\" cy=\"5\" r=\"3\"\/><\/svg><\/span>X\u00e1c \u0111\u1ecbnh lo\u1ea1i t\u00edn hi\u1ec7u \u0111\u1ea7u ra c\u1ee7a c\u1ea3m bi\u1ebfn b\u1eb1ng \u0111\u1ed3ng h\u1ed3 v\u1ea1n n\u0103ng<\/p>\n <ol class=\"rich-steps\">\n <li><span class=\"chip\">1<\/span><span>C\u1ea5p ngu\u1ed3n cho c\u1ea3m bi\u1ebfn (d\u00e2y n\u00e2u +24 V, d\u00e2y xanh d\u01b0\u01a1ng 0 V).<\/span><\/li>\n <li><span class=\"chip\">2<\/span><span>\u0110\u1eb7t \u0111\u1ea7u d\u00e2y \u0111en c\u1ee7a \u0111\u1ed3ng h\u1ed3 \u0111o v\u00e0o v\u1ecb tr\u00ed 0 V, \u0111\u1ea7u d\u00e2y \u0111\u1ecf v\u00e0o d\u00e2y \u0111\u1ea7u ra m\u00e0u \u0111en, r\u1ed3i k\u00edch ho\u1ea1t c\u1ea3m bi\u1ebfn. N\u1ebfu gi\u00e1 tr\u1ecb hi\u1ec3n th\u1ecb nh\u1ea3y v\u1ecdt l\u00ean \u2248 \u0111i\u1ec7n \u00e1p ngu\u1ed3n (v\u00ed d\u1ee5: 23\u201324 V), th\u00ec \u0111\u00f3 l\u00e0 lo\u1ea1i PNP.<\/span><\/li>\n <li><span class=\"chip\">3<\/span><span>Di chuy\u1ec3n \u0111\u1ea7u d\u00f2 m\u00e0u \u0111en c\u1ee7a \u0111\u1ed3ng h\u1ed3 \u0111o \u0111\u1ebfn c\u1ef1c +24 V, gi\u1eef nguy\u00ean \u0111\u1ea7u d\u00f2 m\u00e0u \u0111\u1ecf tr\u00ean d\u00e2y \u0111\u1ea7u ra, r\u1ed3i nh\u1ea5n n\u00fat k\u00edch ho\u1ea1t m\u1ed9t l\u1ea7n n\u1eefa. N\u1ebfu gi\u00e1 tr\u1ecb hi\u1ec3n th\u1ecb l\u00fac n\u00e0y gi\u1ea3m xu\u1ed1ng g\u1ea7n 0 V (\u0111\u1ea7u ra b\u1ecb k\u00e9o v\u1ec1 ph\u00eda 0 V), th\u00ec \u0111\u00f3 l\u00e0 lo\u1ea1i NPN.<\/span><\/li>\n <li><span class=\"chip\">4<\/span><span>Ch\u1ec9 c\u1ea7n xem th\u00f4ng tin tr\u00ean m\u1ed9t trong hai \u0111\u1ea7u n\u1ed1i l\u00e0 c\u00f3 th\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c lo\u1ea1i \u0111\u1ea7u ra; n\u1ebfu th\u00f4ng tin tr\u00ean c\u1ea3 hai \u0111\u1ea7u n\u1ed1i \u0111\u1ec1u gi\u1ed1ng nhau th\u00ec th\u01b0\u1eddng l\u00e0 \u0111\u1ea7u ra ki\u1ec3u \u0111\u1ea9y-k\u00e9o ho\u1eb7c \u0111\u1ea7u ra 4 d\u00e2y. Thay v\u00e0o \u0111\u00f3, h\u00e3y ki\u1ec3m tra m\u00e0u s\u1eafc c\u1ee7a c\u00e1c d\u00e2y.<\/span><\/li>\n <\/ol>\n<\/div>\n\n<h3>T\u1ea1i sao c\u1ea3m bi\u1ebfn NPN l\u1ea1i hi\u1ec3n th\u1ecb gi\u00e1 tr\u1ecb \u201c5 V\u201d (v\u00e0 c\u00e1ch ki\u1ec3m tra m\u00e0 kh\u00f4ng c\u1ea7n \u0111\u1ed3ng h\u1ed3 \u0111o)<\/h3>\n\n<p>T\u1ea1i sao l\u1ea1i ho\u00e1n \u0111\u1ed5i tham chi\u1ebfu? B\u1edfi v\u00ec khi c\u00f4ng t\u1eafc c\u1ee7a c\u1ea3m bi\u1ebfn NPN m\u1edf ra, n\u00f3 s\u1ebd <strong>kh\u00f4ng<\/strong> \u0110i\u1ec7n \u00e1p \u0111\u1ea7u ra l\u00e0 0 V. D\u00e2y \u0111\u1ea7u ra ch\u1ec9 c\u1ea7n ng\u1eaft k\u1ebft n\u1ed1i. N\u00f3 <strong>s\u1ed1 th\u1eadp ph\u00e2n<\/strong>. V\u00e0 m\u1ed9t d\u00e2y d\u1eabn kh\u00f4ng n\u1ed1i \u0111\u1ea5t khi \u0111o s\u1ebd hi\u1ec3n th\u1ecb b\u1ea5t k\u1ef3 \u0111i\u1ec7n \u00e1p n\u00e0o r\u00f2 r\u1ec9 v\u00e0o \u0111\u00f3: 3,3 V, 5 V, ho\u1eb7c m\u1ed9t v\u00e0i volt thay \u0111\u1ed5i ch\u1eadm ch\u1ea1p. Gi\u00e1 tr\u1ecb \u0111o \u1ea3o \u0111\u00f3 kh\u00f4ng ph\u1ea3i l\u00e0 l\u1ed7i v\u00e0 c\u0169ng kh\u00f4ng ph\u1ea3i do c\u1ea3m bi\u1ebfn h\u1ecfng. \u0110\u00f3 l\u00e0 do c\u00f4ng t\u1eafc b\u1ecb h\u1edf.<\/p>\n\n<div class=\"rich-callout bd-reveal\">\n <p class=\"rich-callout-title\"><span class=\"rich-ico\" aria-hidden=\"true\"><svg class=\"ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"m21.73 18-8-14a2 2 0 0 0-3.48 0l-8 14A2 2 0 0 0 4 21h16a2 2 0 0 0 1.73-3Z\"\/><path d=\"M12 9v4\"\/><path d=\"M12 17h.01\"\/><\/svg><\/span>Vi\u1ec7c \u0111o \u0111\u01b0\u1ee3c \u0111i\u1ec7n \u00e1p 5 V so v\u1edbi \u0111\u1ea5t tr\u00ean c\u1ea3m bi\u1ebfn NPN kh\u00f4ng ph\u1ea3i l\u00e0 s\u1ef1 c\u1ed1<\/p>\n <p>\u0110\u1ea7u ra NPN s\u1ebd \u1edf tr\u1ea1ng th\u00e1i n\u1ed5i khi t\u1eaft: \u0111\u00f3 l\u00e0 m\u1ed9t c\u00f4ng t\u1eafc m\u1edf, ch\u1ee9 kh\u00f4ng ph\u1ea3i b\u1ecb h\u1ecfng. \u0110i\u1ec7n \u00e1p tham chi\u1ebfu ch\u00ednh x\u00e1c cho c\u1ea3m bi\u1ebfn NPN l\u00e0 +24 V: khi \u0111\u01b0\u1ee3c k\u00edch ho\u1ea1t, \u0111i\u1ec7n \u00e1p tr\u00ean d\u00e2y s\u1ebd g\u1ea7n b\u1eb1ng 0 V so v\u1edbi \u0111\u01b0\u1eddng \u0111i\u1ec7n \u00e1p \u0111\u00f3. N\u1ebfu \u0111o so v\u1edbi \u0111\u01b0\u1eddng \u0111i\u1ec7n \u00e1p sai, b\u1ea1n s\u1ebd ph\u1ea3i m\u1ea5t c\u1ea3 bu\u1ed5i chi\u1ec1u \u0111\u1ec3 t\u00ecm ki\u1ebfm m\u1ed9t \u0111i\u1ec7n \u00e1p \u1ea3o.<\/p>\n<\/div>\n\n<p>Do \u0111\u00f3, c\u00e1c c\u1ea3m bi\u1ebfn NPN \u0111\u01b0\u1ee3c \u0111o <em>so v\u1edbi +24 V<\/em>: Khi \u0111\u01b0\u1ee3c k\u00edch ho\u1ea1t, \u0111i\u1ec7n \u00e1p tr\u00ean d\u00e2y g\u1ea7n b\u1eb1ng 0 V so v\u1edbi \u0111\u01b0\u1eddng \u0111i\u1ec7n \u0111\u00f3; khi \u0111\u01b0\u1ee3c th\u1ea3 ra, \u0111i\u1ec7n \u00e1p tr\u00ean d\u00e2y b\u1eb1ng to\u00e0n b\u1ed9 \u0111i\u1ec7n \u00e1p \u0111\u01b0\u1eddng \u0111i\u1ec7n. C\u00e1c c\u1ea3m bi\u1ebfn PNP \u0111\u01b0\u1ee3c \u0111o so v\u1edbi 0 V, trong \u0111\u00f3 \u0111\u1ea7u ra m\u1edf ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng s\u1ebd kh\u00f4ng hi\u1ec3n th\u1ecb gi\u00e1 tr\u1ecb n\u00e0o c\u1ea3.<\/p>\n\n<p>Kh\u00f4ng c\u00f3 \u0111\u1ed3ng h\u1ed3 v\u1ea1n n\u0103ng s\u1eb5n? M\u1ed9t b\u00f3ng \u0111\u00e8n th\u1eed ho\u1eb7c cu\u1ed9n d\u00e2y r\u01a1le DC nh\u1ecf c\u0169ng c\u00f3 t\u00e1c d\u1ee5ng t\u01b0\u01a1ng t\u1ef1. K\u1ebft n\u1ed1i n\u00f3 gi\u1eefa d\u00e2y \u0111\u1ea7u ra v\u00e0 \u0111\u01b0\u1eddng \u0111i\u1ec7n m\u00e0 b\u1ea1n nghi ng\u1edd, sau \u0111\u00f3 k\u00edch ho\u1ea1t c\u1ea3m bi\u1ebfn. Linh ki\u1ec7n n\u00e0o \u0111\u01b0\u1ee3c c\u1ea5p \u0111i\u1ec7n s\u1ebd cho b\u1ea1n bi\u1ebft \u0111\u01b0\u1eddng \u0111i\u1ec7n n\u00e0o \u0111\u01b0\u1ee3c c\u00f4ng t\u1eafc n\u1ed1i. V\u00e0 m\u1ed9t l\u01b0u \u00fd tr\u01b0\u1edbc khi tin t\u01b0\u1edfng v\u00e0o b\u1ea5t k\u1ef3 k\u1ebft qu\u1ea3 \u0111o n\u00e0o: m\u1ed9t c\u1ea3m bi\u1ebfn c\u00f3 b\u00f3ng b\u00e1n d\u1eabn \u0111\u1ea7u ra b\u1ecb ch\u00e1y c\u00f3 th\u1ec3 hi\u1ec3n th\u1ecb \u201clu\u00f4n b\u1eadt\u201d tr\u00ean c\u1ea3 hai \u0111\u01b0\u1eddng \u0111i\u1ec7n tham chi\u1ebfu. N\u1ebfu m\u1ed9t c\u1ea3m bi\u1ebfn ho\u00e0n to\u00e0n m\u1edbi l\u1ea1i ho\u1ea1t \u0111\u1ed9ng b\u1ea5t th\u01b0\u1eddng nh\u01b0 v\u1eady, h\u00e3y nghi ng\u1edd ch\u00ednh c\u1ea3m bi\u1ebfn \u0111\u00f3 tr\u01b0\u1edbc khi nghi ng\u1edd ph\u01b0\u01a1ng ph\u00e1p c\u1ee7a b\u1ea1n.<\/p>\n\n<h2>NPN v\u00e0 PNP: Lo\u1ea1i n\u00e0o m\u1edbi th\u1ef1c s\u1ef1 ph\u00f9 h\u1ee3p v\u1edbi b\u1ea1n?<\/h2>\n\n<p>B\u00e2y gi\u1edd b\u1ea1n \u0111\u00e3 bi\u1ebft m\u00ecnh c\u00f3 nh\u1eefng g\u00ec. C\u00e2u h\u1ecfi ti\u1ebfp theo l\u00e0 c\u00e1i n\u00e0o trong s\u1ed1 \u0111\u00f3 l\u00e0 c\u1ee7a b\u1ea1n <em>\u0111\u01a1n \u0111\u0103ng k\u00fd<\/em> nhu c\u1ea7u, v\u00e0 c\u00e2u tr\u1ea3 l\u1eddi ch\u00e2n th\u00e0nh l\u00e0 \u201cc\u00e1i n\u00e0o t\u1ed1t h\u01a1n\u201d kh\u00f4ng ph\u1ea3i l\u00e0 c\u00e2u h\u1ecfi \u0111\u00fang. T\u00ednh t\u01b0\u01a1ng th\u00edch m\u1edbi l\u00e0 y\u1ebfu t\u1ed1 quy\u1ebft \u0111\u1ecbnh, v\u00e0 t\u00ednh t\u01b0\u01a1ng th\u00edch c\u00f3 hai d\u1ea1ng kh\u00e1c nhau t\u00f9y thu\u1ed9c v\u00e0o vi\u1ec7c b\u1ea1n \u0111ang l\u1eafp r\u00e1p hay s\u1eeda ch\u1eefa.<\/p>\n\n<p><strong>N\u1ebfu b\u1ea1n \u0111ang k\u1ebft n\u1ed1i m\u1ed9t thi\u1ebft b\u1ecb m\u1edbi: th\u1ebb \u0111\u1ea7u v\u00e0o s\u1ebd quy\u1ebft \u0111\u1ecbnh.<\/strong> B\u1ea3ng \u0111i\u1ec1u khi\u1ec3n m\u1edbi, m\u00e1y m\u1edbi, d\u00e2y chuy\u1ec1n m\u1edbi: h\u00e3y \u0111\u1ecdc th\u00f4ng tin tr\u00ean th\u1ebb. Th\u1ebb \u0111\u1ea7u v\u00e0o ch\u00ecm (\u0111i\u1ec7n \u00e1p chung l\u00e0 0 V) s\u1eed d\u1ee5ng c\u1ea3m bi\u1ebfn PNP; th\u1ebb \u0111\u1ea7u v\u00e0o ngu\u1ed3n (\u0111i\u1ec7n \u00e1p chung l\u00e0 +24 V) s\u1eed d\u1ee5ng c\u1ea3m bi\u1ebfn NPN. <a href=\"https:\/\/www.se.com\/us\/en\/faqs\/FA142566\/\">Ph\u1ea7n C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p (FAQ) v\u1ec1 k\u1ef9 thu\u1eadt c\u1ee7a Schneider Electric \u0111\u00e3 n\u00eau r\u00f5 m\u1ed1i quan h\u1ec7 n\u00e0y: c\u00e1c \u0111\u1ea7u v\u00e0o ki\u1ec3u \u201csinking\u201d s\u1eed d\u1ee5ng c\u1ea3m bi\u1ebfn PNP, c\u00f2n c\u00e1c \u0111\u1ea7u v\u00e0o ki\u1ec3u \u201csourcing\u201d s\u1eed d\u1ee5ng c\u1ea3m bi\u1ebfn NPN. T\u00e0i li\u1ec7u n\u00e0y nh\u1ea5n m\u1ea1nh r\u1eb1ng vi\u1ec7c l\u1ef1a ch\u1ecdn c\u1ea3m bi\u1ebfn ph\u00f9 h\u1ee3p v\u1edbi lo\u1ea1i bo m\u1ea1ch \u0111\u1ea7u v\u00e0o l\u00e0 v\u00f4 c\u00f9ng quan tr\u1ecdng<\/a>.<\/p>\n\n<p>Trong khu\u00f4n kh\u1ed5 quy t\u1eafc \u0111\u00f3, th\u1ef1c ti\u1ec5n c\u00f4ng nghi\u1ec7p hi\u1ec7n \u0111\u1ea1i \u1edf B\u1eafc M\u1ef9 v\u00e0 ch\u00e2u \u00c2u \u0111\u00e3 th\u1ed1ng nh\u1ea5t \u00e1p d\u1ee5ng <strong>M\u1ea1ch PNP c\u00f3 \u0111\u1ea7u v\u00e0o ch\u00ecm<\/strong> l\u00e0m m\u1eb7c \u0111\u1ecbnh cho c\u00e1c thi\u1ebft k\u1ebf m\u1edbi. L\u00fd do l\u00e0 th\u1ef1c ti\u1ec5n, ch\u1ee9 kh\u00f4ng ph\u1ea3i mang t\u00ednh huy\u1ec1n b\u00ed. Logic d\u01b0\u01a1ng d\u1ec5 suy lu\u1eadn h\u01a1n (\u201cc\u00f3 \u0111i\u1ec7n \u00e1p 24 V = \u0111\u1ea7u v\u00e0o b\u1eadt\u201d), v\u00e0 vi\u1ec7c kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 so v\u1edbi m\u1ee9c 0 V n\u1ed1i \u0111\u1ea5t s\u1ebd nhanh h\u01a1n. B\u1ea1n c\u00f3 th\u1ec3 d\u00f9ng \u0111\u1ea7u d\u00f2 ki\u1ec3m tra b\u1ea5t k\u1ef3 h\u1ed9p n\u1ed1i n\u00e0o d\u1ecdc theo \u0111\u01b0\u1eddng d\u00e2y v\u00e0 \u0111o so v\u1edbi \u0111i\u1ec3m n\u1ed1i \u0111\u1ea5t g\u1ea7n nh\u1ea5t. H\u1ea7u h\u1ebft c\u00e1c th\u1ebb \u0111\u1ea7u v\u00e0o PLC hi\u1ec7n nay \u0111\u1ec1u c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh cho ch\u1ebf \u0111\u1ed9 h\u00fat d\u00f2ng (sinking) ho\u1eb7c cung c\u1ea5p d\u00f2ng (sourcing), do \u0111\u00f3 quy \u01b0\u1edbc n\u00e0y l\u00e0 m\u1ed9t s\u1ef1 l\u1ef1a ch\u1ecdn, ch\u1ee9 kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t r\u00e0ng bu\u1ed9c.<\/p>\n\n\n<div class=\"bp-cta-mid bd-reveal\">\n <p class=\"bp-cta-mid-ttl\"><span class=\"rich-ico\" aria-hidden=\"true\"><svg class=\"ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><rect width=\"16\" height=\"16\" x=\"4\" y=\"4\" rx=\"2\"\/><rect width=\"6\" height=\"6\" x=\"9\" y=\"9\" rx=\"1\"\/><path d=\"M15 2v2\"\/><path d=\"M15 20v2\"\/><path d=\"M2 15h2\"\/><path d=\"M2 9h2\"\/><path d=\"M20 15h2\"\/><path d=\"M20 9h2\"\/><path d=\"M9 2v2\"\/><path d=\"M9 20v2\"\/><\/svg><\/span>\u0110ang l\u1eafp \u0111\u1eb7t h\u1ec7 th\u1ed1ng d\u00e2y \u0111i\u1ec7n m\u1edbi hay thay th\u1ebf c\u1ea3m bi\u1ebfn?<\/p>\n <p class=\"bp-cta-mid-copy\">H\u00e3y cho ch\u00fang t\u00f4i bi\u1ebft b\u1ea1n \u0111ang s\u1eed d\u1ee5ng lo\u1ea1i th\u1ebb \u0111\u1ea7u v\u00e0o n\u00e0o, v\u00e0 ch\u00fang t\u00f4i s\u1ebd x\u00e1c nh\u1eadn lo\u1ea1i \u0111\u1ea7u ra ph\u00f9 h\u1ee3p v\u1edbi nhu c\u1ea7u c\u1ee7a b\u1ea1n tr\u01b0\u1edbc khi b\u1ea1n \u0111\u1eb7t h\u00e0ng.<\/p>\n <a class=\"bp-cta-mid-btn\" href=\"https:\/\/www.omch.com\/vi\/contact\/\" target=\"_self\">X\u00e1c nh\u1eadn lo\u1ea1i \u0111\u1ea7u ra c\u1ee7a t\u00f4i<\/a>\n<\/div>\n\n<p><strong>N\u1ebfu b\u1ea1n \u0111ang thay th\u1ebf m\u1ed9t c\u1ea3m bi\u1ebfn: m\u00e1y s\u1ebd t\u1ef1 \u0111\u1ed9ng quy\u1ebft \u0111\u1ecbnh.<\/strong><\/p>\n\n<p>C\u00f4ng t\u00e1c s\u1eeda ch\u1eefa v\u00e0 n\u00e2ng c\u1ea5p tu\u00e2n theo m\u1ed9t quy t\u1eafc ho\u00e0n to\u00e0n kh\u00e1c: <strong>H\u1ec7 th\u1ed1ng logic hi\u1ec7n c\u00f3 c\u1ee7a m\u00e1y s\u1ebd chi\u1ebfm \u01b0u th\u1ebf, b\u1ea5t k\u1ec3 \u0111\u1ea1i h\u1ed9i khu v\u1ef1c quy\u1ebft \u0111\u1ecbnh th\u1ebf n\u00e0o.<\/strong> Nhi\u1ec1u thi\u1ebft b\u1ecb s\u1ea3n xu\u1ea5t t\u1ea1i Nh\u1eadt B\u1ea3n v\u00e0 c\u00e1c n\u01b0\u1edbc ch\u00e2u \u00c1 \u0111\u00e3 s\u1eed d\u1ee5ng giao di\u1ec7n I\/O NPN trong nhi\u1ec1u th\u1eadp k\u1ef7 qua. C\u00e1c b\u1ed9 \u0111i\u1ec1u khi\u1ec3n logic kh\u1ea3 tr\u00ecnh (PLC) c\u1ee7a c\u00e1c th\u01b0\u01a1ng hi\u1ec7u l\u1edbn c\u1ee7a Nh\u1eadt B\u1ea3n t\u1eeb tr\u01b0\u1edbc \u0111\u1ebfn nay \u0111\u1ec1u \u0111\u01b0\u1ee3c trang b\u1ecb \u0111\u1ea7u ra NPN, trong khi nhi\u1ec1u PLC ch\u00e2u \u00c2u th\u1eadm ch\u00ed ch\u01b0a bao gi\u1edd cung c\u1ea5p lo\u1ea1i \u0111\u1ea7u ra n\u00e0y. K\u1ebft qu\u1ea3 l\u00e0 tr\u00ean th\u1ecb tr\u01b0\u1eddng b\u1ea3o tr\u00ec to\u00e0n c\u1ea7u hi\u1ec7n c\u00f3 m\u1ed9t l\u01b0\u1ee3ng l\u1edbn m\u00e1y m\u00f3c s\u1eed d\u1ee5ng giao di\u1ec7n NPN, \u0111\u01b0\u1ee3c \u0111\u1eb7t ngay c\u1ea1nh c\u00e1c h\u1ec7 th\u1ed1ng PNP m\u1edbi trong c\u00f9ng m\u1ed9t x\u01b0\u1edfng s\u1ea3n xu\u1ea5t.<\/p>\n\n<div class=\"rich-callout bd-reveal\">\n <p class=\"rich-callout-title\"><span class=\"rich-ico\" aria-hidden=\"true\"><svg class=\"ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"m21.73 18-8-14a2 2 0 0 0-3.48 0l-8 14A2 2 0 0 0 4 21h16a2 2 0 0 0 1.73-3Z\"\/><path d=\"M12 9v4\"\/><path d=\"M12 17h.01\"\/><\/svg><\/span>\u201cAi c\u0169ng d\u00f9ng PNP\u201d kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t quy t\u1eafc<\/p>\n <p>H\u1ed9i ngh\u1ecb khu v\u1ef1c ch\u1ec9 \u0111\u1ec1 c\u1eadp \u0111\u1ebfn c\u00e1c thi\u1ebft b\u1ecb m\u1edbi \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t. N\u00f3 kh\u00f4ng \u0111\u1ec1 c\u1eadp g\u00ec \u0111\u1ebfn m\u00e1y m\u00f3c t\u1ea1i x\u01b0\u1edfng c\u1ee7a b\u1ea1n. M\u1ed9t m\u00e1y \u00e9p s\u1ea3n xu\u1ea5t t\u1ea1i ch\u00e2u \u00c1, m\u1ed9t d\u00e2y chuy\u1ec1n \u0111\u00f3ng g\u00f3i nh\u1eadp kh\u1ea9u, hay m\u1ed9t b\u1ed9 \u0111i\u1ec1u khi\u1ec3n c\u00f3 c\u1ef1c chung +24 V \u0111\u1ec1u s\u1ebd \u201cng\u1ea7m\u201d y\u00eau c\u1ea7u lo\u1ea1i NPN. C\u00e2u tr\u1ea3 l\u1eddi \u201cti\u00eau chu\u1ea9n\u201d s\u1ebd khi\u1ebfn b\u1ea1n ph\u1ea3i ch\u1ecbu chi ph\u00ed g\u1eedi tr\u1ea3 h\u00e0ng. Khi c\u00f2n nghi ng\u1edd, h\u00e3y h\u1ecfi ch\u00ednh m\u00e1y m\u00f3c, ch\u1ee9 \u0111\u1eebng h\u1ecfi th\u1ecb tr\u01b0\u1eddng.<\/p>\n<\/div>\n\n<p>V\u1eady th\u00ec c\u00e1i n\u00e0o s\u1ebd \u201cth\u1eafng\u201d? C\u1ea3 hai \u0111\u1ec1u kh\u00f4ng. \u0110\u00f3 ch\u00ednh l\u00e0 nh\u1eadn \u0111\u1ecbnh \u0111\u00e1ng l\u01b0u \u00fd khi th\u1ef1c hi\u1ec7n c\u00f4ng t\u00e1c mua s\u1eafm. PNP ti\u1ebfp t\u1ee5c gi\u00e0nh \u0111\u01b0\u1ee3c c\u00e1c thi\u1ebft k\u1ebf b\u1ea3ng m\u1ea1ch m\u1edbi t\u1ea1i ch\u00e2u \u00c2u v\u00e0 M\u1ef9, trong khi NPN v\u1eabn gi\u1eef v\u1eefng v\u1ecb th\u1ebf c\u1ee7a m\u00ecnh \u1edf b\u1ea5t c\u1ee9 n\u01a1i n\u00e0o c\u00f3 s\u1eeda ch\u1eefa c\u00e1c m\u00e1y m\u00f3c s\u1ea3n xu\u1ea5t t\u1ea1i ch\u00e2u \u00c1 ho\u1eb7c c\u00e1c d\u00f2ng m\u00e1y c\u0169. Hai c\u1ea5u tr\u00fac n\u00e0y ph\u1ee5c v\u1ee5 hai l\u0129nh v\u1ef1c kinh t\u1ebf kh\u00e1c nhau: s\u1ea3n xu\u1ea5t m\u1edbi v\u00e0 b\u1ea3o tr\u00ec. N\u1ebfu doanh nghi\u1ec7p c\u1ee7a b\u1ea1n ho\u1ea1t \u0111\u1ed9ng trong c\u1ea3 hai l\u0129nh v\u1ef1c n\u00e0y (v\u00e0 h\u1ea7u h\u1ebft ng\u01b0\u1eddi mua c\u1ea3m bi\u1ebfn \u0111\u1ec1u nh\u01b0 v\u1eady), th\u00ec \u201cNPN so v\u1edbi PNP\u201d kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t l\u1ef1a ch\u1ecdn m\u00e0 b\u1ea1n ch\u1ec9 c\u1ea7n \u0111\u01b0a ra m\u1ed9t l\u1ea7n. \u0110\u00f3 l\u00e0 c\u00e2u h\u1ecfi b\u1ea1n c\u1ea7n tr\u1ea3 l\u1eddi cho t\u1eebng m\u00e1y, t\u1eebng \u0111\u01a1n h\u00e0ng, trong su\u1ed1t v\u00f2ng \u0111\u1eddi c\u1ee7a thi\u1ebft b\u1ecb.<\/p>\n\n<h2>Mua c\u1ea3m bi\u1ebfn: Nh\u1eefng y\u00eau c\u1ea7u c\u1ea7n n\u00eau r\u00f5 v\u1edbi nh\u00e0 cung c\u1ea5p<\/h2>\n\n<p>\u0110\u00e2y ch\u00ednh l\u00e0 l\u00fac lo\u1ea1i s\u1ea3n ph\u1ea9m kh\u00f4ng c\u00f2n ch\u1ec9 l\u00e0 m\u1ed9t kh\u00e1i ni\u1ec7m m\u00e0 tr\u1edf th\u00e0nh m\u1ed9t d\u00f2ng trong \u0111\u01a1n \u0111\u1eb7t h\u00e0ng. Trong danh m\u1ee5c s\u1ea3n ph\u1ea9m c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t, NPN v\u00e0 PNP kh\u00f4ng ph\u1ea3i l\u00e0 ph\u1ee5 ki\u1ec7n. Ch\u00fang l\u00e0 <strong>c\u00e1c m\u00e3 s\u1ea3n ph\u1ea9m kh\u00e1c nhau<\/strong>. C\u00f9ng m\u1ed9t v\u1ecf b\u1ecdc, c\u00f9ng m\u1ed9t kho\u1ea3ng c\u00e1ch ph\u00e1t hi\u1ec7n, c\u00f9ng m\u1ed9t m\u00e3 m\u00e0u d\u00e2y d\u1eabn, v\u00e0 m\u1ed7i lo\u1ea1i b\u00f3ng b\u00e1n d\u1eabn \u0111\u1ea7u ra l\u1ea1i c\u00f3 m\u1ed9t h\u1eadu t\u1ed1 ho\u1eb7c m\u00e3 model kh\u00e1c nhau. Nhi\u1ec1u nh\u00e0 cung c\u1ea5p m\u00e3 h\u00f3a c\u1ea5u tr\u00fac m\u1ea1ch tr\u1ef1c ti\u1ebfp v\u00e0o m\u00e3 model (vi\u1ec7c s\u1eed d\u1ee5ng h\u1eadu t\u1ed1 \u201c-N\u201d thay v\u00ec \u201c-P\u201d cho c\u00f9ng m\u1ed9t d\u00f2ng s\u1ea3n ph\u1ea9m nh\u01b0ng c\u00f3 c\u1ea5u tr\u00fac kh\u00e1c nhau l\u00e0 m\u1ed9t m\u1eabu ph\u1ed5 bi\u1ebfn). N\u1ebfu \u0111\u1eb7t h\u00e0ng \u201cc\u1ea3m bi\u1ebfn gi\u1ed1ng nh\u01b0 l\u1ea7n tr\u01b0\u1edbc\u201d, s\u1ea3n ph\u1ea9m s\u1ebd kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng n\u1ebfu \u0111\u01a1n h\u00e0ng tr\u01b0\u1edbc \u0111\u00f3 l\u00e0 d\u00e0nh cho m\u1ed9t m\u00e1y kh\u00e1c.<\/p>\n\n<div class=\"rich-card bd-reveal\">\n <p class=\"rich-card-title\"><span class=\"rich-ico\" aria-hidden=\"true\"><svg class=\"ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"m3 17 2 2 4-4\"\/><path d=\"m3 7 2 2 4-4\"\/><path d=\"M13 6h8\"\/><path d=\"M13 12h8\"\/><path d=\"M13 18h8\"\/><\/svg><\/span>B\u1ed1n b\u01b0\u1edbc ki\u1ec3m tra c\u1ea7n th\u1ef1c hi\u1ec7n tr\u01b0\u1edbc khi x\u00e1c nh\u1eadn b\u1ea5t k\u1ef3 \u0111\u01a1n \u0111\u1eb7t h\u00e0ng c\u1ea3m bi\u1ebfn n\u00e0o<\/p>\n <ul class=\"rich-list\">\n <li><span class=\"rich-ico\" aria-hidden=\"true\"><svg class=\"ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M22 11.08V12a10 10 0 1 1-5.93-9.14\"\/><path d=\"m9 11 3 3L22 4\"\/><\/svg><\/span><span>C\u1ea5u tr\u00fac \u0111\u1ea7u ra ph\u1ea3i \u0111\u01b0\u1ee3c ghi r\u00f5 trong \u0111\u01a1n \u0111\u1eb7t h\u00e0ng (NPN ho\u1eb7c PNP). Kh\u00f4ng bao gi\u1edd \u0111\u01b0\u1ee3c cho r\u1eb1ng \u0111i\u1ec1u n\u00e0y \u0111\u00e3 \u0111\u01b0\u1ee3c ng\u1ea7m hi\u1ec3u.<\/span><\/li>\n <li><span class=\"rich-ico\" aria-hidden=\"true\"><svg class=\"ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M22 11.08V12a10 10 0 1 1-5.93-9.14\"\/><path d=\"m9 11 3 3L22 4\"\/><\/svg><\/span><span>NO\/NC \u0111\u01b0\u1ee3c n\u00eau ri\u00eang bi\u1ec7t v\u1edbi c\u1ea5u tr\u00fac li\u00ean k\u1ebft (xem ph\u1ea7n v\u1ec1 s\u1ef1 c\u1ed1 b\u00ean d\u01b0\u1edbi: \u0111\u00e2y l\u00e0 hai y\u1ebfu t\u1ed1 \u0111\u1ed9c l\u1eadp v\u1edbi nhau).<\/span><\/li>\n <li><span class=\"rich-ico\" aria-hidden=\"true\"><svg class=\"ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M22 11.08V12a10 10 0 1 1-5.93-9.14\"\/><path d=\"m9 11 3 3L22 4\"\/><\/svg><\/span><span>M\u00e3 s\u1ea3n ph\u1ea9m tr\u00ean trang danh m\u1ee5c ph\u00f9 h\u1ee3p v\u1edbi lo\u1ea1i \u0111\u1ea7u ra m\u00e0 b\u1ea1n c\u1ea7n; n\u1ebfu trang \u0111\u00f3 li\u1ec7t k\u00ea c\u1ea3 hai bi\u1ebfn th\u1ec3, th\u00ec b\u1ea1n \u0111ang \u0111\u1eb7t h\u00e0ng m\u1ed9t m\u00e3 c\u1ee5 th\u1ec3.<\/span><\/li>\n <li><span class=\"rich-ico\" aria-hidden=\"true\"><svg class=\"ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M22 11.08V12a10 10 0 1 1-5.93-9.14\"\/><path d=\"m9 11 3 3L22 4\"\/><\/svg><\/span><span>N\u1ebfu \u0111\u00e2y l\u00e0 tr\u01b0\u1eddng h\u1ee3p thay th\u1ebf, b\u1ea1n n\u00ean ki\u1ec3m tra \u0111\u1ea7u n\u1ed1i chung c\u1ee7a bo m\u1ea1ch \u0111\u1ea7u v\u00e0o ho\u1eb7c ki\u1ec3m tra c\u1ea3m bi\u1ebfn c\u0169, thay v\u00ec ch\u1ec9 \u0111\u1ecdc nh\u00e3n tr\u00ean c\u1ea3m bi\u1ebfn \u0111\u00e3 h\u1ecfng.<\/span><\/li>\n <\/ul>\n<\/div>\n\n<p>Vi\u1ec7c ki\u1ec3m tra cu\u1ed1i c\u00f9ng n\u00e0y quan tr\u1ecdng h\u01a1n nhi\u1ec1u so v\u1edbi v\u1ebb b\u1ec1 ngo\u00e0i. Nh\u00e3n tr\u00ean c\u1ea3m bi\u1ebfn h\u1ecfng ch\u1ec9 l\u00e0 g\u1ee3i \u00fd, kh\u00f4ng ph\u1ea3i s\u1ef1 th\u1eadt: c\u00e1c c\u1ea3m bi\u1ebfn c\u00f3 th\u1ec3 \u0111\u00e3 b\u1ecb \u0111\u1ed9i s\u1eeda ch\u1eefa tr\u01b0\u1edbc \u0111\u00f3 thay th\u1ebf, v\u00e0 nh\u00e3n ch\u1ec9 m\u00f4 t\u1ea3 nh\u1eefng g\u00ec \u0111\u00e3 \u0111\u01b0\u1ee3c giao, ch\u1ee9 kh\u00f4ng ph\u1ea3i nh\u1eefng g\u00ec m\u00e1y m\u00f3c th\u1ef1c s\u1ef1 c\u1ea7n. Vi\u1ec7c l\u1eafp nh\u1ea7m bo m\u1ea1ch c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn th\u1eddi gian ch\u1edd l\u00ean \u0111\u1ebfn 6 tu\u1ea7n \u2013 m\u1ed9t chi ph\u00ed th\u1ef1c t\u1ebf \u0111\u00e3 \u0111\u01b0\u1ee3c c\u00e1c k\u1ef9 s\u01b0 t\u1eebng tr\u1ea3i qua m\u00f4 t\u1ea3. Vi\u1ec7c ki\u1ec3m tra c\u00e1c \u0111i\u1ec3m n\u1ed1i chung trong 10 gi\u00e2y ch\u00ednh l\u00e0 bi\u1ec7n ph\u00e1p ph\u00f2ng ng\u1eeba r\u1ebb nh\u1ea5t tr\u00ean b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n.<\/p>\n\n<p>M\u1ed9t l\u01b0u \u00fd n\u1eefa khi b\u1ea1n \u0111ang \u1edf m\u00e0n h\u00ecnh \u0111\u1eb7t h\u00e0ng: c\u00e1c thi\u1ebft b\u1ecb \u0111\u1ea7u ra ti\u1ebfp \u0111i\u1ec3m kh\u00f4ng thu\u1ed9c ph\u1ea1m vi th\u1ea3o lu\u1eadn n\u00e0y. N\u1ebfu b\u1ea1n \u0111ang mua c\u00f4ng t\u1eafc gi\u1edbi h\u1ea1n ho\u1eb7c c\u00f4ng t\u1eafc vi m\u00f4, s\u1ebd kh\u00f4ng c\u00f3 th\u00f4ng s\u1ed1 NPN\/PNP n\u00e0o c\u1ea7n ch\u1ec9 \u0111\u1ecbnh. Ti\u1ebfp \u0111i\u1ec3m c\u01a1 h\u1ecdc kh\u00f4ng ph\u00e2n bi\u1ec7t \u0111\u01b0\u1eddng ray n\u00e0o \u0111\u01b0\u1ee3c k\u00edch ho\u1ea1t. Ch\u1ec9 c\u1ea7n h\u1ecfi v\u1ec1 c\u1ea5u tr\u00fac \u0111\u1ea7u ra khi c\u00f3 \u0111\u1ea7u ra DC b\u00e1n d\u1eabn, v\u00e0 b\u1ea1n s\u1ebd kh\u00f4ng bao gi\u1edd ph\u1ea3i y\u00eau c\u1ea7u m\u1ed9t linh ki\u1ec7n kh\u00f4ng t\u1ed3n t\u1ea1i.<\/p>\n\n\n<div class=\"bp-3-pn bd-reveal\">\n <p class=\"bp-3-title\"><span class=\"rich-ico\" aria-hidden=\"true\"><svg class=\"ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M12.586 2.586A2 2 0 0 0 11.172 2H4a2 2 0 0 0-2 2v7.172a2 2 0 0 0 .586 1.414l8.704 8.704a2.426 2.426 0 0 0 3.42 0l6.58-6.58a2.426 2.426 0 0 0 0-3.42z\"\/><circle cx=\"7.5\" cy=\"7.5\" r=\".5\" fill=\"currentColor\"\/><\/svg><\/span>Lo\u1ea1i \u0111\u1ea7u ra \u0111\u01b0\u1ee3c ghi trong m\u00e3 s\u1ea3n ph\u1ea9m<\/p>\n <div class=\"bp-3-grid\">\n <div class=\"bp-3-cell\">\n <span class=\"bp-3-chip\">-N<\/span>\n <span class=\"bp-3-cellcopy\"><span class=\"bp-3-celllabel\">\u0110\u1ea7u ra NPN<\/span><span class=\"bp-3-cellsub\">\u0110\u01b0a m\u1ee9c \u0111i\u1ec7n \u00e1p \u0111\u1ea7u ra v\u1ec1 0 V<\/span><\/span>\n <\/div>\n <div class=\"bp-3-cell\">\n <span class=\"bp-3-chip\">-P<\/span>\n <span class=\"bp-3-cellcopy\"><span class=\"bp-3-celllabel\">\u0110\u1ea7u ra PNP<\/span><span class=\"bp-3-cellsub\">Cung c\u1ea5p ngu\u1ed3n +24 V cho t\u1ea3i<\/span><\/span>\n <\/div>\n <\/div>\n <p class=\"bp-3-foot\">S\u1eafp x\u1ebfp theo m\u00e3 s\u1ea3n ph\u1ea9m, kh\u00f4ng ph\u1ea3i theo dung l\u01b0\u1ee3ng b\u1ed9 nh\u1edb.<\/p>\n<\/div>\n\n<h2>C\u00e1c ch\u1ebf \u0111\u1ed9 h\u1ecfng h\u00f3c, NO\/NC v\u00e0 chuy\u1ec3n \u0111\u1ed5i NPN\u2194PNP<\/h2>\n\n<p>C\u1ea3m bi\u1ebfn c\u00f3 th\u1ec3 b\u1ecb h\u1ecfng, v\u00e0 nh\u1eefng c\u1ea3m bi\u1ebfn b\u1ecb \u0111\u1ea5u d\u00e2y sai l\u1ea1i cho th\u1ea5y nh\u1eefng d\u1ea5u hi\u1ec7u h\u1ecfng h\u00f3c r\u1ea5t d\u1ec5 nh\u1eadn bi\u1ebft. C\u00f3 hai h\u01b0\u1edbng h\u1ecfng h\u00f3c m\u00e0 b\u1ea1n c\u1ea7n l\u01b0u \u00fd tr\u01b0\u1edbc khi ch\u00fang khi\u1ebfn b\u1ea1n ph\u1ea3i b\u1ecf l\u1ee1 ca l\u00e0m vi\u1ec7c, v\u00e0 m\u1ed9t trong s\u1ed1 \u0111\u00f3 th\u1ef1c s\u1ef1 \u0111i ng\u01b0\u1ee3c l\u1ea1i v\u1edbi tr\u1ef1c gi\u00e1c.<\/p>\n\n<h3>Ch\u1ee9c n\u0103ng th\u1ef1c s\u1ef1 c\u1ee7a hi\u1ec7n t\u01b0\u1ee3ng ch\u1ea1m \u0111\u1ea5t ng\u1eafn m\u1ea1ch: T\u1ea1i sao c\u00e2u n\u00f3i \u201cPNP an to\u00e0n h\u01a1n\u201d ch\u1ec9 l\u00e0 m\u1ed9t n\u1eeda s\u1ef1 th\u1eadt<\/h3>\n\n<p>L\u1ea5y m\u1ed9t c\u1ea3m bi\u1ebfn PNP v\u00e0 n\u1ed1i ng\u1eafn d\u00e2y \u0111\u1ea7u ra c\u1ee7a n\u00f3 v\u1edbi \u0111\u1ea5t: m\u1ed9t s\u1ee3i c\u00e1p b\u1ecb m\u00f2n, m\u1ed9t \u1ed1ng d\u1eabn b\u1ecb d\u1eadp n\u00e1t, m\u1ed9t s\u1ee3i d\u00e2y l\u1ecfng l\u1ebbo ch\u1ea1m v\u00e0o khung. L\u00fac n\u00e0y, c\u00f4ng t\u1eafc ph\u00eda d\u01b0\u01a1ng s\u1ebd n\u1ed1i tr\u1ef1c ti\u1ebfp +24 V v\u1edbi \u0111\u1ea5t qua \u0111i\u1ec3m l\u1ed7i. M\u1ed9t c\u01a1 ch\u1ebf b\u1ea3o v\u1ec7 n\u00e0o \u0111\u00f3 s\u1ebd ho\u1ea1t \u0111\u1ed9ng: c\u1ea7u ch\u00ec b\u1ecb \u0111\u1ee9t, c\u00f4ng t\u1eafc ng\u1eaft m\u1ea1ch nh\u1ea3y, b\u1ed9 ngu\u1ed3n ng\u1eaft ngu\u1ed3n, ho\u1eb7c c\u01a1 ch\u1ebf b\u1ea3o v\u1ec7 ng\u1eafn m\u1ea1ch c\u1ee7a ch\u00ednh c\u1ea3m bi\u1ebfn s\u1ebd k\u00edch ho\u1ea1t. L\u1ed7i l\u00e0 <strong>c\u00f3 th\u1ec3 nh\u00ecn th\u1ea5y<\/strong>: d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua, c\u00f3 th\u1ee9 g\u00ec \u0111\u00f3 ph\u1ea3n \u1ee9ng l\u1ea1i, v\u00e0 m\u00e1y d\u1eebng l\u1ea1i \u1edf tr\u1ea1ng th\u00e1i m\u00e0 ai \u0111\u00f3 c\u00f3 th\u1ec3 ph\u00e1t hi\u1ec7n ra.<\/p>\n\n<p>B\u00e2y gi\u1edd h\u00e3y l\u00e0m t\u01b0\u01a1ng t\u1ef1 v\u1edbi m\u1ed9t c\u1ea3m bi\u1ebfn NPN. C\u00f4ng t\u1eafc c\u1ee7a n\u00f3 n\u1eb1m \u1edf ph\u00eda \u0111i\u1ec7n \u00e1p th\u1ea5p; vi\u1ec7c n\u1ed1i ng\u1eafn \u0111\u1ea7u ra c\u1ee7a n\u00f3 v\u1edbi \u0111\u1ea5t ho\u00e0n to\u00e0n kh\u00f4ng t\u1ea1o ra b\u1ea5t k\u1ef3 \u0111\u01b0\u1eddng d\u1eabn d\u00f2ng \u0111i\u1ec7n b\u1ea5t th\u01b0\u1eddng n\u00e0o. T\u1ea3i \u0111\u01a1n gi\u1ea3n l\u00e0 \u0111\u01b0\u1ee3c k\u00edch ho\u1ea1t \u201cb\u1eadt\u201d b\u1ea5t k\u1ec3 c\u1ea3m bi\u1ebfn ph\u00e1t hi\u1ec7n \u0111\u01b0\u1ee3c g\u00ec, m\u1ed9t <strong>false B\u1eacT<\/strong>, v\u00e0 kh\u00f4ng c\u00f3 thi\u1ebft b\u1ecb n\u00e0o, \u1edf b\u1ea5t k\u1ef3 \u0111\u00e2u, ph\u1ea3n \u1ee9ng l\u1ea1i. M\u1ed9t v\u00ed d\u1ee5 \u0111i\u1ec3n h\u00ecnh v\u1ec1 s\u1ef1 c\u1ed1 l\u00e0 c\u1ea3m bi\u1ebfn m\u1ee9c ch\u1ea5t l\u1ecfng trong b\u1ec3 khi d\u00e2y t\u00edn hi\u1ec7u c\u1ee7a n\u00f3 b\u1ecb ch\u1ea1m \u0111\u1ea5t: m\u00e1y b\u01a1m v\u1eabn ti\u1ebfp t\u1ee5c ch\u1ea1y, kh\u00f4ng ai \u0111\u01b0\u1ee3c c\u1ea3nh b\u00e1o, v\u00e0 v\u1ea5n \u0111\u1ec1 ch\u1ec9 \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n khi b\u1ec3 b\u1ecb tr\u00e0n.<\/p>\n\n\n<div class=\"bp-2-fault bd-reveal\">\n <p class=\"bp-2-title\"><span class=\"rich-ico\" aria-hidden=\"true\"><svg class=\"ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><polygon points=\"13 2 3 14 12 14 11 22 21 10 12 10 13 2\"\/><\/svg><\/span>M\u1ed9t s\u1ef1 ng\u1eafn m\u1ea1ch v\u1edbi \u0111\u1ea5t c\u00f3 bi\u1ec3u hi\u1ec7n kh\u00e1c bi\u1ec7t<\/p>\n <div class=\"bp-2-grid\">\n <div class=\"bp-2-cell\">\n <p class=\"bp-2-celllabel\"><span class=\"cell-ico\" aria-hidden=\"true\"><svg class=\"ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"m2 2 20 20\"\/><path d=\"M5 5a1 1 0 0 0-1 1v7c0 5 3.5 7.5 7.67 8.94a1 1 0 0 0 .67.01c2.35-.82 4.48-1.97 5.9-3.71\"\/><path d=\"M9.309 3.652A12.252 12.252 0 0 0 11.24 2.28a1.17 1.17 0 0 1 1.52 0C14.51 3.81 17 5 19 5a1 1 0 0 1 1 1v7a9.784 9.784 0 0 1-.08 1.264\"\/><\/svg><\/span>\u0110\u1ea7u ra PNP b\u1ecb ng\u1eafn m\u1ea1ch v\u1edbi \u0111\u1ea5t<\/p>\n <p class=\"bp-2-cellline\">D\u00f2ng \u0111i\u1ec7n qu\u00e1 t\u1ea3i s\u1ebd l\u00e0m ng\u1eaft c\u1ea7u ch\u00ec ho\u1eb7c k\u00edch ho\u1ea1t c\u01a1 ch\u1ebf b\u1ea3o v\u1ec7 c\u1ee7a c\u1ea3m bi\u1ebfn, v\u00e0 s\u1ef1 c\u1ed1 s\u1ebd \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n.<\/p>\n <\/div>\n <div class=\"bp-2-cell\">\n <p class=\"bp-2-celllabel\"><span class=\"cell-ico\" aria-hidden=\"true\"><svg class=\"ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M7 16.3c2.2 0 4-1.83 4-4.05 0-1.16-.57-2.26-1.71-3.19S7.29 6.75 7 5.3c-.29 1.45-1.14 2.84-2.29 3.76S3 11.1 3 12.25c0 2.22 1.8 4.05 4 4.05z\"\/><path d=\"M12.56 6.6A10.97 10.97 0 0 0 14 3.02c.5 2.5 2 4.9 4 6.5s3 3.5 3 5.5a6.98 6.98 0 0 1-11.91 4.97\"\/><\/svg><\/span>\u0110\u1ea7u ra NPN b\u1ecb ng\u1eafn m\u1ea1ch v\u1edbi \u0111\u1ea5t<\/p>\n <p class=\"bp-2-cellline\">Kh\u00f4ng c\u00f3 d\u00f2ng \u0111i\u1ec7n b\u1ea5t th\u01b0\u1eddng; t\u1ea3i v\u1eabn ho\u1ea1t \u0111\u1ed9ng, m\u1ed9t tr\u1ea1ng th\u00e1i \u201cB\u1eacT\u201d gi\u1ea3 m\u1ea1o \u1ea9n \u0111i cho \u0111\u1ebfn khi b\u1ec3 tr\u00e0n.<\/p>\n <\/div>\n <\/div>\n<\/div>\n\n<p>S\u1ef1 b\u1ea5t \u0111\u1ed1i x\u1ee9ng n\u00e0y ch\u00ednh l\u00e0 n\u1ed9i dung th\u1ef1c s\u1ef1 \u1ea9n ch\u1ee9a \u0111\u1eb1ng sau kh\u1ea9u hi\u1ec7u \u201cPNP an to\u00e0n h\u01a1n\u201d. Kh\u00f4ng ph\u1ea3i l\u00e0 logic PNP v\u1ed1n d\u0129 kh\u00f4ng th\u1ec3 x\u1ea3y ra l\u1ed7i. M\u00e0 l\u00e0 khi x\u1ea3y ra l\u1ed7i ch\u1ea1m \u0111\u1ea5t tr\u00ean c\u00f4ng t\u1eafc ph\u00eda cao, l\u1ed7i \u0111\u00f3 s\u1ebd \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n, trong khi c\u00f9ng m\u1ed9t l\u1ed7i tr\u00ean c\u00f4ng t\u1eafc ph\u00eda th\u1ea5p l\u1ea1i \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 kh\u00f4ng ph\u00e1t ra t\u00edn hi\u1ec7u c\u1ea3nh b\u00e1o. Khi ai \u0111\u00f3 n\u00f3i v\u1edbi b\u1ea1n r\u1eb1ng NPN kh\u00f4ng an to\u00e0n, \u0111i\u1ec1u h\u1ecd th\u01b0\u1eddng mu\u1ed1n n\u00f3i l\u00e0: <em>C\u00e1c l\u1ed7i NPN kh\u00f3 ph\u00e1t hi\u1ec7n h\u01a1n khi ki\u1ec3m tra b\u1eb1ng m\u00e1y \u0111o v\u00e0 trong qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t.<\/em> \u0110\u00f3 l\u00e0 m\u1ed9t l\u1eadp lu\u1eadn li\u00ean quan \u0111\u1ebfn vi\u1ec7c kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1. \u0110\u1ed1i v\u1edbi c\u00e1c \u0111\u1ed9i b\u1ea3o tr\u00ec khi ki\u1ec3m tra c\u00e1c h\u1ed9p n\u1ed1i v\u1edbi m\u1ed9t \u0111\u1ea7u d\u00e2y \u0111o \u0111\u01b0\u1ee3c k\u1eb9p v\u00e0o \u0111\u1ea5t, \u0111\u00e2y l\u00e0 m\u1ed9t l\u1eadp lu\u1eadn r\u1ea5t thuy\u1ebft ph\u1ee5c, v\u00e0 ch\u00ednh v\u00ec l\u00fd do \u0111\u00f3 m\u00e0 PNP \u0111\u00e3 tr\u1edf th\u00e0nh ti\u00eau chu\u1ea9n trong c\u00e1c h\u1ec7 th\u1ed1ng l\u1eafp \u0111\u1eb7t m\u1edbi. Tuy nhi\u00ean, \u0111\u00e2y kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t \u0111\u1eb7c t\u00ednh an to\u00e0n v\u1ed1n c\u00f3 c\u1ee7a ch\u00ednh m\u1ea1ch logic, v\u00e0 b\u1ea1n n\u00ean bi\u1ebft \u0111i\u1ec1u n\u00e0y tr\u01b0\u1edbc khi ti\u1ebfn h\u00e0nh n\u1ed1i l\u1ea1i d\u00e2y cho m\u1ed9t m\u00e1y m\u00f3c \u0111ang ho\u1ea1t \u0111\u1ed9ng ch\u1ec9 d\u1ef1a tr\u00ean m\u1ed9t kh\u1ea9u hi\u1ec7u.<\/p>\n\n<h3>NO\/NC l\u00e0 m\u1ed9t tr\u1ee5c ri\u00eang bi\u1ec7t: tuy\u1ec7t \u0111\u1ed1i kh\u00f4ng \u0111\u01b0\u1ee3c g\u1ed9p chung v\u1edbi lo\u1ea1i \u0111\u1ea7u ra<\/h3>\n\n<p>Kh\u00e1i ni\u1ec7m \u201cth\u01b0\u1eddng m\u1edf\u201d v\u00e0 \u201cth\u01b0\u1eddng \u0111\u00f3ng\u201d kh\u00f4ng li\u00ean quan g\u00ec \u0111\u1ebfn s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa NPN v\u00e0 PNP. \u0110\u00e2y l\u00e0 hai th\u00f4ng s\u1ed1 \u0111\u1ed9c l\u1eadp, v\u00e0 b\u1ea3ng k\u1ebft h\u1ee3p c\u00f3 b\u1ed1n \u00f4 h\u1ee3p l\u1ec7, ch\u1ee9 kh\u00f4ng ph\u1ea3i hai:<\/p>\n\n<div class=\"rich-table-wrap bd-reveal\">\n <p class=\"rich-table-title\">NPN\/PNP v\u00e0 NO\/NC l\u00e0 c\u00e1c tr\u1ee5c \u0111\u1ed9c l\u1eadp<\/p>\n <div class=\"table-wrapper\">\n <table class=\"rich-table\">\n <thead>\n <tr><th><\/th><th>NPN (c\u00f4ng t\u1eafc ph\u00eda d\u01b0\u1edbi)<\/th><th>PNP (c\u00f4ng t\u1eafc ph\u00eda tr\u00ean)<\/th><\/tr>\n <\/thead>\n <tbody>\n <tr><td>NO (th\u01b0\u1eddng m\u1edf)<\/td><td>Khi ph\u00e1t hi\u1ec7n, \u0111i\u1ec7n \u00e1p gi\u1ea3m xu\u1ed1ng m\u1ee9c th\u1ea5p \u2192 \u0111\u1ea7u v\u00e0o \u1edf tr\u1ea1ng th\u00e1i B\u1eacT<\/td><td>Khi ph\u00e1t hi\u1ec7n, s\u1ebd g\u1eedi t\u00edn hi\u1ec7u 24 V \u2192 \u0111\u1ea7u v\u00e0o \u1edf tr\u1ea1ng th\u00e1i B\u1eacT<\/td><\/tr>\n <tr><td>NC (th\u01b0\u1eddng \u0111\u00f3ng)<\/td><td>S\u1ebd h\u1ea1 xu\u1ed1ng khi KH\u00d4NG ph\u00e1t hi\u1ec7n; s\u1ebd m\u1edf ra khi ph\u00e1t hi\u1ec7n<\/td><td>G\u1eedi t\u00edn hi\u1ec7u 24 V khi KH\u00d4NG ph\u00e1t hi\u1ec7n; m\u1edf khi ph\u00e1t hi\u1ec7n<\/td><\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n<\/div>\n\n<p>Schneider Electric \u0111\u00e3 n\u00eau r\u00f5 quan \u0111i\u1ec3m n\u00e0y trong ph\u1ea7n C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 PNP\/NPN: lo\u1ea1i \u0111\u1ea7u ra \u201ckh\u00f4ng li\u00ean quan g\u00ec \u0111\u1ebfn vi\u1ec7c c\u1ea3m bi\u1ebfn l\u00e0 lo\u1ea1i th\u01b0\u1eddng m\u1edf hay th\u01b0\u1eddng \u0111\u00f3ng\u201d. \u0110i\u1ec1u n\u00e0y ch\u1ec9 ph\u1ee5 thu\u1ed9c v\u00e0o thi\u1ebft k\u1ebf m\u1ea1ch b\u00ean trong. V\u00e0 hai tr\u1ee5c n\u00e0y c\u00f3 vai tr\u00f2 kh\u00e1c nhau trong tr\u01b0\u1eddng h\u1ee3p s\u1ef1 c\u1ed1. NO\/NC quy\u1ebft \u0111\u1ecbnh h\u01b0\u1edbng m\u00e0 d\u00e2y b\u1ecb \u0111\u1ee9t ho\u1eb7c c\u1ea3m bi\u1ebfn h\u1ecfng s\u1ebd g\u00e2y ra s\u1ef1 c\u1ed1 (m\u1edf = quy tr\u00ecnh d\u1eebng l\u1ea1i; \u0111\u00f3ng = quy tr\u00ecnh ti\u1ebfp t\u1ee5c). NPN\/PNP quy\u1ebft \u0111\u1ecbnh c\u00e1ch x\u1eed l\u00fd s\u1ef1 c\u1ed1 ch\u1ea1m \u0111\u1ea5t. N\u1ebfu b\u1ea1n \u0111\u1eb7t h\u00e0ng c\u1ea3m bi\u1ebfn ch\u1ec9 d\u1ef1a tr\u00ean m\u1ed9t tr\u1ee5c duy nh\u1ea5t, b\u1ea1n m\u1edbi ch\u1ec9 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c m\u1ed9t n\u1eeda th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a linh ki\u1ec7n.<\/p>\n\n<h3>B\u1ea1n \u0111ang c\u00f3 lo\u1ea1i kh\u00f4ng ph\u00f9 h\u1ee3p: lo\u1ea1i n\u00e0o th\u1ef1c s\u1ef1 hi\u1ec7u qu\u1ea3?<\/h3>\n\n<p>V\u1eady l\u00e0 c\u1ea3m bi\u1ebfn \u0111\u00e3 \u0111\u1ebfn, ho\u1eb7c \u0111\u00e3 \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t, nh\u01b0ng c\u1ea5u tr\u00fac c\u1ee7a n\u00f3 kh\u00f4ng ph\u00f9 h\u1ee3p v\u1edbi \u0111\u1ea7u v\u00e0o. Tr\u01b0\u1edbc khi b\u1ea1n chi tr\u1ea3 ph\u00ed v\u1eadn chuy\u1ec3n tr\u1ea3 l\u1ea1i, h\u00e3y t\u00ecm hi\u1ec3u c\u00e1c ph\u01b0\u01a1ng \u00e1n chuy\u1ec3n \u0111\u1ed5i v\u00e0 nh\u1eefng h\u1ea1n ch\u1ebf th\u1ef1c t\u1ebf c\u1ee7a ch\u00fang:<\/p>\n\n<div class=\"rich-table-wrap bd-reveal\">\n <p class=\"rich-table-title\">C\u00e1c t\u00f9y ch\u1ecdn chuy\u1ec3n \u0111\u1ed5i NPN\u2194PNP v\u00e0 gi\u1edbi h\u1ea1n c\u1ee7a ch\u00fang<\/p>\n <div class=\"table-wrapper\">\n <table class=\"rich-table\">\n <thead>\n <tr><th>T\u00f9y ch\u1ecdn<\/th><th>\u00c1p d\u1ee5ng cho<\/th><th>\u0110i\u1ec3m y\u1ebfu c\u1ee7a n\u00f3 l\u00e0 g\u00ec<\/th><th>Chi ph\u00ed<\/th><\/tr>\n <\/thead>\n <tbody>\n <tr><td>R\u01a1le giao di\u1ec7n (cu\u1ed9n d\u00e2y \u0111\u00f3ng vai tr\u00f2 l\u00e0 t\u1ea3i)<\/td><td>T\u00edn hi\u1ec7u c\u00f4ng t\u1eafc ch\u1eadm; \u0111i\u1ec7n \u00e1p cu\u1ed9n d\u00e2y ph\u00f9 h\u1ee3p<\/td><td>Th\u1eddi gian ph\u1ea3n h\u1ed3i c\u1ee7a r\u01a1le kho\u1ea3ng 10 ms kh\u00f4ng th\u1ec3 theo k\u1ecbp t\u1ed1c \u0111\u1ed9 \u0111\u1ebfm nhanh; tu\u1ed5i th\u1ecd cu\u1ed9n d\u00e2y c\u00f3 h\u1ea1n<\/td><td>Th\u1ea5p nh\u1ea5t<\/td><\/tr>\n <tr><td>B\u1ed9 gh\u00e9p quang<\/td><td>C\u1ea7n c\u00e1ch ly; t\u00edn hi\u1ec7u t\u1ed1c \u0111\u1ed9 trung b\u00ecnh<\/td><td>Ph\u1ea3i t\u00ednh to\u00e1n ng\u01b0\u1ee1ng d\u00f2ng \u0111i\u1ec7n ph\u00eda \u0111\u1ea7u v\u00e0o (kho\u1ea3ng 5\u201312 mA); th\u00eam hai b\u01b0\u1edbc n\u1ed1i d\u00e2y<\/td><td>Th\u1ea5p<\/td><\/tr>\n <tr><td>\u0110i\u1ec7n tr\u1edf k\u00e9o l\u00ean \/ k\u00e9o xu\u1ed1ng<\/td><td>Gi\u1ea3i ph\u00e1p t\u1ea1m th\u1eddi; x\u00e1c minh ki\u1ec3u<\/td><td>Kh\u00f4ng \u1ed5n \u0111\u1ecbnh: thay \u0111\u1ed5i theo nhi\u1ec7t \u0111\u1ed9, d\u00f2ng t\u1ea3i gi\u1edbi h\u1ea1n, ph\u1ea3n \u1ee9ng ch\u1eadm h\u01a1n; ch\u1ec9 ho\u1ea1t \u0111\u1ed9ng \u1edf t\u1ed1c \u0111\u1ed9 th\u1ea5p v\u00e0 t\u1ea3i nh\u1eb9<\/td><td>G\u1ea7n nh\u01b0 b\u1eb1ng kh\u00f4ng<\/td><\/tr>\n <tr><td>B\u1ed9 chuy\u1ec3n \u0111\u1ed5i chuy\u00ean d\u1ee5ng NPN\u2194PNP<\/td><td>Tr\u1ed9n d\u00e0i h\u1ea1n; t\u00edn hi\u1ec7u nhanh<\/td><td>Chi\u1ebfm ch\u1ed7 tr\u00ean \u0111\u01b0\u1eddng ray v\u00e0 m\u1ed9t khe c\u1eafm ngu\u1ed3n; th\u00eam m\u1ed9t b\u1ed9 ph\u1eadn c\u00f3 th\u1ec3 h\u1ecfng h\u00f3c<\/td><td>Trung b\u00ecnh<\/td><\/tr>\n <tr><td>C\u1ea3m bi\u1ebfn ch\u00ednh x\u00e1c<\/td><td>B\u1ea5t k\u1ef3 t\u00ecnh hu\u1ed1ng n\u00e0o<\/td><td>Th\u1eddi gian giao h\u00e0ng v\u00e0 ph\u00ed v\u1eadn chuy\u1ec3n tr\u1ea3 h\u00e0ng<\/td><td>T\u00f9y thu\u1ed9c v\u00e0o th\u1eddi gian giao h\u00e0ng<\/td><\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n<\/div>\n\n<p>M\u00f4 h\u00ecnh chung cho m\u1ecdi d\u00f2ng s\u1ea3n ph\u1ea9m: c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed chuy\u1ec3n \u0111\u1ed5i mang l\u1ea1i kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch v\u1edbi c\u00e1i gi\u00e1 l\u00e0 <strong>t\u1ed1c \u0111\u1ed9, s\u1ef1 \u0111\u01a1n gi\u1ea3n hay t\u00ednh b\u1ec1n v\u1eefng<\/strong>. M\u1ed9t \u0111i\u1ec7n tr\u1edf k\u00e9o l\u00ean c\u00f3 th\u1ec3 gi\u00fap c\u1ea3m bi\u1ebfn NPN \u0111i\u1ec1u khi\u1ec3n \u0111\u1ea7u v\u00e0o PNP. H\u00e3y h\u1ecfi b\u1ea5t k\u1ef3 k\u1ef9 s\u01b0 n\u00e0o tr\u00ean di\u1ec5n \u0111\u00e0n, b\u1ea1n s\u1ebd th\u1ea5y th\u1ee7 thu\u1eadt n\u00e0y \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng h\u00e0ng ng\u00e0y. Tuy nhi\u00ean, \u0111\u00e2y ch\u1ec9 l\u00e0 m\u1ed9t gi\u1ea3i ph\u00e1p t\u1ea1m th\u1eddi tr\u00ean b\u00e0n th\u00ed nghi\u1ec7m v\u1edbi nh\u1eefng h\u1ea1n ch\u1ebf th\u1ef1c t\u1ebf (d\u00f2ng t\u1ea3i, \u0111\u1ed9 tr\u00f4i nhi\u1ec7t \u0111\u1ed9, th\u1eddi gian \u0111\u00e1p \u1ee9ng), ch\u1ee9 kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t quy\u1ebft \u0111\u1ecbnh thi\u1ebft k\u1ebf. R\u01a1le giao di\u1ec7n ph\u00f9 h\u1ee3p cho t\u00edn hi\u1ec7u hi\u1ec7n di\u1ec7n thay \u0111\u1ed5i v\u00e0i l\u1ea7n m\u1ed7i ph\u00fat, nh\u01b0ng ho\u00e0n to\u00e0n v\u00f4 d\u1ee5ng \u0111\u1ed1i v\u1edbi b\u1ea5t k\u1ef3 \u1ee9ng d\u1ee5ng \u0111\u1ebfm nhanh n\u00e0o. C\u00e1c k\u1ef9 s\u01b0 \u1ee9ng d\u1ee5ng c\u1ee7a DigiKey l\u01b0u \u00fd r\u1eb1ng khi \u0111\u1eb7t h\u00e0ng sai linh ki\u1ec7n \u0111\u1ea7u ra, \u201cs\u1ebd t\u1ed1n r\u1ea5t nhi\u1ec1u c\u00f4ng s\u1ee9c \u0111\u1ec3 thi\u1ebft b\u1ecb ho\u1ea1t \u0111\u1ed9ng \u0111\u01b0\u1ee3c\u201d. N\u1ed7 l\u1ef1c n\u00e0y th\u01b0\u1eddng k\u1ebft th\u00fac b\u1eb1ng vi\u1ec7c b\u1ed9 chuy\u1ec3n \u0111\u1ed5i b\u1ecb h\u1ecfng ho\u1eb7c c\u1ea3m bi\u1ebfn b\u1ecb c\u1ea5t l\u1ea1i v\u00e0o h\u1ed9p. N\u1ebfu m\u00e1y m\u00f3c s\u1ebd ho\u1ea1t \u0111\u1ed9ng trong nhi\u1ec1u n\u0103m v\u1edbi c\u1ea3m bi\u1ebfn n\u00e0y, m\u00e3 s\u1ea3n ph\u1ea9m ch\u00ednh x\u00e1c s\u1ebd r\u1ebb h\u01a1n b\u1ea5t k\u1ef3 b\u1ed9 chuy\u1ec3n \u0111\u1ed5i th\u00f4ng minh n\u00e0o. H\u00e3y d\u00e0nh c\u00e1c gi\u1ea3i ph\u00e1p chuy\u1ec3n \u0111\u1ed5i cho kho\u1ea3ng th\u1eddi gian gi\u1eefa \u201cn\u00f3 \u0111ang h\u1ecfng\u201d v\u00e0 \u201cc\u1ea3m bi\u1ebfn \u0111\u00fang \u0111\u01b0\u1ee3c giao \u0111\u1ebfn\u201d.\u201d<\/p>\n\n<h2>D\u00e0nh cho c\u00e1c nh\u00e0 ph\u00e2n ph\u1ed1i: H\u00e3y d\u1ef1 tr\u1eef c\u1ea3 hai lo\u1ea1i, v\u00e0 h\u00e3y \u0111\u1eb7t hai c\u00e2u h\u1ecfi<\/h2>\n\n<p>M\u1ecdi tr\u01b0\u1eddng h\u1ee3p h\u1ecfng h\u00f3c n\u00eau tr\u00ean, s\u1edbm hay mu\u1ed9n, c\u0169ng s\u1ebd \u0111\u01b0\u1ee3c \u0111\u01b0a \u0111\u1ebfn qu\u1ea7y c\u1ee7a nh\u00e0 ph\u00e2n ph\u1ed1i. Ng\u01b0\u1eddi am hi\u1ec3u v\u1ec1 m\u00e1y m\u00f3c (b\u1ed9 ph\u1eadn b\u1ea3o tr\u00ec) v\u00e0 ng\u01b0\u1eddi \u0111\u1eb7t h\u00e0ng linh ki\u1ec7n (b\u1ed9 ph\u1eadn mua s\u1eafm) th\u01b0\u1eddng kh\u00f4ng ph\u1ea3i l\u00e0 c\u00f9ng m\u1ed9t ng\u01b0\u1eddi. Ng\u01b0\u1eddi \u0111\u1ee9ng gi\u1eefa ch\u00ednh l\u00e0 b\u1ea1n. Khi kh\u00e1ch h\u00e0ng y\u00eau c\u1ea7u \u201cc\u1ea3m bi\u1ebfn ti\u1ec7m c\u1eadn c\u1ea3m \u1ee9ng, 18 mm, NO\u201d, th\u00f4ng s\u1ed1 c\u00f2n thi\u1ebfu \u0111\u00f3 kh\u00f4ng ph\u1ea3i l\u00e0 do ng\u1eabu nhi\u00ean. Hai c\u00e2u h\u1ecfi c\u1ee7a b\u1ea1n s\u1ebd kh\u00e9p l\u1ea1i v\u00f2ng l\u1eb7p:<\/p>\n\n<div class=\"rich-card bd-reveal\">\n <p class=\"rich-card-title\"><span class=\"rich-ico\" aria-hidden=\"true\"><svg class=\"ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"m3 17 2 2 4-4\"\/><path d=\"m3 7 2 2 4-4\"\/><path d=\"M13 6h8\"\/><path d=\"M13 12h8\"\/><path d=\"M13 18h8\"\/><\/svg><\/span>Hai c\u00e2u h\u1ecfi gi\u00fap gi\u1ea3i quy\u1ebft m\u1ecdi \u0111\u01a1n h\u00e0ng NPN\/PNP<\/p>\n <ul class=\"rich-list\">\n <li><span class=\"rich-ico\" aria-hidden=\"true\"><svg class=\"ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M22 11.08V12a10 10 0 1 1-5.93-9.14\"\/><path d=\"m9 11 3 3L22 4\"\/><\/svg><\/span><span>\u0110\u1ea7u n\u1ed1i chung c\u1ee7a th\u1ebb \u0111\u1ea7u v\u00e0o c\u00f3 \u0111i\u1ec7n \u00e1p l\u00e0 bao nhi\u00eau: +24 V hay 0 V? (Kh\u00e1ch h\u00e0ng c\u00f3 th\u1ec3 tra c\u1ee9u th\u00f4ng tin n\u00e0y tr\u00ean th\u1ebb ho\u1eb7c trong h\u01b0\u1edbng d\u1eabn s\u1eed d\u1ee5ng PLC ch\u1ec9 trong m\u01b0\u1eddi gi\u00e2y.)<\/span><\/li>\n <li><span class=\"rich-ico\" aria-hidden=\"true\"><svg class=\"ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M22 11.08V12a10 10 0 1 1-5.93-9.14\"\/><path d=\"m9 11 3 3L22 4\"\/><\/svg><\/span><span>\u0110\u00e2y l\u00e0 thi\u1ebft b\u1ecb hi\u1ec7n c\u00f3 ph\u1ea3i kh\u00f4ng, v\u00e0 n\u00f3 \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t \u1edf \u0111\u00e2u? (C\u00e1c thi\u1ebft b\u1ecb s\u1ea3n xu\u1ea5t t\u1ea1i ch\u00e2u \u00c1 v\u00e0 thi\u1ebft b\u1ecb c\u0169 h\u1ea7u h\u1ebft \u0111\u1ec1u s\u1eed d\u1ee5ng c\u00f4ng ngh\u1ec7 NPN; trong khi \u0111\u00f3, c\u00e1c b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n m\u1edbi c\u1ee7a ch\u00e2u \u00c2u\/B\u1eafc M\u1ef9 h\u1ea7u h\u1ebft \u0111\u1ec1u s\u1eed d\u1ee5ng c\u00f4ng ngh\u1ec7 PNP.)<\/span><\/li>\n <\/ul>\n<\/div>\n\n<p>C\u1ea3 hai c\u00e2u h\u1ecfi n\u00e0y \u0111\u1ec1u kh\u00f4ng y\u00eau c\u1ea7u kh\u00e1ch h\u00e0ng ph\u1ea3i am hi\u1ec3u v\u1ec1 \u0111i\u1ec7n t\u1eed, v\u00e0 \u0111\u00f3 ch\u00ednh l\u00e0 l\u00fd do t\u1ea1i sao ch\u00fang c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c gi\u1ea3i quy\u1ebft ngay t\u1ea1i qu\u1ea7y. V\u00e0 h\u1ec7 qu\u1ea3 li\u00ean quan \u0111\u1ebfn vi\u1ec7c s\u1eafp x\u1ebfp h\u00e0ng h\u00f3a c\u0169ng xu\u1ea5t ph\u00e1t t\u1eeb c\u00f9ng m\u1ed9t logic:<\/p>\n\n<div class=\"rich-callout bd-reveal\">\n <p class=\"rich-callout-title\"><span class=\"rich-ico\" aria-hidden=\"true\"><svg class=\"ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M15 14c.2-1 .7-1.7 1.5-2.5 1-.9 1.5-2.2 1.5-3.5A6 6 0 0 0 6 8c0 1 .2 2.2 1.5 3.5.7.7 1.3 1.5 1.5 2.5\"\/><path d=\"M9 18h6\"\/><path d=\"M10 22h4\"\/><\/svg><\/span>T\u01b0 th\u1ebf \u0111\u1ee9ng v\u1edbi ch\u00e2n gi\u01a1 cao<\/p>\n <p>NPN kh\u00f4ng ph\u1ea3i l\u00e0 c\u00f4ng ngh\u1ec7 l\u1ed7i th\u1eddi v\u00e0 thua k\u00e9m nh\u01b0 nh\u1eefng g\u00ec lu\u1eadn \u0111i\u1ec7u \u201cPNP l\u00e0 ti\u00eau chu\u1ea9n\u201d th\u01b0\u1eddng m\u00f4 t\u1ea3. S\u1ed1 l\u01b0\u1ee3ng m\u00e1y m\u00f3c s\u1eed d\u1ee5ng c\u00f4ng ngh\u1ec7 NPN hi\u1ec7n c\u00f3 tr\u00ean th\u1ecb tr\u01b0\u1eddng s\u1eeda ch\u1eefa \u2013 t\u1eeb c\u00e1c d\u00f2ng m\u00e1y c\u0169 c\u1ee7a Nh\u1eadt B\u1ea3n \u0111\u1ebfn thi\u1ebft b\u1ecb s\u1ea3n xu\u1ea5t t\u1ea1i ch\u00e2u \u00c1 \u0111\u01b0\u1ee3c xu\u1ea5t kh\u1ea9u trong nhi\u1ec1u th\u1eadp k\u1ef7 \u2013 l\u00e0 r\u1ea5t l\u1edbn v\u00e0 s\u1ebd kh\u00f4ng bi\u1ebfn m\u1ea5t. M\u1ed9t nh\u00e0 ph\u00e2n ph\u1ed1i ph\u1ee5c v\u1ee5 kh\u00e1ch h\u00e0ng s\u1eeda ch\u1eefa m\u00e0 ch\u1ec9 nh\u1eadp h\u00e0ng PNP \u0111ang ng\u1ea7m b\u1ea3o nh\u1eefng kh\u00e1ch h\u00e0ng \u0111\u00f3 t\u00ecm \u0111\u1ebfn n\u01a1i kh\u00e1c; trong khi \u0111\u00f3, nh\u00e0 ph\u00e2n ph\u1ed1i n\u00e0o cung c\u1ea5p c\u1ea3 hai lo\u1ea1i c\u00f4ng ngh\u1ec7 n\u00e0y \u2013 v\u1edbi c\u00f9ng k\u00edch th\u01b0\u1edbc v\u1ecf v\u00e0 kho\u1ea3ng c\u00e1ch ph\u00e1t hi\u1ec7n \u2013 s\u1ebd b\u00e1n linh ki\u1ec7n thay th\u1ebf cho b\u1ea5t k\u1ef3 m\u00e1y m\u00f3c n\u00e0o \u0111\u01b0\u1ee3c mang \u0111\u1ebfn c\u1eeda h\u00e0ng.<\/p>\n<\/div>\n\n<p>Nh\u00e2n vi\u00ean b\u00e1n h\u00e0ng n\u00e0o c\u00f3 th\u1ec3 tr\u1ea3 l\u1eddi ngay l\u1eadp t\u1ee9c hai c\u00e2u h\u1ecfi n\u00e0y s\u1ebd bi\u1ebfn m\u1ed9t y\u00eau c\u1ea7u v\u1ec1 ph\u1ee5 t\u00f9ng th\u00e0nh \u0111\u01a1n \u0111\u1eb7t h\u00e0ng; c\u00f2n ng\u01b0\u1eddi n\u00e0o ch\u1ec9 nh\u00fan vai th\u00ec s\u1ebd khi\u1ebfn kh\u00e1ch h\u00e0ng chuy\u1ec3n sang truy c\u1eadp trang web c\u1ee7a \u0111\u1ed1i th\u1ee7 c\u1ea1nh tranh. Kh\u00e1ch h\u00e0ng s\u1ebd so s\u00e1nh b\u1ea1n v\u1edbi ch\u00edn nh\u00e0 b\u00e1n l\u1ebb kh\u00e1c \u0111ang b\u00e1n c\u00f9ng m\u1ed9t s\u1ea3n ph\u1ea9m c\u00f3 h\u00ecnh \u1ea3nh t\u01b0\u01a1ng t\u1ef1. C\u00e2u h\u1ecfi mang t\u00ednh \u0111\u1ecbnh h\u01b0\u1edbng k\u1ebft qu\u1ea3 ch\u00ednh l\u00e0 kho\u1ea3nh kh\u1eafc hi\u1ebfm hoi m\u00e0 ch\u00ednh chuy\u00ean m\u00f4n, ch\u1ee9 kh\u00f4ng ph\u1ea3i gi\u00e1 c\u1ea3, s\u1ebd gi\u00fap ch\u1ed1t \u0111\u01b0\u1ee3c \u0111\u01a1n h\u00e0ng.<\/p>\n\n<hr>\n\n<p><em>B\u1ea1n \u0111ang thay th\u1ebf ho\u1eb7c b\u1ed5 sung c\u1ea3m bi\u1ebfn v\u00e0 kh\u00f4ng ch\u1eafc m\u00e1y c\u1ea7n lo\u1ea1i NPN hay PNP? OMCH\u2019s <a href=\"https:\/\/www.omch.com\/vi\/product-selection\/\">h\u1ed7 tr\u1ee3 l\u1ef1a ch\u1ecdn s\u1ea3n ph\u1ea9m<\/a> t\u00ecm ki\u1ebfm c\u00e1c linh ki\u1ec7n t\u1ef1 \u0111\u1ed9ng h\u00f3a c\u00f4ng nghi\u1ec7p ph\u00f9 h\u1ee3p v\u1edbi th\u01b0\u01a1ng hi\u1ec7u, b\u1ea3n v\u1ebd ho\u1eb7c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a qu\u00fd kh\u00e1ch. Vui l\u00f2ng g\u1eedi th\u00f4ng tin chi ti\u1ebft v\u00e0 x\u00e1c nh\u1eadn lo\u1ea1i s\u1ea3n ph\u1ea9m ph\u00f9 h\u1ee3p tr\u01b0\u1edbc khi \u0111\u1eb7t h\u00e0ng.<\/em><\/p>\n\n\n<div class=\"bp-cta-end bd-reveal\">\n <p class=\"bp-cta-end-ttl\"><span class=\"rich-ico\" aria-hidden=\"true\"><svg class=\"ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M14.536 21.686a.5.5 0 0 0 .937-.024l6.5-19a.496.496 0 0 0-.635-.635l-19 6.5a.5.5 0 0 0-.024.937l7.93 3.18a2 2 0 0 1 1.112 1.11z\"\/><path d=\"m21.854 2.147-10.94 10.939\"\/><\/svg><\/span>C\u1ea7n NPN hay PNP \u2014 v\u00e0 chi\u1ebfc m\u00e1y n\u00e0o s\u1ebd quy\u1ebft \u0111\u1ecbnh?<\/p>\n <p class=\"bp-cta-end-sub\">H\u00e3y g\u1eedi cho ch\u00fang t\u00f4i th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt, m\u1eabu th\u1ebb ho\u1eb7c b\u1ea3n v\u1ebd. Qu\u00fd kh\u00e1ch s\u1ebd nh\u1eadn \u0111\u01b0\u1ee3c lo\u1ea1i \u0111\u1ea7u ra ph\u00f9 h\u1ee3p k\u00e8m theo b\u00e1o gi\u00e1.<\/p>\n <a class=\"bp-cta-end-btn\" href=\"https:\/\/www.omch.com\/vi\/contact\/\" target=\"_self\">G\u1eedi th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ea3m bi\u1ebfn c\u1ee7a b\u1ea1n<\/a>\n<\/div>\n\n<h2>T\u00e0i li\u1ec7u tham kh\u1ea3o<\/h2>\n<ol class=\"bd-refs\">\n <li>Schneider Electric. \u201c<a href=\"https:\/\/www.se.com\/us\/en\/faqs\/FA142566\/\" target=\"_blank\" rel=\"noopener\">S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa PNP v\u00e0 NPN khi m\u00f4 t\u1ea3 k\u1ebft n\u1ed1i c\u1ea3m bi\u1ebfn 3 d\u00e2y l\u00e0 g\u00ec?<\/a>\u201d C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p FA142566.<\/li>\n <li>DigiKey. \u201c<a href=\"https:\/\/forum.digikey.com\/t\/which-do-you-love-more-npn-or-pnp\/51317\" target=\"_blank\" rel=\"noopener\">B\u1ea1n th\u00edch lo\u1ea1i n\u00e0o h\u01a1n \u2014 NPN hay PNP?<\/a>\u201d H\u01b0\u1edbng d\u1eabn th\u1ef1c h\u00e0nh v\u1ec1 T\u1ef1 \u0111\u1ed9ng h\u00f3a C\u00f4ng nghi\u1ec7p, ch\u1ee7 \u0111\u1ec1 tr\u00ean di\u1ec5n \u0111\u00e0n.<\/li>\n <li>OMCH. \u201c<a href=\"https:\/\/www.omch.com\/vi\/product-selection\/\" target=\"_blank\" rel=\"noopener\">L\u1ef1a ch\u1ecdn s\u1ea3n ph\u1ea9m<\/a>.\u201d T\u00ecm ki\u1ebfm theo th\u01b0\u01a1ng hi\u1ec7u\/m\u1eabu m\u00e3, b\u1ea3n v\u1ebd ho\u1eb7c m\u1eabu s\u1ea3n ph\u1ea9m.<\/li>\n <li>OMCH. \u201c<a href=\"https:\/\/www.omch.com\/vi\/sensor-switches\/\" target=\"_blank\" rel=\"noopener\">C\u00f4ng t\u1eafc c\u1ea3m bi\u1ebfn<\/a>.\u201d D\u00f2ng s\u1ea3n ph\u1ea9m c\u1ea3m bi\u1ebfn ti\u1ec7m c\u1eadn v\u00e0 quang \u0111i\u1ec7n.<\/li>\n <li>OMCH. \u201c<a href=\"https:\/\/www.omch.com\/vi\/\" target=\"_blank\" rel=\"noopener\">Trang ch\u1ee7<\/a>.\u201d<\/li>\n<\/ol>\n\n<\/article>\n<\/div>\n\n<\/body>\n<\/html>","protected":false},"excerpt":{"rendered":"<p>\u0110\u1ea7u ra c\u1ea3m bi\u1ebfn NPN v\u00e0 PNP: Lo\u1ea1i n\u00e0o th\u1ef1c s\u1ef1 ph\u00f9 h\u1ee3p v\u1edbi b\u1ea1n? C\u1ea3m bi\u1ebfn thay th\u1ebf \u0111ang n\u1eb1m tr\u00ean b\u00e0n l\u00e0m vi\u1ec7c c\u1ee7a b\u1ea1n. V\u1ecf c\u1ea3m bi\u1ebfn gi\u1ed1ng h\u1ec7t, kho\u1ea3ng c\u00e1ch ph\u00e1t hi\u1ec7n gi\u1ed1ng h\u1ec7t, ba d\u00e2y d\u1eabn c\u0169ng gi\u1ed1ng h\u1ec7t \u2014 n\u00e2u, xanh d\u01b0\u01a1ng, \u0111en \u2014 nh\u01b0ng m\u00e1y v\u1eabn kh\u00f4ng nh\u1eadn di\u1ec7n \u0111\u01b0\u1ee3c n\u00f3. Trong qu\u00e1 tr\u00ecnh \u0111\u1eb7t h\u00e0ng, c\u00f3 m\u1ed9t c\u00e2u h\u1ecfi \u0111\u00e3 b\u1ecb b\u1ecf qua: NPN hay PNP? \u0110\u00e2y l\u00e0 sai l\u1ea7m r\u1ebb ti\u1ec1n nh\u1ea5t trong [\u2026]<\/p>","protected":false},"author":4,"featured_media":12184,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_seopress_robots_primary_cat":"none","_seopress_titles_title":"NPN vs. PNP Sensors: Key Differences & Wiring","_seopress_titles_desc":"Compare NPN and PNP sensor outputs, wiring and PLC compatibility. Learn how sourcing and sinking signals work and choose the right sensor.","_seopress_robots_index":"","footnotes":""},"categories":[79],"tags":[],"class_list":["post-12178","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mmlblog"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/posts\/12178","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/comments?post=12178"}],"version-history":[{"count":1,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/posts\/12178\/revisions"}],"predecessor-version":[{"id":12185,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/posts\/12178\/revisions\/12185"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/media\/12184"}],"wp:attachment":[{"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/media?parent=12178"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/categories?post=12178"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/tags?post=12178"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}

{"id":12178,"date":"2026-09-07T03:22:21","date_gmt":"2026-09-07T03:22:21","guid":{"rendered":"https:\/\/www.omch.com\/?p=12178"},"modified":"2026-09-07T03:22:22","modified_gmt":"2026-09-07T03:22:22","slug":"npn-vs-pnp-sensor","status":"publish","type":"post","link":"https:\/\/www.omch.com\/vi\/npn-vs-pnp-sensor\/","title":{"rendered":"\u0110\u1ea7u ra c\u1ea3m bi\u1ebfn NPN v\u00e0 PNP: Lo\u1ea1i n\u00e0o th\u1ef1c s\u1ef1 ph\u00f9 h\u1ee3p v\u1edbi b\u1ea1n?"},"content":{"rendered":"\n\n\n\n\n\u0110\u1ea7u ra c\u1ea3m bi\u1ebfn NPN v\u00e0 PNP: Lo\u1ea1i n\u00e0o th\u1ef1c s\u1ef1 ph\u00f9 h\u1ee3p v\u1edbi b\u1ea1n?<\/title>\n<\/head>\n<body>\n\n<div class=\"bd-post\">\n<style>\n\/* fonts: BLOG scope only \u2014 copied verbatim from the brand Standard Blog CSS Header. *\/\n@import url('https:\/\/fonts.googleapis.com\/css2?family=Manrope:wght@400;600;700&family=Roboto:wght@600;700&display=swap');\n\n.bd-post {\n \/* ---- color tokens: OMCH v4 palette (plan palette \u2014 single source of hex) ---- *\/\n --body-bg: #FFFFFF;\n --text-primary: #333333;\n --text-secondary: #6E6E6E;\n --heading-ink: #000000;\n --accent: #479DE2;\n --accent-text: #2A76B4;\n --accent-hot: #FD9649;\n --navy: #0D3972;\n --inverse-bg: #1E1E1E;\n --inverse-text: #FFFFFF;\n --inverse-text-secondary: #B0B0B0;\n --card-fill: #F4F8FC;\n --card-border: #E0E0E0;\n --divider: #C0C0C0;\n --panel-fill: #FAFAFA;\n --btn-white: #FFFFFF;\n --btn-ink: #1E1E1E;\n \/* ---- layout ---- *\/\n --prose-width: 720px;\n --gap-attach: 16px;\n --gap-normal: 32px;\n --gap-section: 48px;\n --pad-standard: 24px;\n\n font-family: \"Manrope\", sans-serif;\n font-size: 16px;\n font-weight: 400;\n line-height: 1.6;\n color: var(--text-primary);\n background: var(--body-bg);\n padding: 40px;\n max-width: 100%;\n box-sizing: border-box;\n}\n.bd-post a { overflow-wrap: anywhere; word-break: break-word; }\n.bd-post p, .bd-post li { overflow-wrap: break-word; }\n.bd-post .bd-post-article { max-width: var(--prose-width); margin: 0 auto; }\n.bd-post [class*=\"bp-\"] { box-sizing: border-box; }\n\n\/* ---- prose spacing: fixed standard ---- *\/\n.bd-post p { margin: 0 0 1em; }\n.bd-post h1 { font-family: \"Roboto\", sans-serif; font-weight: 600; font-size: 34px; line-height: 1.2; color: var(--heading-ink); margin: 0 0 16px; }\n.bd-post h2 { font-family: \"Roboto\", sans-serif; font-weight: 700; font-size: 34px; line-height: 1.2; color: var(--heading-ink); margin: 48px 0 16px; }\n.bd-post h3 { font-family: \"Roboto\", sans-serif; font-weight: 700; font-size: 24px; line-height: 1.25; color: var(--heading-ink); margin: 32px 0 12px; }\n.bd-post h4 { font-weight: 600; line-height: 1.2; margin: 24px 0 8px; }\n.bd-post ul, .bd-post ol { margin: 0 0 1em; padding-left: 1.5em; }\n.bd-post li { margin-bottom: 0.5em; }\n.bd-post li::marker { color: var(--accent-text); }\n.bd-post strong { font-weight: 700; }\n.bd-post em { font-style: italic; }\n.bd-post hr { border: 0; height: 1px; background: var(--divider); margin: 40px 0; }\n\n\/* ---- links: anchor permit-list (visual props only on content forms) ---- *\/\n.bd-post p a, .bd-post li a, .bd-post blockquote a, .bd-post td a {\n color: var(--accent-text);\n font-weight: 500;\n text-decoration: underline;\n text-decoration-color: var(--accent-text);\n text-underline-offset: 2px;\n text-decoration-thickness: 1px;\n}\n\n\/* ---- shared icon ---- *\/\n.bd-post .ico { display: inline-flex; flex: none; width: 18px; height: 18px; }\n.bd-post .ico-lg { width: 24px; height: 24px; }\n\n\/* ---- rich elements ---- *\/\n\/* Comparison tables *\/\n.bd-post .table-wrapper { overflow-x: auto; border: 1px solid var(--card-border); border-radius: 8px; margin: 0 0 1em; }\n.bd-post .rich-table-title { margin: 0 0 8px; font-family: \"Roboto\", sans-serif; font-weight: 600; font-size: 18px; color: var(--heading-ink); }\n.bd-post .rich-table { width: 100%; border-collapse: collapse; background: var(--body-bg); }\n.bd-post .rich-table th { background: var(--panel-fill); color: var(--text-primary); font-family: \"Roboto\", sans-serif; font-weight: 600; font-size: 15px; text-align: left; padding: 12px 16px; border-bottom: 2px solid var(--accent-text); white-space: nowrap; }\n.bd-post .rich-table td { color: var(--text-primary); font-size: 15px; padding: 12px 16px; border-bottom: 1px solid var(--divider); vertical-align: top; }\n.bd-post .rich-table tr:last-child td { border-bottom: 0; }\n.bd-post .rich-table tbody tr:hover td:first-child { color: var(--accent-text); }\n\n\/* Callouts (warning \/ info \/ highlight) *\/\n.bd-post .rich-callout {\n background: var(--card-fill);\n border: 1px solid var(--card-border);\n border-left: 4px solid var(--accent);\n border-radius: 0 10px 10px 0;\n padding: var(--pad-standard);\n margin: var(--gap-normal) 0;\n}\n.bd-post .rich-callout-title {\n display: block;\n font-family: \"Roboto\", sans-serif;\n font-weight: 600;\n font-size: 18px;\n color: var(--heading-ink);\n margin: 0 0 6px;\n}\n.bd-post .rich-callout-title .rich-ico { display: inline-flex; vertical-align: -0.2em; margin-right: 8px; color: var(--accent-text); width: 18px; height: 18px; }\n.bd-post .rich-callout p:last-child { margin-bottom: 0; }\n\n\/* Checklist \/ Steps cards *\/\n.bd-post .rich-card {\n background: var(--card-fill);\n border: 1px solid var(--card-border);\n border-radius: 10px;\n padding: var(--pad-standard);\n margin: var(--gap-normal) 0;\n}\n.bd-post .rich-card-title {\n display: block;\n font-family: \"Roboto\", sans-serif;\n font-weight: 600;\n font-size: 18px;\n color: var(--heading-ink);\n margin: 0 0 12px;\n}\n.bd-post .rich-card-title .rich-ico { display: inline-flex; vertical-align: -0.2em; margin-right: 8px; color: var(--accent-text); width: 18px; height: 18px; }\n.bd-post .rich-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 12px; }\n.bd-post .rich-list li { display: flex; align-items: flex-start; gap: 10px; margin: 0; }\n.bd-post .rich-list .rich-ico { color: var(--accent-text); margin-top: 2px; }\n.bd-post .rich-steps { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 14px; }\n.bd-post .rich-steps li { display: flex; align-items: flex-start; gap: 12px; margin: 0; }\n.bd-post .chip {\n display: inline-flex; align-items: center; justify-content: center;\n min-width: 24px; height: 24px; padding: 0 6px;\n background: var(--accent-text); color: var(--inverse-text);\n font-family: \"Roboto\", sans-serif; font-weight: 700; font-size: 13px;\n border-radius: 6px; flex: none;\n}\n.bd-post .rich-steps .chip { margin-top: 1px; }\n\n\/* ---- designed BPs ---- *\/\n.bd-post .bp-1-hook {\n background: var(--inverse-bg);\n border-radius: 10px;\n padding: var(--pad-standard);\n margin: var(--gap-attach) 0 var(--gap-normal);\n display: flex; align-items: flex-start; gap: 16px;\n}\n.bd-post .bp-1-icon {\n width: 44px; height: 44px; border-radius: 22px; flex: none;\n border: 1px solid var(--accent);\n display: inline-flex; align-items: center; justify-content: center;\n color: var(--accent-hot);\n}\n.bd-post .bp-1-body { display: flex; flex-direction: column; gap: 6px; min-width: 0; }\n.bd-post .bp-1-title { font-family: \"Roboto\", sans-serif; font-weight: 600; font-size: 20px; line-height: 1.3; color: var(--inverse-text); margin: 0; }\n.bd-post .bp-1-lines { font-size: 16px; color: var(--inverse-text-secondary); margin: 0; }\n\n.bd-post .bp-cta-mid {\n background: var(--card-fill);\n border: 1px solid var(--card-border);\n border-radius: 10px;\n padding: var(--pad-standard);\n margin: var(--gap-normal) 0;\n display: flex; flex-direction: column; gap: 10px; align-items: flex-start;\n}\n.bd-post .bp-cta-mid-ttl {\n display: block;\n font-family: \"Roboto\", sans-serif; font-weight: 600; font-size: 20px; color: var(--heading-ink);\n margin: 0;\n}\n.bd-post .bp-cta-mid-ttl .rich-ico { display: inline-flex; vertical-align: -0.2em; margin-right: 8px; color: var(--accent-text); width: 20px; height: 20px; }\n.bd-post .bp-cta-mid-copy { margin: 0; }\n.bd-post .bp-cta-mid-btn {\n display: inline-flex; align-items: center; gap: 8px;\n background: var(--navy); color: var(--btn-white);\n font-family: \"Roboto\", sans-serif; font-weight: 600; font-size: 15px;\n text-decoration: none; padding: 10px 20px; border-radius: 6px;\n}\n\n.bd-post .bp-3-pn {\n background: var(--card-fill);\n border: 1px solid var(--card-border);\n border-radius: 10px;\n padding: var(--pad-standard);\n margin: var(--gap-section) 0;\n}\n.bd-post .bp-3-title { display: block; font-family: \"Roboto\", sans-serif; font-weight: 600; font-size: 18px; color: var(--heading-ink); margin: 0 0 14px; }\n.bd-post .bp-3-title .rich-ico { display: inline-flex; vertical-align: -0.2em; margin-right: 8px; color: var(--accent-text); width: 18px; height: 18px; }\n.bd-post .bp-3-grid { display: grid; grid-template-columns: repeat(2, 1fr); }\n.bd-post .bp-3-cell { display: flex; align-items: flex-start; gap: 12px; padding: 4px 0; }\n.bd-post .bp-3-cell + .bp-3-cell { border-left: 1px solid var(--divider); padding-left: 20px; }\n.bd-post .bp-3-chip {\n display: inline-flex; align-items: center; justify-content: center;\n width: 40px; height: 32px; flex: none;\n background: var(--accent-text); color: var(--inverse-text);\n font-family: \"Roboto\", sans-serif; font-weight: 700; font-size: 16px;\n border-radius: 6px;\n}\n.bd-post .bp-3-cellcopy { display: flex; flex-direction: column; gap: 2px; }\n.bd-post .bp-3-celllabel { font-family: \"Roboto\", sans-serif; font-weight: 700; font-size: 15px; color: var(--heading-ink); margin: 0; }\n.bd-post .bp-3-cellsub { font-size: 14px; color: var(--text-secondary); margin: 0; }\n.bd-post .bp-3-foot { margin: 12px 0 0; font-size: 14px; color: var(--text-secondary); }\n\n.bd-post .bp-2-fault {\n background: var(--card-fill);\n border: 1px solid var(--card-border);\n border-radius: 10px;\n padding: var(--pad-standard);\n margin: var(--gap-normal) 0;\n}\n.bd-post .bp-2-title { display: block; font-family: \"Roboto\", sans-serif; font-weight: 600; font-size: 18px; color: var(--heading-ink); margin: 0 0 14px; }\n.bd-post .bp-2-title .rich-ico { display: inline-flex; vertical-align: -0.2em; margin-right: 8px; color: var(--accent-text); width: 18px; height: 18px; }\n.bd-post .bp-2-grid { display: grid; grid-template-columns: repeat(2, 1fr); }\n.bd-post .bp-2-cell { display: flex; flex-direction: column; gap: 6px; }\n.bd-post .bp-2-cell + .bp-2-cell { border-left: 1px solid var(--divider); padding-left: 20px; }\n.bd-post .bp-2-celllabel .cell-ico { display: inline-flex; vertical-align: -0.2em; margin-right: 8px; width: 20px; height: 20px; color: var(--accent-text); }\n.bd-post .bp-2-celllabel { font-family: \"Roboto\", sans-serif; font-weight: 700; font-size: 16px; color: var(--heading-ink); margin: 0; }\n.bd-post .bp-2-cellline { font-size: 15px; color: var(--text-primary); margin: 0; }\n\n.bd-post .bp-cta-end {\n background: var(--navy);\n border-radius: 10px;\n padding: var(--pad-standard);\n margin: var(--gap-section) 0;\n display: flex; flex-direction: column; gap: 10px; align-items: flex-start;\n}\n.bd-post .bp-cta-end-ttl { display: block; font-family: \"Roboto\", sans-serif; font-weight: 600; font-size: 22px; line-height: 1.3; color: var(--inverse-text); margin: 0; }\n.bd-post .bp-cta-end-ttl .rich-ico { display: inline-flex; vertical-align: -0.2em; margin-right: 8px; color: var(--accent-hot); width: 22px; height: 22px; }\n.bd-post .bp-cta-end-sub { font-size: 16px; color: var(--inverse-text-secondary); margin: 0; max-width: 34em; }\n.bd-post .bp-cta-end-btn {\n display: inline-flex; align-items: center; gap: 8px;\n background: var(--accent-hot); color: var(--btn-ink);\n font-family: \"Roboto\", sans-serif; font-weight: 600; font-size: 15px;\n text-decoration: none; padding: 10px 20px; border-radius: 6px;\n}\n\n\/* ---- sanctioned motion ---- *\/\n@media (prefers-reduced-motion: no-preference) {\n @supports (animation-timeline: view()) {\n .bd-post .bd-reveal { animation: bd-fade-in linear both; animation-timeline: view(); animation-range: entry 0% entry 35%; }\n @keyframes bd-fade-in { from { opacity: 0; } to { opacity: 1; } }\n }\n .bd-post h2 { transition: color .2s ease-out, transform .2s ease-out; }\n .bd-post h2:hover { color: var(--accent-text); transform: scale(1.01); }\n .bd-post .bd-post-article a { transition: color .2s ease-out; }\n .bd-post p a:hover, .bd-post li a:hover, .bd-post blockquote a:hover, .bd-post td a:hover { color: var(--heading-ink); }\n .bd-post .rich-card, .bd-post .rich-callout, .bd-post .bp-3-pn, .bd-post .bp-2-fault { transition: transform .2s ease-out, box-shadow .2s ease-out; }\n .bd-post .rich-card:hover, .bd-post .rich-callout:hover, .bd-post .bp-3-pn:hover, .bd-post .bp-2-fault:hover { transform: translateY(-2px); box-shadow: 0 6px 18px rgba(0,0,0,0.08); }\n .bd-post .bp-cta-mid-btn { transition: background .2s ease-out, color .2s ease-out, transform .2s ease-out, box-shadow .2s ease-out; }\n .bd-post .bp-cta-mid-btn:hover { background: var(--accent-text); color: var(--btn-white); transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,0,0,0.18); }\n .bd-post .bp-cta-end-btn { transition: background .2s ease-out, color .2s ease-out, transform .2s ease-out, box-shadow .2s ease-out; }\n .bd-post .bp-cta-end-btn:hover { background: var(--btn-white); color: var(--btn-ink); transform: translateY(-2px); box-shadow: 0 4px 14px rgba(0,0,0,0.25); }\n}\n\n\/* ---- mobile ---- *\/\n@media (max-width: 768px) {\n .bd-post { padding: 16px; }\n .bd-post h1 { font-size: 22px; }\n .bd-post h2 { font-size: 26px; margin-top: 32px; }\n .bd-post h3 { font-size: 20px; margin-top: 24px; }\n .bd-post .bp-1-title { font-size: 20px; }\n .bd-post .bp-3-grid { grid-template-columns: 1fr; }\n .bd-post .bp-3-cell + .bp-3-cell { border-left: 0; border-top: 1px solid var(--divider); padding-left: 0; padding-top: 14px; }\n .bd-post .bp-2-grid { grid-template-columns: 1fr; }\n .bd-post .bp-2-cell + .bp-2-cell { border-left: 0; border-top: 1px solid var(--divider); padding-left: 0; padding-top: 14px; }\n}\n\n\/* ---- References (canonical .bd-refs) ---- *\/\n.bd-post .bd-refs { margin: 0 0 1em; padding-left: 1.6em; }\n.bd-post .bd-refs li { font-size: 14px; line-height: 1.7; color: var(--text-secondary, #6E6E6E); margin-bottom: 10px; overflow-wrap: anywhere; }\n.bd-post .bd-refs li::marker { color: var(--accent-deep, #2A76B4); }\n.bd-post .bd-refs li a { color: var(--accent-deep, #2A76B4); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; overflow-wrap: anywhere; }\n.bd-post .bd-refs li a:hover { color: var(--heading-ink, #000000); text-decoration-thickness: 2px; }\n<\/style>\n<article class=\"bd-post-article\">\n\n<p>C\u1ea3m bi\u1ebfn thay th\u1ebf \u0111ang n\u1eb1m tr\u00ean b\u00e0n l\u00e0m vi\u1ec7c c\u1ee7a b\u1ea1n. V\u1ecf c\u1ea3m bi\u1ebfn gi\u1ed1ng h\u1ec7t, kho\u1ea3ng c\u00e1ch ph\u00e1t hi\u1ec7n c\u0169ng gi\u1ed1ng, ba s\u1ee3i d\u00e2y c\u0169ng gi\u1ed1ng \u2013 n\u00e2u, xanh d\u01b0\u01a1ng, \u0111en \u2013 nh\u01b0ng m\u00e1y v\u1eabn kh\u00f4ng nh\u1eadn di\u1ec7n \u0111\u01b0\u1ee3c n\u00f3. Trong qu\u00e1 tr\u00ecnh trao \u0111\u1ed5i v\u1ec1 \u0111\u01a1n h\u00e0ng, c\u00f3 m\u1ed9t c\u00e2u h\u1ecfi \u0111\u00e3 b\u1ecb b\u1ecf qua: <em>NPN hay PNP?<\/em><\/p>\n\n<p>\u0110\u00e2y l\u00e0 sai l\u1ea7m r\u1ebb ti\u1ec1n nh\u1ea5t trong l\u0129nh v\u1ef1c c\u1ea3m bi\u1ebfn c\u00f4ng nghi\u1ec7p, nh\u01b0ng chi ph\u00ed ph\u1ea3i tr\u1ea3 l\u1ea1i cao h\u01a1n c\u1ea3 gi\u00e1 c\u1ee7a ch\u00ednh chi\u1ebfc c\u1ea3m bi\u1ebfn. Vi\u1ec7c ch\u1ecdn sai lo\u1ea1i \u0111\u1ea7u ra s\u1ebd d\u1eabn \u0111\u1ebfn t\u00ecnh tr\u1ea1ng kh\u00f4ng c\u00f3 t\u00edn hi\u1ec7u, ph\u1ea3i thay th\u1ebb, \u0111\u1eb7t h\u00e0ng l\u1ea1i v\u00e0, n\u1ebfu kh\u00f4ng ai ph\u00e1t hi\u1ec7n k\u1ecbp th\u1eddi, quy tr\u00ecnh s\u1ea3n xu\u1ea5t s\u1ebd g\u1eb7p s\u1ef1 c\u1ed1 theo c\u00e1ch t\u1ed3i t\u1ec7 nh\u1ea5t c\u00f3 th\u1ec3. H\u01b0\u1edbng d\u1eabn n\u00e0y s\u1ebd \u0111\u1ec1 c\u1eadp \u0111\u1ebfn ba vi\u1ec7c c\u1ee5 th\u1ec3 m\u00e0 b\u1ea1n th\u1ef1c s\u1ef1 c\u1ea7n th\u1ef1c hi\u1ec7n. <strong>X\u00e1c \u0111\u1ecbnh<\/strong> lo\u1ea1i \u0111\u1ea7u ra n\u00e0o \u0111ang hi\u1ec7n ra tr\u01b0\u1edbc m\u1eaft b\u1ea1n, <strong>ch\u1ecdn<\/strong> lo\u1ea1i m\u00e0 m\u00e1y c\u1ee7a b\u1ea1n c\u1ea7n, v\u00e0 <strong>ch\u1ec9 \u0111\u1ecbnh<\/strong> \u0111\u1ec3 \u0111\u01a1n h\u00e0ng ti\u1ebfp theo \u0111\u01b0\u1ee3c giao \u0111\u00fang ngay t\u1eeb l\u1ea7n \u0111\u1ea7u ti\u00ean.<\/p>\n\n<h2>\u0110\u1ea7u ra c\u1ea3m bi\u1ebfn NPN v\u00e0 PNP l\u00e0 g\u00ec? G\u00f3c nh\u00ecn t\u1eeb m\u1ea1ch \u0111i\u1ec7n<\/h2>\n\n<p>H\u00e3y t\u1ea1m g\u00e1c l\u1ea1i v\u1ea5n \u0111\u1ec1 v\u1eadt l\u00fd c\u1ee7a b\u00f3ng b\u00e1n d\u1eabn sang m\u1ed9t b\u00ean. B\u00ean trong m\u1ed9t c\u1ea3m bi\u1ebfn DC 3 d\u00e2y, m\u1ed9t b\u00f3ng b\u00e1n d\u1eabn \u0111\u00f3ng vai tr\u00f2 nh\u01b0 m\u1ed9t <strong>c\u00f4ng t\u1eafc<\/strong>. V\u1ea5n \u0111\u1ec1 v\u1ec1 NPN\/PNP n\u00f3i chung ch\u1ec9 \u0111\u01a1n gi\u1ea3n l\u00e0 nh\u01b0 sau: <em>C\u00f4ng t\u1eafc n\u1eb1m \u1edf ph\u00eda n\u00e0o c\u1ee7a m\u1ea1ch \u0111i\u1ec7n?<\/em><\/p>\n\n<ul>\n<li>A <strong>PNP<\/strong> C\u1ea3m bi\u1ebfn k\u00edch ho\u1ea1t c\u00f4ng t\u1eafc tr\u00ean <strong>ph\u00eda cao<\/strong>: gi\u1eefa ngu\u1ed3n c\u1ea5p +24 V v\u00e0 d\u00e2y ra m\u00e0u \u0111en. Khi c\u00f3 d\u00f2ng \u0111i\u1ec7n \u0111i qua, n\u00f3 s\u1ebd \u0111\u1ea9y \u0111i\u1ec7n \u00e1p +24 V ra kh\u1ecfi d\u00e2y m\u00e0u \u0111en. D\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua <em>ra<\/em> c\u1ee7a c\u1ea3m bi\u1ebfn.<\/li>\n<li>M\u1ed9t <strong>NPN<\/strong> C\u1ea3m bi\u1ebfn k\u00edch ho\u1ea1t c\u00f4ng t\u1eafc tr\u00ean <strong>ph\u00eda d\u01b0\u1edbi<\/strong>: gi\u1eefa d\u00e2y \u0111\u1ea7u ra m\u00e0u \u0111en v\u00e0 0 V. Khi d\u1eabn \u0111i\u1ec7n, n\u00f3 s\u1ebd k\u00e9o \u0111i\u1ec7n \u00e1p c\u1ee7a d\u00e2y m\u00e0u \u0111en xu\u1ed1ng 0 V. D\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua <em>v\u00e0o<\/em> c\u1ea3m bi\u1ebfn.<\/li>\n<\/ul>\n\n<p>T\u1ea3i (\u0111\u1ea7u v\u00e0o PLC, cu\u1ed9n d\u00e2y r\u01a1le, b\u1ed9 \u0111\u1ebfm) lu\u00f4n n\u1eb1m \u1edf ph\u00eda \u0111\u1ed1i di\u1ec7n v\u1edbi c\u00f4ng t\u1eafc. \u0110\u00f3 l\u00e0 l\u00fd do t\u1ea1i sao c\u1ea3m bi\u1ebfn PNP \u201cph\u00e1t ra 24 V\u201d c\u00f2n c\u1ea3m bi\u1ebfn NPN \u201cph\u00e1t ra 0 V\u201d: m\u1ed7i lo\u1ea1i ch\u1ec9 c\u1ea7n k\u1ebft n\u1ed1i \u0111\u1ea7u ra c\u1ee7a m\u00ecnh v\u1edbi \u0111\u01b0\u1eddng ngu\u1ed3n m\u00e0 c\u00f4ng t\u1eafc c\u1ee7a n\u00f3 ti\u1ebfp x\u00fac.<\/p>\n\n\n<div class=\"bp-1-hook bd-reveal\">\n <div class=\"bp-1-icon\" aria-hidden=\"true\">\n <svg class=\"ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><circle cx=\"15\" cy=\"12\" r=\"3\"\/><rect width=\"20\" height=\"14\" x=\"2\" y=\"5\" rx=\"7\"\/><\/svg>\n <\/div>\n <div class=\"bp-1-body\">\n <p class=\"bp-1-title\">M\u1ed9t c\u00e2u gi\u1ea3i th\u00edch \u0111\u01b0\u1ee3c m\u1ecdi c\u00e2u h\u1ecfi v\u1ec1 NPN\/PNP<\/p>\n <p class=\"bp-1-lines\">Transistor PNP \u0111i\u1ec1u khi\u1ec3n c\u1ef1c d\u01b0\u01a1ng c\u1ee7a m\u1ea1ch. Transistor NPN \u0111i\u1ec1u khi\u1ec3n c\u1ef1c \u00e2m. Vi\u1ec7c \u0111o \u0111\u1ea1c, x\u1eed l\u00fd s\u1ef1 c\u1ed1 v\u00e0 l\u1ef1a ch\u1ecdn s\u1ea3n ph\u1ea9m \u0111\u1ec1u ph\u1ee5 thu\u1ed9c v\u00e0o v\u1ecb tr\u00ed l\u1eafp \u0111\u1eb7t c\u1ee7a transistor.<\/p>\n <\/div>\n<\/div>\n\n<p>\u1ede c\u1ea5p \u0111\u1ed9 n\u00e0y, b\u1ea1n ch\u1ec9 c\u1ea7n bi\u1ebft ba d\u00e2y l\u00e0 \u0111\u1ee7: <strong>m\u00e0u n\u00e2u = +24 V DC, m\u00e0u xanh d\u01b0\u01a1ng = 0 V, m\u00e0u \u0111en = \u0111\u1ea7u ra \u0111i\u1ec1u khi\u1ec3n<\/strong>. Tr\u01b0\u1edbc khi \u0111i s\u00e2u h\u01a1n, c\u1ea7n l\u00e0m r\u00f5 m\u1ed9t \u0111i\u1ec3m quan tr\u1ecdng: v\u1ea5n \u0111\u1ec1 NPN\/PNP n\u00e0y ch\u1ec9 \u00e1p d\u1ee5ng cho c\u00e1c \u0111\u1ea7u ra b\u00e1n d\u1eabn tr\u00ean c\u1ea3m bi\u1ebfn d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u (DC). C\u1ea3m bi\u1ebfn d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u (AC) hai d\u00e2y v\u00e0 c\u00e1c c\u00f4ng t\u1eafc ti\u1ebfp \u0111i\u1ec3m c\u01a1 h\u1ecdc (c\u00f4ng t\u1eafc gi\u1edbi h\u1ea1n, c\u00f4ng t\u1eafc vi m\u00f4) kh\u00f4ng ph\u00e2n bi\u1ec7t lo\u1ea1i b\u00f3ng b\u00e1n d\u1eabn \u0111\u1ea7u ra. C\u00f4ng t\u1eafc v\u1eabn ch\u1ec9 l\u00e0 c\u00f4ng t\u1eafc, v\u00e0 c\u1ee5m t\u1eeb \u201cc\u00f4ng t\u1eafc gi\u1edbi h\u1ea1n NPN\u201d l\u00e0 \u0111i\u1ec1u b\u1ea1n s\u1ebd kh\u00f4ng bao gi\u1edd c\u1ea7n ph\u1ea3i s\u1eed d\u1ee5ng.<\/p>\n\n\n<div style=\"margin:32px 0; padding:20px; background:#EAF3FB; border:1px solid #D3D3D3; border-radius:12px;\">\n <p style=\"margin:0 0 12px; font-family:'Roboto',sans-serif; font-size:18px; font-weight:700; line-height:1.35; color:#0D3972;\">\n Xem: Gi\u1ea3i th\u00edch v\u1ec1 \u0111\u1ea7u ra c\u1ee7a c\u1ea3m bi\u1ebfn PNP v\u00e0 NPN\n <\/p>\n\n <div style=\"position:relative; width:100%; aspect-ratio:16 \/ 9; overflow:hidden; border-radius:8px; background:#000;\">\n <iframe\n src=\"https:\/\/www.youtube-nocookie.com\/embed\/uTC_ZsZu84k?rel=0\"\n title=\"PNP so v\u1edbi NPN: S\u1ef1 kh\u00e1c bi\u1ec7t l\u00e0 g\u00ec?\"\n loading=\"lazy\"\n style=\"position:absolute; inset:0; width:100%; height:100%; border:0;\"\n allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\"\n referrerpolicy=\"strict-origin-when-cross-origin\"\n allowfullscreen>\n <\/iframe>\n <\/div>\n\n <p style=\"margin:12px 0 0; font-size:14px; line-height:1.5; color:#6E6E6E;\">\n M\u1ed9t l\u1eddi gi\u1ea3i th\u00edch tr\u1ef1c quan ng\u1eafn g\u1ecdn v\u1ec1 \u0111\u1ea7u ra c\u1ea3m bi\u1ebfn ki\u1ec3u ngu\u1ed3n (PNP) v\u00e0 ki\u1ec3u ch\u00ecm (NPN).\n <\/p>\n<\/div>\n\n<h2>To\u00e0n b\u1ed9 c\u00e1c lo\u1ea1i c\u1ea5u tr\u00fac \u0111\u1ea7u ra: PNP, NPN, Push-Pull v\u00e0 4 d\u00e2y<\/h2>\n\n<p>NPN v\u00e0 PNP kh\u00f4ng ph\u1ea3i l\u00e0 hai phe \u0111\u1ed1i l\u1eadp; ch\u00fang l\u00e0 hai gi\u00e1 tr\u1ecb ph\u1ed5 bi\u1ebfn nh\u1ea5t trong m\u1ed9t d\u1ea3i c\u00e1c c\u1ea5u tr\u00fac \u0111\u1ea7u ra. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 to\u00e0n b\u1ed9 d\u1ea3i \u0111\u00f3. M\u1ed9t trong nh\u1eefng h\u00e0ng \u00edt \u0111\u01b0\u1ee3c nh\u1eafc \u0111\u1ebfn nh\u1ea5t l\u1ea1i gi\u00fap m\u1ecdi ng\u01b0\u1eddi tr\u00e1nh \u0111\u01b0\u1ee3c kh\u00f4ng \u00edt r\u1eafc r\u1ed1i:<\/p>\n\n<div class=\"rich-table-wrap bd-reveal\">\n <p class=\"rich-table-title\">C\u00e1c c\u1ea5u tr\u00fac \u0111\u1ea7u ra c\u1ee7a c\u1ea3m bi\u1ebfn DC c\u00f4ng nghi\u1ec7p<\/p>\n <div class=\"table-wrapper\">\n <table class=\"rich-table\">\n <thead>\n <tr><th>Lo\u1ea1i \u0111\u1ea7u ra<\/th><th>Khi \u0111\u01b0\u1ee3c k\u00edch ho\u1ea1t, d\u00e2y m\u00e0u \u0111en<\/th><th>Ph\u00f9 h\u1ee3p v\u1edbi<\/th><th>Th\u01b0\u1eddng th\u1ea5y trong<\/th><\/tr>\n <\/thead>\n <tbody>\n <tr><td>PNP (ngu\u1ed3n c\u1ea5p, c\u00f4ng t\u1eafc ph\u00eda cao)<\/td><td>Cung c\u1ea5p \u0111i\u1ec7n \u00e1p +24 V cho t\u1ea3i<\/td><td>\u0110\u1ea7u v\u00e0o ch\u00ecm (\u0111\u1ea7u v\u00e0o chung \u1edf m\u1ee9c 0 V)<\/td><td>C\u00e1c d\u1ef1 \u00e1n x\u00e2y d\u1ef1ng m\u1edbi tr\u00ean kh\u1eafp Hoa K\u1ef3 v\u00e0 Li\u00ean minh Ch\u00e2u \u00c2u; logic t\u00edch c\u1ef1c<\/td><\/tr>\n <tr><td>NPN (lo\u1ea1i h\u00fat, c\u00f4ng t\u1eafc ph\u00eda d\u01b0\u1edbi)<\/td><td>Gi\u1ea3m \u0111i\u1ec7n \u00e1p t\u1ea3i xu\u1ed1ng 0 V<\/td><td>Ngu\u1ed3n c\u1ea5p t\u00edn hi\u1ec7u \u0111\u1ea7u v\u00e0o (th\u1ebb \u0111\u1ea7u v\u00e0o c\u00f3 \u0111i\u1ec7n \u00e1p chung l\u00e0 +24 V)<\/td><td>C\u01a1 s\u1edf ng\u01b0\u1eddi d\u00f9ng kh\u1ed5ng l\u1ed3 \u0111\u1ed1i v\u1edbi c\u00e1c m\u00e1y m\u00f3c th\u1ebf h\u1ec7 c\u0169 \u1edf ch\u00e2u \u00c1 v\u00e0 Nh\u1eadt B\u1ea3n<\/td><\/tr>\n <tr><td>\u0110\u1ea9y-k\u00e9o<\/td><td>Lu\u00e2n phi\u00ean gi\u1eefa 24 V v\u00e0 0 V; kh\u00f4ng bao gi\u1edd \u1edf tr\u1ea1ng th\u00e1i n\u1ed5i khi t\u1eaft<\/td><td>M\u1ed9t trong hai th\u1ebb \u0111\u1ea7u v\u00e0o<\/td><td>C\u00e1c \u0111\u1ea7u ra t\u1ed1c \u0111\u1ed9 cao nh\u01b0 b\u1ed9 m\u00e3 h\u00f3a<\/td><\/tr>\n <tr><td>4 d\u00e2y, \u0111\u1ea7u ra k\u00e9p<\/td><td>M\u1ed9t d\u00e2y PNP c\u1ed9ng v\u1edbi m\u1ed9t d\u00e2y NPN<\/td><td>H\u00e3y ch\u1ecdn c\u00e1i n\u00e0o ph\u00f9 h\u1ee3p v\u1edbi t\u1ea5m thi\u1ec7p<\/td><td>Hi\u1ebfm g\u1eb7p; m\u1ed9t c\u1ea3m bi\u1ebfn h\u1ed7 tr\u1ee3 c\u1ea3 hai lo\u1ea1i th\u1ebb<\/td><\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n<\/div>\n\n<p>H\u00e3y ch\u00fa \u00fd \u0111\u1ebfn c\u1ed9t gi\u1eefa: hai thu\u1eadt ng\u1eef ph\u1ed5 bi\u1ebfn nh\u1ea5t (sourcing \/ sinking) m\u00f4 t\u1ea3 <em>c\u1ee7a c\u1ea3m bi\u1ebfn<\/em> h\u00e0nh vi, v\u00e0 \u0111\u00f3 ch\u00ednh l\u00e0 \u0111i\u1ec3m khi\u1ebfn m\u1ecdi ng\u01b0\u1eddi b\u1ed1i r\u1ed1i. C\u00e1c t\u1eeb n\u00e0y s\u1ebd \u0111\u1ea3o ng\u01b0\u1ee3c khi b\u1ea1n nh\u00ecn t\u1eeb ph\u00eda th\u1ebb \u0111\u1ea7u v\u00e0o. M\u1ed9t c\u1ea3m bi\u1ebfn PNP (lo\u1ea1i c\u1ea5p ngu\u1ed3n) k\u1ebft n\u1ed1i v\u1edbi m\u1ed9t <strong>ch\u00ecm<\/strong> Th\u1ebb \u0111\u1ea7u v\u00e0o: Ch\u1ee9c n\u0103ng c\u1ee7a th\u1ebb n\u00e0y l\u00e0 cho ph\u00e9p d\u00f2ng \u0111i\u1ec7n ch\u1ea3y v\u00e0o n\u00f3. M\u1ed9t c\u1ea3m bi\u1ebfn NPN (lo\u1ea1i ch\u00ecm) \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i v\u1edbi m\u1ed9t <strong>t\u00ecm ngu\u1ed3n cung \u1ee9ng<\/strong> th\u1ebb, l\u00e0 b\u1ed9 ph\u1eadn cung c\u1ea5p d\u00f2ng \u0111i\u1ec7n cho c\u1ea3m bi\u1ebfn. C\u1ea3m bi\u1ebfn v\u00e0 th\u1ebb lu\u00f4n m\u00f4 t\u1ea3 l\u1eabn nhau theo h\u00ecnh \u1ea3nh ph\u1ea3n chi\u1ebfu. N\u1ebfu trong b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u00f3 ghi \u201c\u0111\u1ea7u v\u00e0o PNP\u201d, h\u00e3y hi\u1ec3u \u0111\u00f3 l\u00e0 \u201c\u0111\u1ea7u v\u00e0o d\u00e0nh cho c\u1ea3m bi\u1ebfn PNP\u201d v\u00e0 ki\u1ec3m tra c\u1ef1c chung, v\u00ec ch\u00ednh c\u1ef1c n\u00e0y m\u1edbi cho b\u1ea1n bi\u1ebft th\u00f4ng tin ch\u00ednh x\u00e1c.<\/p>\n\n<p>C\u00e1c \u0111\u1ea7u ra ki\u1ec3u push-pull v\u00e0 4 d\u00e2y t\u1ed3n t\u1ea1i ch\u00ednh x\u00e1c l\u00e0 v\u00ec c\u00f3 ng\u01b0\u1eddi \u0111\u00e3 ch\u00e1n ng\u1ea5y c\u00e1i g\u01b0\u01a1ng n\u00e0y. \u0110\u1ea7u ra ki\u1ec3u push-pull ch\u1ee7 \u0111\u1ed9ng \u0111i\u1ec1u khi\u1ec3n m\u1ee9c t\u00edn hi\u1ec7u tr\u00ean \u0111\u01b0\u1eddng truy\u1ec1n l\u00ean cao ho\u1eb7c xu\u1ed1ng th\u1ea5p, n\u00ean n\u00f3 ho\u1ea1t \u0111\u1ed9ng \u0111\u01b0\u1ee3c v\u1edbi c\u1ea3 hai lo\u1ea1i th\u1ebb \u0111\u1ea7u v\u00e0o; c\u00e1c c\u1ea3m bi\u1ebfn 4 d\u00e2y c\u00f3 hai b\u00f3ng b\u00e1n d\u1eabn \u0111\u1ea7u ra v\u00e0 cung c\u1ea5p cho b\u1ea1n c\u1ea3 hai t\u00edn hi\u1ec7u c\u00f9ng m\u1ed9t l\u00fac. Ch\u00fang l\u00e0 nh\u1eefng tr\u01b0\u1eddng h\u1ee3p ngo\u1ea1i l\u1ec7, kh\u00f4ng ph\u1ea3i quy t\u1eafc chung. Quy t\u1eafc chung v\u1eabn l\u00e0: <strong>Lo\u1ea1i \u0111\u1ea7u ra l\u00e0 m\u1ed9t tham s\u1ed1 m\u00e0 b\u1ea1n ph\u1ea3i \u0111\u1eb7t t\u00ean, ch\u1ee9 kh\u00f4ng ph\u1ea3i l\u00e0 th\u00f4ng tin m\u00e0 c\u1ea3m bi\u1ebfn s\u1ebd t\u1ef1 \u0111\u1ed9ng cung c\u1ea5p.<\/strong><\/p>\n\n<h2>C\u00e1ch ki\u1ec3m tra c\u1ea3m bi\u1ebfn l\u00e0 lo\u1ea1i NPN hay PNP<\/h2>\n\n<p>N\u1ebfu b\u1ea1n \u0111ang thay th\u1ebf m\u1ed9t c\u1ea3m bi\u1ebfn tr\u00ean m\u1ed9t m\u00e1y \u0111ang ho\u1ea1t \u0111\u1ed9ng (tr\u01b0\u1eddng h\u1ee3p ph\u1ed5 bi\u1ebfn nh\u1ea5t trong th\u1ef1c t\u1ebf), b\u1ea1n s\u1ebd kh\u00f4ng ch\u1ecdn lo\u1ea1i \u0111\u1ea7u ra d\u1ef1a tr\u00ean s\u1edf th\u00edch. B\u1ea1n <em>\u0111\u1ecdc d\u1eef li\u1ec7u t\u1eeb m\u00e1y<\/em>. Ch\u1ec9 c\u1ea7n hai l\u1ea7n ki\u1ec3m tra l\u00e0 xong, theo th\u1ee9 t\u1ef1 n\u00e0y.<\/p>\n\n<h3>H\u00e3y ki\u1ec3m tra th\u1ebb \u0111\u1ea7u v\u00e0o tr\u01b0\u1edbc, ch\u1ee9 kh\u00f4ng ph\u1ea3i c\u1ea3m bi\u1ebfn<\/h3>\n\n<p>Th\u1ebb \u0111\u1ea7u v\u00e0o <strong>c\u1ed5ng chung<\/strong> \u0111\u00f3 l\u00e0 th\u00f4ng tin th\u1ef1c t\u1ebf. H\u00e3y t\u00ecm t\u1ea5m m\u1ea1ch m\u00e0 d\u00e2y c\u1ea3m bi\u1ebfn c\u1ee7a b\u1ea1n n\u1ed1i v\u00e0o v\u00e0 \u0111\u1eb7t m\u1ed9t c\u00e2u h\u1ecfi: <em>C\u1ef1c chung \u0111\u01b0\u1ee3c n\u1ed1i v\u1edbi +24 V hay 0 V?<\/em><\/p>\n\n<ul>\n<li>Th\u01b0\u1eddng \u0111i k\u00e8m v\u1edbi <strong>0 V<\/strong> \u2192 Th\u1ebb n\u00e0y l\u00e0 m\u1ed9t <strong>d\u1eef li\u1ec7u \u0111\u1ea7u v\u00e0o ch\u00ecm<\/strong> \u2192 n\u00f3 mu\u1ed1n m\u1ed9t <strong>PNP<\/strong> c\u1ea3m bi\u1ebfn (c\u1ea3m bi\u1ebfn n\u00e0y cung c\u1ea5p ngu\u1ed3n \u0111i\u1ec7n 24 V c\u1ea7n thi\u1ebft \u0111\u1ec3 b\u1ed9 c\u00e1ch ly quang c\u1ee7a th\u1ebb ho\u1ea1t \u0111\u1ed9ng).<\/li>\n<li>Th\u01b0\u1eddng \u0111i k\u00e8m v\u1edbi <strong>+24 V<\/strong> \u2192 Th\u1ebb n\u00e0y l\u00e0 m\u1ed9t <strong>thu th\u1eadp th\u00f4ng tin \u0111\u1ea7u v\u00e0o<\/strong> \u2192 n\u00f3 mu\u1ed1n m\u1ed9t <strong>NPN<\/strong> c\u1ea3m bi\u1ebfn (c\u1ea3m bi\u1ebfn l\u00e0m cho \u0111\u01b0\u1eddng d\u1eabn \u0111\u1ea1t m\u1ee9c 0 V).<\/li>\n<\/ul>\n\n<p>C\u00f3 ba n\u01a1i cho th\u1ea5y \u0111i\u1ec1u n\u00e0y m\u00e0 kh\u00f4ng c\u1ea7n ph\u1ea3i \u0111o\u00e1n m\u00f2. H\u00e3y ki\u1ec3m tra s\u01a1 \u0111\u1ed3 \u0111\u1ea5u d\u00e2y in tr\u00ean bo m\u1ea1ch, nh\u00e3n tr\u00ean d\u1ea3i \u0111\u1ea7u n\u1ed1i, ho\u1eb7c ph\u1ea7n h\u01b0\u1edbng d\u1eabn \u0111\u1ea5u d\u00e2y I\/O trong s\u00e1ch h\u01b0\u1edbng d\u1eabn s\u1eed d\u1ee5ng PLC. D\u00f2ng chung th\u01b0\u1eddng \u0111\u01b0\u1ee3c in l\u00e0 \u201cCOM\u201d k\u00e8m theo t\u00ean thanh ray m\u00e0 n\u00f3 k\u1ebft n\u1ed1i. Ch\u1ec9 c\u1ea7n m\u01b0\u1eddi gi\u00e2y \u0111\u1ec3 ki\u1ec3m tra b\u1ea5t k\u1ef3 m\u1ed9t trong ba c\u00e1ch n\u00e0y l\u00e0 \u0111\u1ee7, thay v\u00ec ph\u1ea3i ph\u1ecfng \u0111o\u00e1n t\u1eeb ph\u00eda c\u1ea3m bi\u1ebfn: c\u1ea3m bi\u1ebfn kh\u00f4ng th\u1ec3 cho b\u1ea1n bi\u1ebft bo m\u1ea1ch mong \u0111\u1ee3i \u0111i\u1ec1u g\u00ec.<\/p>\n\n<h3>Ki\u1ec3m tra \u0111\u1ed3ng h\u1ed3 \u0111o: \u0110\u1ea7u ra k\u00e9o v\u1ec1 ph\u00eda \u0111\u01b0\u1eddng ray n\u00e0o?<\/h3>\n\n<p>Kh\u00f4ng c\u00f3 nh\u00e3n, kh\u00f4ng c\u00f3 s\u01a1 \u0111\u1ed3, kh\u00f4ng c\u00f3 h\u01b0\u1edbng d\u1eabn s\u1eed d\u1ee5ng. \u0110\u01b0\u1ee3c th\u00f4i. C\u1ea5p ngu\u1ed3n cho c\u1ea3m bi\u1ebfn (d\u00e2y n\u00e2u n\u1ed1i v\u1edbi +24 V, d\u00e2y xanh n\u1ed1i v\u1edbi 0 V) v\u00e0 d\u00f9ng \u0111\u1ed3ng h\u1ed3 v\u1ea1n n\u0103ng \u1edf ch\u1ebf \u0111\u1ed9 \u0111o \u0111i\u1ec7n \u00e1p m\u1ed9t chi\u1ec1u. B\u00ed quy\u1ebft l\u00e0 <strong>\u0111i\u1ec3m tham chi\u1ebfu<\/strong>:<\/p>\n\n<div class=\"rich-card bd-reveal\">\n <p class=\"rich-card-title\"><span class=\"rich-ico\" aria-hidden=\"true\"><svg class=\"ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><circle cx=\"6\" cy=\"19\" r=\"3\"\/><path d=\"M9 19h8.5a3.5 3.5 0 0 0 0-7h-11a3.5 3.5 0 0 1 0-7H15\"\/><circle cx=\"18\" cy=\"5\" r=\"3\"\/><\/svg><\/span>X\u00e1c \u0111\u1ecbnh lo\u1ea1i t\u00edn hi\u1ec7u \u0111\u1ea7u ra c\u1ee7a c\u1ea3m bi\u1ebfn b\u1eb1ng \u0111\u1ed3ng h\u1ed3 v\u1ea1n n\u0103ng<\/p>\n <ol class=\"rich-steps\">\n <li><span class=\"chip\">1<\/span><span>C\u1ea5p ngu\u1ed3n cho c\u1ea3m bi\u1ebfn (d\u00e2y n\u00e2u +24 V, d\u00e2y xanh d\u01b0\u01a1ng 0 V).<\/span><\/li>\n <li><span class=\"chip\">2<\/span><span>\u0110\u1eb7t \u0111\u1ea7u d\u00e2y \u0111en c\u1ee7a \u0111\u1ed3ng h\u1ed3 \u0111o v\u00e0o v\u1ecb tr\u00ed 0 V, \u0111\u1ea7u d\u00e2y \u0111\u1ecf v\u00e0o d\u00e2y \u0111\u1ea7u ra m\u00e0u \u0111en, r\u1ed3i k\u00edch ho\u1ea1t c\u1ea3m bi\u1ebfn. N\u1ebfu gi\u00e1 tr\u1ecb hi\u1ec3n th\u1ecb nh\u1ea3y v\u1ecdt l\u00ean \u2248 \u0111i\u1ec7n \u00e1p ngu\u1ed3n (v\u00ed d\u1ee5: 23\u201324 V), th\u00ec \u0111\u00f3 l\u00e0 lo\u1ea1i PNP.<\/span><\/li>\n <li><span class=\"chip\">3<\/span><span>Di chuy\u1ec3n \u0111\u1ea7u d\u00f2 m\u00e0u \u0111en c\u1ee7a \u0111\u1ed3ng h\u1ed3 \u0111o \u0111\u1ebfn c\u1ef1c +24 V, gi\u1eef nguy\u00ean \u0111\u1ea7u d\u00f2 m\u00e0u \u0111\u1ecf tr\u00ean d\u00e2y \u0111\u1ea7u ra, r\u1ed3i nh\u1ea5n n\u00fat k\u00edch ho\u1ea1t m\u1ed9t l\u1ea7n n\u1eefa. N\u1ebfu gi\u00e1 tr\u1ecb hi\u1ec3n th\u1ecb l\u00fac n\u00e0y gi\u1ea3m xu\u1ed1ng g\u1ea7n 0 V (\u0111\u1ea7u ra b\u1ecb k\u00e9o v\u1ec1 ph\u00eda 0 V), th\u00ec \u0111\u00f3 l\u00e0 lo\u1ea1i NPN.<\/span><\/li>\n <li><span class=\"chip\">4<\/span><span>Ch\u1ec9 c\u1ea7n xem th\u00f4ng tin tr\u00ean m\u1ed9t trong hai \u0111\u1ea7u n\u1ed1i l\u00e0 c\u00f3 th\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c lo\u1ea1i \u0111\u1ea7u ra; n\u1ebfu th\u00f4ng tin tr\u00ean c\u1ea3 hai \u0111\u1ea7u n\u1ed1i \u0111\u1ec1u gi\u1ed1ng nhau th\u00ec th\u01b0\u1eddng l\u00e0 \u0111\u1ea7u ra ki\u1ec3u \u0111\u1ea9y-k\u00e9o ho\u1eb7c \u0111\u1ea7u ra 4 d\u00e2y. Thay v\u00e0o \u0111\u00f3, h\u00e3y ki\u1ec3m tra m\u00e0u s\u1eafc c\u1ee7a c\u00e1c d\u00e2y.<\/span><\/li>\n <\/ol>\n<\/div>\n\n<h3>T\u1ea1i sao c\u1ea3m bi\u1ebfn NPN l\u1ea1i hi\u1ec3n th\u1ecb gi\u00e1 tr\u1ecb \u201c5 V\u201d (v\u00e0 c\u00e1ch ki\u1ec3m tra m\u00e0 kh\u00f4ng c\u1ea7n \u0111\u1ed3ng h\u1ed3 \u0111o)<\/h3>\n\n<p>T\u1ea1i sao l\u1ea1i ho\u00e1n \u0111\u1ed5i tham chi\u1ebfu? B\u1edfi v\u00ec khi c\u00f4ng t\u1eafc c\u1ee7a c\u1ea3m bi\u1ebfn NPN m\u1edf ra, n\u00f3 s\u1ebd <strong>kh\u00f4ng<\/strong> \u0110i\u1ec7n \u00e1p \u0111\u1ea7u ra l\u00e0 0 V. D\u00e2y \u0111\u1ea7u ra ch\u1ec9 c\u1ea7n ng\u1eaft k\u1ebft n\u1ed1i. N\u00f3 <strong>s\u1ed1 th\u1eadp ph\u00e2n<\/strong>. V\u00e0 m\u1ed9t d\u00e2y d\u1eabn kh\u00f4ng n\u1ed1i \u0111\u1ea5t khi \u0111o s\u1ebd hi\u1ec3n th\u1ecb b\u1ea5t k\u1ef3 \u0111i\u1ec7n \u00e1p n\u00e0o r\u00f2 r\u1ec9 v\u00e0o \u0111\u00f3: 3,3 V, 5 V, ho\u1eb7c m\u1ed9t v\u00e0i volt thay \u0111\u1ed5i ch\u1eadm ch\u1ea1p. Gi\u00e1 tr\u1ecb \u0111o \u1ea3o \u0111\u00f3 kh\u00f4ng ph\u1ea3i l\u00e0 l\u1ed7i v\u00e0 c\u0169ng kh\u00f4ng ph\u1ea3i do c\u1ea3m bi\u1ebfn h\u1ecfng. \u0110\u00f3 l\u00e0 do c\u00f4ng t\u1eafc b\u1ecb h\u1edf.<\/p>\n\n<div class=\"rich-callout bd-reveal\">\n <p class=\"rich-callout-title\"><span class=\"rich-ico\" aria-hidden=\"true\"><svg class=\"ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"m21.73 18-8-14a2 2 0 0 0-3.48 0l-8 14A2 2 0 0 0 4 21h16a2 2 0 0 0 1.73-3Z\"\/><path d=\"M12 9v4\"\/><path d=\"M12 17h.01\"\/><\/svg><\/span>Vi\u1ec7c \u0111o \u0111\u01b0\u1ee3c \u0111i\u1ec7n \u00e1p 5 V so v\u1edbi \u0111\u1ea5t tr\u00ean c\u1ea3m bi\u1ebfn NPN kh\u00f4ng ph\u1ea3i l\u00e0 s\u1ef1 c\u1ed1<\/p>\n <p>\u0110\u1ea7u ra NPN s\u1ebd \u1edf tr\u1ea1ng th\u00e1i n\u1ed5i khi t\u1eaft: \u0111\u00f3 l\u00e0 m\u1ed9t c\u00f4ng t\u1eafc m\u1edf, ch\u1ee9 kh\u00f4ng ph\u1ea3i b\u1ecb h\u1ecfng. \u0110i\u1ec7n \u00e1p tham chi\u1ebfu ch\u00ednh x\u00e1c cho c\u1ea3m bi\u1ebfn NPN l\u00e0 +24 V: khi \u0111\u01b0\u1ee3c k\u00edch ho\u1ea1t, \u0111i\u1ec7n \u00e1p tr\u00ean d\u00e2y s\u1ebd g\u1ea7n b\u1eb1ng 0 V so v\u1edbi \u0111\u01b0\u1eddng \u0111i\u1ec7n \u00e1p \u0111\u00f3. N\u1ebfu \u0111o so v\u1edbi \u0111\u01b0\u1eddng \u0111i\u1ec7n \u00e1p sai, b\u1ea1n s\u1ebd ph\u1ea3i m\u1ea5t c\u1ea3 bu\u1ed5i chi\u1ec1u \u0111\u1ec3 t\u00ecm ki\u1ebfm m\u1ed9t \u0111i\u1ec7n \u00e1p \u1ea3o.<\/p>\n<\/div>\n\n<p>Do \u0111\u00f3, c\u00e1c c\u1ea3m bi\u1ebfn NPN \u0111\u01b0\u1ee3c \u0111o <em>so v\u1edbi +24 V<\/em>: Khi \u0111\u01b0\u1ee3c k\u00edch ho\u1ea1t, \u0111i\u1ec7n \u00e1p tr\u00ean d\u00e2y g\u1ea7n b\u1eb1ng 0 V so v\u1edbi \u0111\u01b0\u1eddng \u0111i\u1ec7n \u0111\u00f3; khi \u0111\u01b0\u1ee3c th\u1ea3 ra, \u0111i\u1ec7n \u00e1p tr\u00ean d\u00e2y b\u1eb1ng to\u00e0n b\u1ed9 \u0111i\u1ec7n \u00e1p \u0111\u01b0\u1eddng \u0111i\u1ec7n. C\u00e1c c\u1ea3m bi\u1ebfn PNP \u0111\u01b0\u1ee3c \u0111o so v\u1edbi 0 V, trong \u0111\u00f3 \u0111\u1ea7u ra m\u1edf ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng s\u1ebd kh\u00f4ng hi\u1ec3n th\u1ecb gi\u00e1 tr\u1ecb n\u00e0o c\u1ea3.<\/p>\n\n<p>Kh\u00f4ng c\u00f3 \u0111\u1ed3ng h\u1ed3 v\u1ea1n n\u0103ng s\u1eb5n? M\u1ed9t b\u00f3ng \u0111\u00e8n th\u1eed ho\u1eb7c cu\u1ed9n d\u00e2y r\u01a1le DC nh\u1ecf c\u0169ng c\u00f3 t\u00e1c d\u1ee5ng t\u01b0\u01a1ng t\u1ef1. K\u1ebft n\u1ed1i n\u00f3 gi\u1eefa d\u00e2y \u0111\u1ea7u ra v\u00e0 \u0111\u01b0\u1eddng \u0111i\u1ec7n m\u00e0 b\u1ea1n nghi ng\u1edd, sau \u0111\u00f3 k\u00edch ho\u1ea1t c\u1ea3m bi\u1ebfn. Linh ki\u1ec7n n\u00e0o \u0111\u01b0\u1ee3c c\u1ea5p \u0111i\u1ec7n s\u1ebd cho b\u1ea1n bi\u1ebft \u0111\u01b0\u1eddng \u0111i\u1ec7n n\u00e0o \u0111\u01b0\u1ee3c c\u00f4ng t\u1eafc n\u1ed1i. V\u00e0 m\u1ed9t l\u01b0u \u00fd tr\u01b0\u1edbc khi tin t\u01b0\u1edfng v\u00e0o b\u1ea5t k\u1ef3 k\u1ebft qu\u1ea3 \u0111o n\u00e0o: m\u1ed9t c\u1ea3m bi\u1ebfn c\u00f3 b\u00f3ng b\u00e1n d\u1eabn \u0111\u1ea7u ra b\u1ecb ch\u00e1y c\u00f3 th\u1ec3 hi\u1ec3n th\u1ecb \u201clu\u00f4n b\u1eadt\u201d tr\u00ean c\u1ea3 hai \u0111\u01b0\u1eddng \u0111i\u1ec7n tham chi\u1ebfu. N\u1ebfu m\u1ed9t c\u1ea3m bi\u1ebfn ho\u00e0n to\u00e0n m\u1edbi l\u1ea1i ho\u1ea1t \u0111\u1ed9ng b\u1ea5t th\u01b0\u1eddng nh\u01b0 v\u1eady, h\u00e3y nghi ng\u1edd ch\u00ednh c\u1ea3m bi\u1ebfn \u0111\u00f3 tr\u01b0\u1edbc khi nghi ng\u1edd ph\u01b0\u01a1ng ph\u00e1p c\u1ee7a b\u1ea1n.<\/p>\n\n<h2>NPN v\u00e0 PNP: Lo\u1ea1i n\u00e0o m\u1edbi th\u1ef1c s\u1ef1 ph\u00f9 h\u1ee3p v\u1edbi b\u1ea1n?<\/h2>\n\n<p>B\u00e2y gi\u1edd b\u1ea1n \u0111\u00e3 bi\u1ebft m\u00ecnh c\u00f3 nh\u1eefng g\u00ec. C\u00e2u h\u1ecfi ti\u1ebfp theo l\u00e0 c\u00e1i n\u00e0o trong s\u1ed1 \u0111\u00f3 l\u00e0 c\u1ee7a b\u1ea1n <em>\u0111\u01a1n \u0111\u0103ng k\u00fd<\/em> nhu c\u1ea7u, v\u00e0 c\u00e2u tr\u1ea3 l\u1eddi ch\u00e2n th\u00e0nh l\u00e0 \u201cc\u00e1i n\u00e0o t\u1ed1t h\u01a1n\u201d kh\u00f4ng ph\u1ea3i l\u00e0 c\u00e2u h\u1ecfi \u0111\u00fang. T\u00ednh t\u01b0\u01a1ng th\u00edch m\u1edbi l\u00e0 y\u1ebfu t\u1ed1 quy\u1ebft \u0111\u1ecbnh, v\u00e0 t\u00ednh t\u01b0\u01a1ng th\u00edch c\u00f3 hai d\u1ea1ng kh\u00e1c nhau t\u00f9y thu\u1ed9c v\u00e0o vi\u1ec7c b\u1ea1n \u0111ang l\u1eafp r\u00e1p hay s\u1eeda ch\u1eefa.<\/p>\n\n<p><strong>N\u1ebfu b\u1ea1n \u0111ang k\u1ebft n\u1ed1i m\u1ed9t thi\u1ebft b\u1ecb m\u1edbi: th\u1ebb \u0111\u1ea7u v\u00e0o s\u1ebd quy\u1ebft \u0111\u1ecbnh.<\/strong> B\u1ea3ng \u0111i\u1ec1u khi\u1ec3n m\u1edbi, m\u00e1y m\u1edbi, d\u00e2y chuy\u1ec1n m\u1edbi: h\u00e3y \u0111\u1ecdc th\u00f4ng tin tr\u00ean th\u1ebb. Th\u1ebb \u0111\u1ea7u v\u00e0o ch\u00ecm (\u0111i\u1ec7n \u00e1p chung l\u00e0 0 V) s\u1eed d\u1ee5ng c\u1ea3m bi\u1ebfn PNP; th\u1ebb \u0111\u1ea7u v\u00e0o ngu\u1ed3n (\u0111i\u1ec7n \u00e1p chung l\u00e0 +24 V) s\u1eed d\u1ee5ng c\u1ea3m bi\u1ebfn NPN. <a href=\"https:\/\/www.se.com\/us\/en\/faqs\/FA142566\/\">Ph\u1ea7n C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p (FAQ) v\u1ec1 k\u1ef9 thu\u1eadt c\u1ee7a Schneider Electric \u0111\u00e3 n\u00eau r\u00f5 m\u1ed1i quan h\u1ec7 n\u00e0y: c\u00e1c \u0111\u1ea7u v\u00e0o ki\u1ec3u \u201csinking\u201d s\u1eed d\u1ee5ng c\u1ea3m bi\u1ebfn PNP, c\u00f2n c\u00e1c \u0111\u1ea7u v\u00e0o ki\u1ec3u \u201csourcing\u201d s\u1eed d\u1ee5ng c\u1ea3m bi\u1ebfn NPN. T\u00e0i li\u1ec7u n\u00e0y nh\u1ea5n m\u1ea1nh r\u1eb1ng vi\u1ec7c l\u1ef1a ch\u1ecdn c\u1ea3m bi\u1ebfn ph\u00f9 h\u1ee3p v\u1edbi lo\u1ea1i bo m\u1ea1ch \u0111\u1ea7u v\u00e0o l\u00e0 v\u00f4 c\u00f9ng quan tr\u1ecdng<\/a>.<\/p>\n\n<p>Trong khu\u00f4n kh\u1ed5 quy t\u1eafc \u0111\u00f3, th\u1ef1c ti\u1ec5n c\u00f4ng nghi\u1ec7p hi\u1ec7n \u0111\u1ea1i \u1edf B\u1eafc M\u1ef9 v\u00e0 ch\u00e2u \u00c2u \u0111\u00e3 th\u1ed1ng nh\u1ea5t \u00e1p d\u1ee5ng <strong>M\u1ea1ch PNP c\u00f3 \u0111\u1ea7u v\u00e0o ch\u00ecm<\/strong> l\u00e0m m\u1eb7c \u0111\u1ecbnh cho c\u00e1c thi\u1ebft k\u1ebf m\u1edbi. L\u00fd do l\u00e0 th\u1ef1c ti\u1ec5n, ch\u1ee9 kh\u00f4ng ph\u1ea3i mang t\u00ednh huy\u1ec1n b\u00ed. Logic d\u01b0\u01a1ng d\u1ec5 suy lu\u1eadn h\u01a1n (\u201cc\u00f3 \u0111i\u1ec7n \u00e1p 24 V = \u0111\u1ea7u v\u00e0o b\u1eadt\u201d), v\u00e0 vi\u1ec7c kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 so v\u1edbi m\u1ee9c 0 V n\u1ed1i \u0111\u1ea5t s\u1ebd nhanh h\u01a1n. B\u1ea1n c\u00f3 th\u1ec3 d\u00f9ng \u0111\u1ea7u d\u00f2 ki\u1ec3m tra b\u1ea5t k\u1ef3 h\u1ed9p n\u1ed1i n\u00e0o d\u1ecdc theo \u0111\u01b0\u1eddng d\u00e2y v\u00e0 \u0111o so v\u1edbi \u0111i\u1ec3m n\u1ed1i \u0111\u1ea5t g\u1ea7n nh\u1ea5t. H\u1ea7u h\u1ebft c\u00e1c th\u1ebb \u0111\u1ea7u v\u00e0o PLC hi\u1ec7n nay \u0111\u1ec1u c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh cho ch\u1ebf \u0111\u1ed9 h\u00fat d\u00f2ng (sinking) ho\u1eb7c cung c\u1ea5p d\u00f2ng (sourcing), do \u0111\u00f3 quy \u01b0\u1edbc n\u00e0y l\u00e0 m\u1ed9t s\u1ef1 l\u1ef1a ch\u1ecdn, ch\u1ee9 kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t r\u00e0ng bu\u1ed9c.<\/p>\n\n\n<div class=\"bp-cta-mid bd-reveal\">\n <p class=\"bp-cta-mid-ttl\"><span class=\"rich-ico\" aria-hidden=\"true\"><svg class=\"ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><rect width=\"16\" height=\"16\" x=\"4\" y=\"4\" rx=\"2\"\/><rect width=\"6\" height=\"6\" x=\"9\" y=\"9\" rx=\"1\"\/><path d=\"M15 2v2\"\/><path d=\"M15 20v2\"\/><path d=\"M2 15h2\"\/><path d=\"M2 9h2\"\/><path d=\"M20 15h2\"\/><path d=\"M20 9h2\"\/><path d=\"M9 2v2\"\/><path d=\"M9 20v2\"\/><\/svg><\/span>\u0110ang l\u1eafp \u0111\u1eb7t h\u1ec7 th\u1ed1ng d\u00e2y \u0111i\u1ec7n m\u1edbi hay thay th\u1ebf c\u1ea3m bi\u1ebfn?<\/p>\n <p class=\"bp-cta-mid-copy\">H\u00e3y cho ch\u00fang t\u00f4i bi\u1ebft b\u1ea1n \u0111ang s\u1eed d\u1ee5ng lo\u1ea1i th\u1ebb \u0111\u1ea7u v\u00e0o n\u00e0o, v\u00e0 ch\u00fang t\u00f4i s\u1ebd x\u00e1c nh\u1eadn lo\u1ea1i \u0111\u1ea7u ra ph\u00f9 h\u1ee3p v\u1edbi nhu c\u1ea7u c\u1ee7a b\u1ea1n tr\u01b0\u1edbc khi b\u1ea1n \u0111\u1eb7t h\u00e0ng.<\/p>\n <a class=\"bp-cta-mid-btn\" href=\"https:\/\/www.omch.com\/vi\/contact\/\" target=\"_self\">X\u00e1c nh\u1eadn lo\u1ea1i \u0111\u1ea7u ra c\u1ee7a t\u00f4i<\/a>\n<\/div>\n\n<p><strong>N\u1ebfu b\u1ea1n \u0111ang thay th\u1ebf m\u1ed9t c\u1ea3m bi\u1ebfn: m\u00e1y s\u1ebd t\u1ef1 \u0111\u1ed9ng quy\u1ebft \u0111\u1ecbnh.<\/strong><\/p>\n\n<p>C\u00f4ng t\u00e1c s\u1eeda ch\u1eefa v\u00e0 n\u00e2ng c\u1ea5p tu\u00e2n theo m\u1ed9t quy t\u1eafc ho\u00e0n to\u00e0n kh\u00e1c: <strong>H\u1ec7 th\u1ed1ng logic hi\u1ec7n c\u00f3 c\u1ee7a m\u00e1y s\u1ebd chi\u1ebfm \u01b0u th\u1ebf, b\u1ea5t k\u1ec3 \u0111\u1ea1i h\u1ed9i khu v\u1ef1c quy\u1ebft \u0111\u1ecbnh th\u1ebf n\u00e0o.<\/strong> Nhi\u1ec1u thi\u1ebft b\u1ecb s\u1ea3n xu\u1ea5t t\u1ea1i Nh\u1eadt B\u1ea3n v\u00e0 c\u00e1c n\u01b0\u1edbc ch\u00e2u \u00c1 \u0111\u00e3 s\u1eed d\u1ee5ng giao di\u1ec7n I\/O NPN trong nhi\u1ec1u th\u1eadp k\u1ef7 qua. C\u00e1c b\u1ed9 \u0111i\u1ec1u khi\u1ec3n logic kh\u1ea3 tr\u00ecnh (PLC) c\u1ee7a c\u00e1c th\u01b0\u01a1ng hi\u1ec7u l\u1edbn c\u1ee7a Nh\u1eadt B\u1ea3n t\u1eeb tr\u01b0\u1edbc \u0111\u1ebfn nay \u0111\u1ec1u \u0111\u01b0\u1ee3c trang b\u1ecb \u0111\u1ea7u ra NPN, trong khi nhi\u1ec1u PLC ch\u00e2u \u00c2u th\u1eadm ch\u00ed ch\u01b0a bao gi\u1edd cung c\u1ea5p lo\u1ea1i \u0111\u1ea7u ra n\u00e0y. K\u1ebft qu\u1ea3 l\u00e0 tr\u00ean th\u1ecb tr\u01b0\u1eddng b\u1ea3o tr\u00ec to\u00e0n c\u1ea7u hi\u1ec7n c\u00f3 m\u1ed9t l\u01b0\u1ee3ng l\u1edbn m\u00e1y m\u00f3c s\u1eed d\u1ee5ng giao di\u1ec7n NPN, \u0111\u01b0\u1ee3c \u0111\u1eb7t ngay c\u1ea1nh c\u00e1c h\u1ec7 th\u1ed1ng PNP m\u1edbi trong c\u00f9ng m\u1ed9t x\u01b0\u1edfng s\u1ea3n xu\u1ea5t.<\/p>\n\n<div class=\"rich-callout bd-reveal\">\n <p class=\"rich-callout-title\"><span class=\"rich-ico\" aria-hidden=\"true\"><svg class=\"ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"m21.73 18-8-14a2 2 0 0 0-3.48 0l-8 14A2 2 0 0 0 4 21h16a2 2 0 0 0 1.73-3Z\"\/><path d=\"M12 9v4\"\/><path d=\"M12 17h.01\"\/><\/svg><\/span>\u201cAi c\u0169ng d\u00f9ng PNP\u201d kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t quy t\u1eafc<\/p>\n <p>H\u1ed9i ngh\u1ecb khu v\u1ef1c ch\u1ec9 \u0111\u1ec1 c\u1eadp \u0111\u1ebfn c\u00e1c thi\u1ebft b\u1ecb m\u1edbi \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t. N\u00f3 kh\u00f4ng \u0111\u1ec1 c\u1eadp g\u00ec \u0111\u1ebfn m\u00e1y m\u00f3c t\u1ea1i x\u01b0\u1edfng c\u1ee7a b\u1ea1n. M\u1ed9t m\u00e1y \u00e9p s\u1ea3n xu\u1ea5t t\u1ea1i ch\u00e2u \u00c1, m\u1ed9t d\u00e2y chuy\u1ec1n \u0111\u00f3ng g\u00f3i nh\u1eadp kh\u1ea9u, hay m\u1ed9t b\u1ed9 \u0111i\u1ec1u khi\u1ec3n c\u00f3 c\u1ef1c chung +24 V \u0111\u1ec1u s\u1ebd \u201cng\u1ea7m\u201d y\u00eau c\u1ea7u lo\u1ea1i NPN. C\u00e2u tr\u1ea3 l\u1eddi \u201cti\u00eau chu\u1ea9n\u201d s\u1ebd khi\u1ebfn b\u1ea1n ph\u1ea3i ch\u1ecbu chi ph\u00ed g\u1eedi tr\u1ea3 h\u00e0ng. Khi c\u00f2n nghi ng\u1edd, h\u00e3y h\u1ecfi ch\u00ednh m\u00e1y m\u00f3c, ch\u1ee9 \u0111\u1eebng h\u1ecfi th\u1ecb tr\u01b0\u1eddng.<\/p>\n<\/div>\n\n<p>V\u1eady th\u00ec c\u00e1i n\u00e0o s\u1ebd \u201cth\u1eafng\u201d? C\u1ea3 hai \u0111\u1ec1u kh\u00f4ng. \u0110\u00f3 ch\u00ednh l\u00e0 nh\u1eadn \u0111\u1ecbnh \u0111\u00e1ng l\u01b0u \u00fd khi th\u1ef1c hi\u1ec7n c\u00f4ng t\u00e1c mua s\u1eafm. PNP ti\u1ebfp t\u1ee5c gi\u00e0nh \u0111\u01b0\u1ee3c c\u00e1c thi\u1ebft k\u1ebf b\u1ea3ng m\u1ea1ch m\u1edbi t\u1ea1i ch\u00e2u \u00c2u v\u00e0 M\u1ef9, trong khi NPN v\u1eabn gi\u1eef v\u1eefng v\u1ecb th\u1ebf c\u1ee7a m\u00ecnh \u1edf b\u1ea5t c\u1ee9 n\u01a1i n\u00e0o c\u00f3 s\u1eeda ch\u1eefa c\u00e1c m\u00e1y m\u00f3c s\u1ea3n xu\u1ea5t t\u1ea1i ch\u00e2u \u00c1 ho\u1eb7c c\u00e1c d\u00f2ng m\u00e1y c\u0169. Hai c\u1ea5u tr\u00fac n\u00e0y ph\u1ee5c v\u1ee5 hai l\u0129nh v\u1ef1c kinh t\u1ebf kh\u00e1c nhau: s\u1ea3n xu\u1ea5t m\u1edbi v\u00e0 b\u1ea3o tr\u00ec. N\u1ebfu doanh nghi\u1ec7p c\u1ee7a b\u1ea1n ho\u1ea1t \u0111\u1ed9ng trong c\u1ea3 hai l\u0129nh v\u1ef1c n\u00e0y (v\u00e0 h\u1ea7u h\u1ebft ng\u01b0\u1eddi mua c\u1ea3m bi\u1ebfn \u0111\u1ec1u nh\u01b0 v\u1eady), th\u00ec \u201cNPN so v\u1edbi PNP\u201d kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t l\u1ef1a ch\u1ecdn m\u00e0 b\u1ea1n ch\u1ec9 c\u1ea7n \u0111\u01b0a ra m\u1ed9t l\u1ea7n. \u0110\u00f3 l\u00e0 c\u00e2u h\u1ecfi b\u1ea1n c\u1ea7n tr\u1ea3 l\u1eddi cho t\u1eebng m\u00e1y, t\u1eebng \u0111\u01a1n h\u00e0ng, trong su\u1ed1t v\u00f2ng \u0111\u1eddi c\u1ee7a thi\u1ebft b\u1ecb.<\/p>\n\n<h2>Mua c\u1ea3m bi\u1ebfn: Nh\u1eefng y\u00eau c\u1ea7u c\u1ea7n n\u00eau r\u00f5 v\u1edbi nh\u00e0 cung c\u1ea5p<\/h2>\n\n<p>\u0110\u00e2y ch\u00ednh l\u00e0 l\u00fac lo\u1ea1i s\u1ea3n ph\u1ea9m kh\u00f4ng c\u00f2n ch\u1ec9 l\u00e0 m\u1ed9t kh\u00e1i ni\u1ec7m m\u00e0 tr\u1edf th\u00e0nh m\u1ed9t d\u00f2ng trong \u0111\u01a1n \u0111\u1eb7t h\u00e0ng. Trong danh m\u1ee5c s\u1ea3n ph\u1ea9m c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t, NPN v\u00e0 PNP kh\u00f4ng ph\u1ea3i l\u00e0 ph\u1ee5 ki\u1ec7n. Ch\u00fang l\u00e0 <strong>c\u00e1c m\u00e3 s\u1ea3n ph\u1ea9m kh\u00e1c nhau<\/strong>. C\u00f9ng m\u1ed9t v\u1ecf b\u1ecdc, c\u00f9ng m\u1ed9t kho\u1ea3ng c\u00e1ch ph\u00e1t hi\u1ec7n, c\u00f9ng m\u1ed9t m\u00e3 m\u00e0u d\u00e2y d\u1eabn, v\u00e0 m\u1ed7i lo\u1ea1i b\u00f3ng b\u00e1n d\u1eabn \u0111\u1ea7u ra l\u1ea1i c\u00f3 m\u1ed9t h\u1eadu t\u1ed1 ho\u1eb7c m\u00e3 model kh\u00e1c nhau. Nhi\u1ec1u nh\u00e0 cung c\u1ea5p m\u00e3 h\u00f3a c\u1ea5u tr\u00fac m\u1ea1ch tr\u1ef1c ti\u1ebfp v\u00e0o m\u00e3 model (vi\u1ec7c s\u1eed d\u1ee5ng h\u1eadu t\u1ed1 \u201c-N\u201d thay v\u00ec \u201c-P\u201d cho c\u00f9ng m\u1ed9t d\u00f2ng s\u1ea3n ph\u1ea9m nh\u01b0ng c\u00f3 c\u1ea5u tr\u00fac kh\u00e1c nhau l\u00e0 m\u1ed9t m\u1eabu ph\u1ed5 bi\u1ebfn). N\u1ebfu \u0111\u1eb7t h\u00e0ng \u201cc\u1ea3m bi\u1ebfn gi\u1ed1ng nh\u01b0 l\u1ea7n tr\u01b0\u1edbc\u201d, s\u1ea3n ph\u1ea9m s\u1ebd kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng n\u1ebfu \u0111\u01a1n h\u00e0ng tr\u01b0\u1edbc \u0111\u00f3 l\u00e0 d\u00e0nh cho m\u1ed9t m\u00e1y kh\u00e1c.<\/p>\n\n<div class=\"rich-card bd-reveal\">\n <p class=\"rich-card-title\"><span class=\"rich-ico\" aria-hidden=\"true\"><svg class=\"ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"m3 17 2 2 4-4\"\/><path d=\"m3 7 2 2 4-4\"\/><path d=\"M13 6h8\"\/><path d=\"M13 12h8\"\/><path d=\"M13 18h8\"\/><\/svg><\/span>B\u1ed1n b\u01b0\u1edbc ki\u1ec3m tra c\u1ea7n th\u1ef1c hi\u1ec7n tr\u01b0\u1edbc khi x\u00e1c nh\u1eadn b\u1ea5t k\u1ef3 \u0111\u01a1n \u0111\u1eb7t h\u00e0ng c\u1ea3m bi\u1ebfn n\u00e0o<\/p>\n <ul class=\"rich-list\">\n <li><span class=\"rich-ico\" aria-hidden=\"true\"><svg class=\"ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M22 11.08V12a10 10 0 1 1-5.93-9.14\"\/><path d=\"m9 11 3 3L22 4\"\/><\/svg><\/span><span>C\u1ea5u tr\u00fac \u0111\u1ea7u ra ph\u1ea3i \u0111\u01b0\u1ee3c ghi r\u00f5 trong \u0111\u01a1n \u0111\u1eb7t h\u00e0ng (NPN ho\u1eb7c PNP). Kh\u00f4ng bao gi\u1edd \u0111\u01b0\u1ee3c cho r\u1eb1ng \u0111i\u1ec1u n\u00e0y \u0111\u00e3 \u0111\u01b0\u1ee3c ng\u1ea7m hi\u1ec3u.<\/span><\/li>\n <li><span class=\"rich-ico\" aria-hidden=\"true\"><svg class=\"ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M22 11.08V12a10 10 0 1 1-5.93-9.14\"\/><path d=\"m9 11 3 3L22 4\"\/><\/svg><\/span><span>NO\/NC \u0111\u01b0\u1ee3c n\u00eau ri\u00eang bi\u1ec7t v\u1edbi c\u1ea5u tr\u00fac li\u00ean k\u1ebft (xem ph\u1ea7n v\u1ec1 s\u1ef1 c\u1ed1 b\u00ean d\u01b0\u1edbi: \u0111\u00e2y l\u00e0 hai y\u1ebfu t\u1ed1 \u0111\u1ed9c l\u1eadp v\u1edbi nhau).<\/span><\/li>\n <li><span class=\"rich-ico\" aria-hidden=\"true\"><svg class=\"ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M22 11.08V12a10 10 0 1 1-5.93-9.14\"\/><path d=\"m9 11 3 3L22 4\"\/><\/svg><\/span><span>M\u00e3 s\u1ea3n ph\u1ea9m tr\u00ean trang danh m\u1ee5c ph\u00f9 h\u1ee3p v\u1edbi lo\u1ea1i \u0111\u1ea7u ra m\u00e0 b\u1ea1n c\u1ea7n; n\u1ebfu trang \u0111\u00f3 li\u1ec7t k\u00ea c\u1ea3 hai bi\u1ebfn th\u1ec3, th\u00ec b\u1ea1n \u0111ang \u0111\u1eb7t h\u00e0ng m\u1ed9t m\u00e3 c\u1ee5 th\u1ec3.<\/span><\/li>\n <li><span class=\"rich-ico\" aria-hidden=\"true\"><svg class=\"ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M22 11.08V12a10 10 0 1 1-5.93-9.14\"\/><path d=\"m9 11 3 3L22 4\"\/><\/svg><\/span><span>N\u1ebfu \u0111\u00e2y l\u00e0 tr\u01b0\u1eddng h\u1ee3p thay th\u1ebf, b\u1ea1n n\u00ean ki\u1ec3m tra \u0111\u1ea7u n\u1ed1i chung c\u1ee7a bo m\u1ea1ch \u0111\u1ea7u v\u00e0o ho\u1eb7c ki\u1ec3m tra c\u1ea3m bi\u1ebfn c\u0169, thay v\u00ec ch\u1ec9 \u0111\u1ecdc nh\u00e3n tr\u00ean c\u1ea3m bi\u1ebfn \u0111\u00e3 h\u1ecfng.<\/span><\/li>\n <\/ul>\n<\/div>\n\n<p>Vi\u1ec7c ki\u1ec3m tra cu\u1ed1i c\u00f9ng n\u00e0y quan tr\u1ecdng h\u01a1n nhi\u1ec1u so v\u1edbi v\u1ebb b\u1ec1 ngo\u00e0i. Nh\u00e3n tr\u00ean c\u1ea3m bi\u1ebfn h\u1ecfng ch\u1ec9 l\u00e0 g\u1ee3i \u00fd, kh\u00f4ng ph\u1ea3i s\u1ef1 th\u1eadt: c\u00e1c c\u1ea3m bi\u1ebfn c\u00f3 th\u1ec3 \u0111\u00e3 b\u1ecb \u0111\u1ed9i s\u1eeda ch\u1eefa tr\u01b0\u1edbc \u0111\u00f3 thay th\u1ebf, v\u00e0 nh\u00e3n ch\u1ec9 m\u00f4 t\u1ea3 nh\u1eefng g\u00ec \u0111\u00e3 \u0111\u01b0\u1ee3c giao, ch\u1ee9 kh\u00f4ng ph\u1ea3i nh\u1eefng g\u00ec m\u00e1y m\u00f3c th\u1ef1c s\u1ef1 c\u1ea7n. Vi\u1ec7c l\u1eafp nh\u1ea7m bo m\u1ea1ch c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn th\u1eddi gian ch\u1edd l\u00ean \u0111\u1ebfn 6 tu\u1ea7n \u2013 m\u1ed9t chi ph\u00ed th\u1ef1c t\u1ebf \u0111\u00e3 \u0111\u01b0\u1ee3c c\u00e1c k\u1ef9 s\u01b0 t\u1eebng tr\u1ea3i qua m\u00f4 t\u1ea3. Vi\u1ec7c ki\u1ec3m tra c\u00e1c \u0111i\u1ec3m n\u1ed1i chung trong 10 gi\u00e2y ch\u00ednh l\u00e0 bi\u1ec7n ph\u00e1p ph\u00f2ng ng\u1eeba r\u1ebb nh\u1ea5t tr\u00ean b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n.<\/p>\n\n<p>M\u1ed9t l\u01b0u \u00fd n\u1eefa khi b\u1ea1n \u0111ang \u1edf m\u00e0n h\u00ecnh \u0111\u1eb7t h\u00e0ng: c\u00e1c thi\u1ebft b\u1ecb \u0111\u1ea7u ra ti\u1ebfp \u0111i\u1ec3m kh\u00f4ng thu\u1ed9c ph\u1ea1m vi th\u1ea3o lu\u1eadn n\u00e0y. N\u1ebfu b\u1ea1n \u0111ang mua c\u00f4ng t\u1eafc gi\u1edbi h\u1ea1n ho\u1eb7c c\u00f4ng t\u1eafc vi m\u00f4, s\u1ebd kh\u00f4ng c\u00f3 th\u00f4ng s\u1ed1 NPN\/PNP n\u00e0o c\u1ea7n ch\u1ec9 \u0111\u1ecbnh. Ti\u1ebfp \u0111i\u1ec3m c\u01a1 h\u1ecdc kh\u00f4ng ph\u00e2n bi\u1ec7t \u0111\u01b0\u1eddng ray n\u00e0o \u0111\u01b0\u1ee3c k\u00edch ho\u1ea1t. Ch\u1ec9 c\u1ea7n h\u1ecfi v\u1ec1 c\u1ea5u tr\u00fac \u0111\u1ea7u ra khi c\u00f3 \u0111\u1ea7u ra DC b\u00e1n d\u1eabn, v\u00e0 b\u1ea1n s\u1ebd kh\u00f4ng bao gi\u1edd ph\u1ea3i y\u00eau c\u1ea7u m\u1ed9t linh ki\u1ec7n kh\u00f4ng t\u1ed3n t\u1ea1i.<\/p>\n\n\n<div class=\"bp-3-pn bd-reveal\">\n <p class=\"bp-3-title\"><span class=\"rich-ico\" aria-hidden=\"true\"><svg class=\"ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M12.586 2.586A2 2 0 0 0 11.172 2H4a2 2 0 0 0-2 2v7.172a2 2 0 0 0 .586 1.414l8.704 8.704a2.426 2.426 0 0 0 3.42 0l6.58-6.58a2.426 2.426 0 0 0 0-3.42z\"\/><circle cx=\"7.5\" cy=\"7.5\" r=\".5\" fill=\"currentColor\"\/><\/svg><\/span>Lo\u1ea1i \u0111\u1ea7u ra \u0111\u01b0\u1ee3c ghi trong m\u00e3 s\u1ea3n ph\u1ea9m<\/p>\n <div class=\"bp-3-grid\">\n <div class=\"bp-3-cell\">\n <span class=\"bp-3-chip\">-N<\/span>\n <span class=\"bp-3-cellcopy\"><span class=\"bp-3-celllabel\">\u0110\u1ea7u ra NPN<\/span><span class=\"bp-3-cellsub\">\u0110\u01b0a m\u1ee9c \u0111i\u1ec7n \u00e1p \u0111\u1ea7u ra v\u1ec1 0 V<\/span><\/span>\n <\/div>\n <div class=\"bp-3-cell\">\n <span class=\"bp-3-chip\">-P<\/span>\n <span class=\"bp-3-cellcopy\"><span class=\"bp-3-celllabel\">\u0110\u1ea7u ra PNP<\/span><span class=\"bp-3-cellsub\">Cung c\u1ea5p ngu\u1ed3n +24 V cho t\u1ea3i<\/span><\/span>\n <\/div>\n <\/div>\n <p class=\"bp-3-foot\">S\u1eafp x\u1ebfp theo m\u00e3 s\u1ea3n ph\u1ea9m, kh\u00f4ng ph\u1ea3i theo dung l\u01b0\u1ee3ng b\u1ed9 nh\u1edb.<\/p>\n<\/div>\n\n<h2>C\u00e1c ch\u1ebf \u0111\u1ed9 h\u1ecfng h\u00f3c, NO\/NC v\u00e0 chuy\u1ec3n \u0111\u1ed5i NPN\u2194PNP<\/h2>\n\n<p>C\u1ea3m bi\u1ebfn c\u00f3 th\u1ec3 b\u1ecb h\u1ecfng, v\u00e0 nh\u1eefng c\u1ea3m bi\u1ebfn b\u1ecb \u0111\u1ea5u d\u00e2y sai l\u1ea1i cho th\u1ea5y nh\u1eefng d\u1ea5u hi\u1ec7u h\u1ecfng h\u00f3c r\u1ea5t d\u1ec5 nh\u1eadn bi\u1ebft. C\u00f3 hai h\u01b0\u1edbng h\u1ecfng h\u00f3c m\u00e0 b\u1ea1n c\u1ea7n l\u01b0u \u00fd tr\u01b0\u1edbc khi ch\u00fang khi\u1ebfn b\u1ea1n ph\u1ea3i b\u1ecf l\u1ee1 ca l\u00e0m vi\u1ec7c, v\u00e0 m\u1ed9t trong s\u1ed1 \u0111\u00f3 th\u1ef1c s\u1ef1 \u0111i ng\u01b0\u1ee3c l\u1ea1i v\u1edbi tr\u1ef1c gi\u00e1c.<\/p>\n\n<h3>Ch\u1ee9c n\u0103ng th\u1ef1c s\u1ef1 c\u1ee7a hi\u1ec7n t\u01b0\u1ee3ng ch\u1ea1m \u0111\u1ea5t ng\u1eafn m\u1ea1ch: T\u1ea1i sao c\u00e2u n\u00f3i \u201cPNP an to\u00e0n h\u01a1n\u201d ch\u1ec9 l\u00e0 m\u1ed9t n\u1eeda s\u1ef1 th\u1eadt<\/h3>\n\n<p>L\u1ea5y m\u1ed9t c\u1ea3m bi\u1ebfn PNP v\u00e0 n\u1ed1i ng\u1eafn d\u00e2y \u0111\u1ea7u ra c\u1ee7a n\u00f3 v\u1edbi \u0111\u1ea5t: m\u1ed9t s\u1ee3i c\u00e1p b\u1ecb m\u00f2n, m\u1ed9t \u1ed1ng d\u1eabn b\u1ecb d\u1eadp n\u00e1t, m\u1ed9t s\u1ee3i d\u00e2y l\u1ecfng l\u1ebbo ch\u1ea1m v\u00e0o khung. L\u00fac n\u00e0y, c\u00f4ng t\u1eafc ph\u00eda d\u01b0\u01a1ng s\u1ebd n\u1ed1i tr\u1ef1c ti\u1ebfp +24 V v\u1edbi \u0111\u1ea5t qua \u0111i\u1ec3m l\u1ed7i. M\u1ed9t c\u01a1 ch\u1ebf b\u1ea3o v\u1ec7 n\u00e0o \u0111\u00f3 s\u1ebd ho\u1ea1t \u0111\u1ed9ng: c\u1ea7u ch\u00ec b\u1ecb \u0111\u1ee9t, c\u00f4ng t\u1eafc ng\u1eaft m\u1ea1ch nh\u1ea3y, b\u1ed9 ngu\u1ed3n ng\u1eaft ngu\u1ed3n, ho\u1eb7c c\u01a1 ch\u1ebf b\u1ea3o v\u1ec7 ng\u1eafn m\u1ea1ch c\u1ee7a ch\u00ednh c\u1ea3m bi\u1ebfn s\u1ebd k\u00edch ho\u1ea1t. L\u1ed7i l\u00e0 <strong>c\u00f3 th\u1ec3 nh\u00ecn th\u1ea5y<\/strong>: d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua, c\u00f3 th\u1ee9 g\u00ec \u0111\u00f3 ph\u1ea3n \u1ee9ng l\u1ea1i, v\u00e0 m\u00e1y d\u1eebng l\u1ea1i \u1edf tr\u1ea1ng th\u00e1i m\u00e0 ai \u0111\u00f3 c\u00f3 th\u1ec3 ph\u00e1t hi\u1ec7n ra.<\/p>\n\n<p>B\u00e2y gi\u1edd h\u00e3y l\u00e0m t\u01b0\u01a1ng t\u1ef1 v\u1edbi m\u1ed9t c\u1ea3m bi\u1ebfn NPN. C\u00f4ng t\u1eafc c\u1ee7a n\u00f3 n\u1eb1m \u1edf ph\u00eda \u0111i\u1ec7n \u00e1p th\u1ea5p; vi\u1ec7c n\u1ed1i ng\u1eafn \u0111\u1ea7u ra c\u1ee7a n\u00f3 v\u1edbi \u0111\u1ea5t ho\u00e0n to\u00e0n kh\u00f4ng t\u1ea1o ra b\u1ea5t k\u1ef3 \u0111\u01b0\u1eddng d\u1eabn d\u00f2ng \u0111i\u1ec7n b\u1ea5t th\u01b0\u1eddng n\u00e0o. T\u1ea3i \u0111\u01a1n gi\u1ea3n l\u00e0 \u0111\u01b0\u1ee3c k\u00edch ho\u1ea1t \u201cb\u1eadt\u201d b\u1ea5t k\u1ec3 c\u1ea3m bi\u1ebfn ph\u00e1t hi\u1ec7n \u0111\u01b0\u1ee3c g\u00ec, m\u1ed9t <strong>false B\u1eacT<\/strong>, v\u00e0 kh\u00f4ng c\u00f3 thi\u1ebft b\u1ecb n\u00e0o, \u1edf b\u1ea5t k\u1ef3 \u0111\u00e2u, ph\u1ea3n \u1ee9ng l\u1ea1i. M\u1ed9t v\u00ed d\u1ee5 \u0111i\u1ec3n h\u00ecnh v\u1ec1 s\u1ef1 c\u1ed1 l\u00e0 c\u1ea3m bi\u1ebfn m\u1ee9c ch\u1ea5t l\u1ecfng trong b\u1ec3 khi d\u00e2y t\u00edn hi\u1ec7u c\u1ee7a n\u00f3 b\u1ecb ch\u1ea1m \u0111\u1ea5t: m\u00e1y b\u01a1m v\u1eabn ti\u1ebfp t\u1ee5c ch\u1ea1y, kh\u00f4ng ai \u0111\u01b0\u1ee3c c\u1ea3nh b\u00e1o, v\u00e0 v\u1ea5n \u0111\u1ec1 ch\u1ec9 \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n khi b\u1ec3 b\u1ecb tr\u00e0n.<\/p>\n\n\n<div class=\"bp-2-fault bd-reveal\">\n <p class=\"bp-2-title\"><span class=\"rich-ico\" aria-hidden=\"true\"><svg class=\"ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><polygon points=\"13 2 3 14 12 14 11 22 21 10 12 10 13 2\"\/><\/svg><\/span>M\u1ed9t s\u1ef1 ng\u1eafn m\u1ea1ch v\u1edbi \u0111\u1ea5t c\u00f3 bi\u1ec3u hi\u1ec7n kh\u00e1c bi\u1ec7t<\/p>\n <div class=\"bp-2-grid\">\n <div class=\"bp-2-cell\">\n <p class=\"bp-2-celllabel\"><span class=\"cell-ico\" aria-hidden=\"true\"><svg class=\"ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"m2 2 20 20\"\/><path d=\"M5 5a1 1 0 0 0-1 1v7c0 5 3.5 7.5 7.67 8.94a1 1 0 0 0 .67.01c2.35-.82 4.48-1.97 5.9-3.71\"\/><path d=\"M9.309 3.652A12.252 12.252 0 0 0 11.24 2.28a1.17 1.17 0 0 1 1.52 0C14.51 3.81 17 5 19 5a1 1 0 0 1 1 1v7a9.784 9.784 0 0 1-.08 1.264\"\/><\/svg><\/span>\u0110\u1ea7u ra PNP b\u1ecb ng\u1eafn m\u1ea1ch v\u1edbi \u0111\u1ea5t<\/p>\n <p class=\"bp-2-cellline\">D\u00f2ng \u0111i\u1ec7n qu\u00e1 t\u1ea3i s\u1ebd l\u00e0m ng\u1eaft c\u1ea7u ch\u00ec ho\u1eb7c k\u00edch ho\u1ea1t c\u01a1 ch\u1ebf b\u1ea3o v\u1ec7 c\u1ee7a c\u1ea3m bi\u1ebfn, v\u00e0 s\u1ef1 c\u1ed1 s\u1ebd \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n.<\/p>\n <\/div>\n <div class=\"bp-2-cell\">\n <p class=\"bp-2-celllabel\"><span class=\"cell-ico\" aria-hidden=\"true\"><svg class=\"ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M7 16.3c2.2 0 4-1.83 4-4.05 0-1.16-.57-2.26-1.71-3.19S7.29 6.75 7 5.3c-.29 1.45-1.14 2.84-2.29 3.76S3 11.1 3 12.25c0 2.22 1.8 4.05 4 4.05z\"\/><path d=\"M12.56 6.6A10.97 10.97 0 0 0 14 3.02c.5 2.5 2 4.9 4 6.5s3 3.5 3 5.5a6.98 6.98 0 0 1-11.91 4.97\"\/><\/svg><\/span>\u0110\u1ea7u ra NPN b\u1ecb ng\u1eafn m\u1ea1ch v\u1edbi \u0111\u1ea5t<\/p>\n <p class=\"bp-2-cellline\">Kh\u00f4ng c\u00f3 d\u00f2ng \u0111i\u1ec7n b\u1ea5t th\u01b0\u1eddng; t\u1ea3i v\u1eabn ho\u1ea1t \u0111\u1ed9ng, m\u1ed9t tr\u1ea1ng th\u00e1i \u201cB\u1eacT\u201d gi\u1ea3 m\u1ea1o \u1ea9n \u0111i cho \u0111\u1ebfn khi b\u1ec3 tr\u00e0n.<\/p>\n <\/div>\n <\/div>\n<\/div>\n\n<p>S\u1ef1 b\u1ea5t \u0111\u1ed1i x\u1ee9ng n\u00e0y ch\u00ednh l\u00e0 n\u1ed9i dung th\u1ef1c s\u1ef1 \u1ea9n ch\u1ee9a \u0111\u1eb1ng sau kh\u1ea9u hi\u1ec7u \u201cPNP an to\u00e0n h\u01a1n\u201d. Kh\u00f4ng ph\u1ea3i l\u00e0 logic PNP v\u1ed1n d\u0129 kh\u00f4ng th\u1ec3 x\u1ea3y ra l\u1ed7i. M\u00e0 l\u00e0 khi x\u1ea3y ra l\u1ed7i ch\u1ea1m \u0111\u1ea5t tr\u00ean c\u00f4ng t\u1eafc ph\u00eda cao, l\u1ed7i \u0111\u00f3 s\u1ebd \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n, trong khi c\u00f9ng m\u1ed9t l\u1ed7i tr\u00ean c\u00f4ng t\u1eafc ph\u00eda th\u1ea5p l\u1ea1i \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 kh\u00f4ng ph\u00e1t ra t\u00edn hi\u1ec7u c\u1ea3nh b\u00e1o. Khi ai \u0111\u00f3 n\u00f3i v\u1edbi b\u1ea1n r\u1eb1ng NPN kh\u00f4ng an to\u00e0n, \u0111i\u1ec1u h\u1ecd th\u01b0\u1eddng mu\u1ed1n n\u00f3i l\u00e0: <em>C\u00e1c l\u1ed7i NPN kh\u00f3 ph\u00e1t hi\u1ec7n h\u01a1n khi ki\u1ec3m tra b\u1eb1ng m\u00e1y \u0111o v\u00e0 trong qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t.<\/em> \u0110\u00f3 l\u00e0 m\u1ed9t l\u1eadp lu\u1eadn li\u00ean quan \u0111\u1ebfn vi\u1ec7c kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1. \u0110\u1ed1i v\u1edbi c\u00e1c \u0111\u1ed9i b\u1ea3o tr\u00ec khi ki\u1ec3m tra c\u00e1c h\u1ed9p n\u1ed1i v\u1edbi m\u1ed9t \u0111\u1ea7u d\u00e2y \u0111o \u0111\u01b0\u1ee3c k\u1eb9p v\u00e0o \u0111\u1ea5t, \u0111\u00e2y l\u00e0 m\u1ed9t l\u1eadp lu\u1eadn r\u1ea5t thuy\u1ebft ph\u1ee5c, v\u00e0 ch\u00ednh v\u00ec l\u00fd do \u0111\u00f3 m\u00e0 PNP \u0111\u00e3 tr\u1edf th\u00e0nh ti\u00eau chu\u1ea9n trong c\u00e1c h\u1ec7 th\u1ed1ng l\u1eafp \u0111\u1eb7t m\u1edbi. Tuy nhi\u00ean, \u0111\u00e2y kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t \u0111\u1eb7c t\u00ednh an to\u00e0n v\u1ed1n c\u00f3 c\u1ee7a ch\u00ednh m\u1ea1ch logic, v\u00e0 b\u1ea1n n\u00ean bi\u1ebft \u0111i\u1ec1u n\u00e0y tr\u01b0\u1edbc khi ti\u1ebfn h\u00e0nh n\u1ed1i l\u1ea1i d\u00e2y cho m\u1ed9t m\u00e1y m\u00f3c \u0111ang ho\u1ea1t \u0111\u1ed9ng ch\u1ec9 d\u1ef1a tr\u00ean m\u1ed9t kh\u1ea9u hi\u1ec7u.<\/p>\n\n<h3>NO\/NC l\u00e0 m\u1ed9t tr\u1ee5c ri\u00eang bi\u1ec7t: tuy\u1ec7t \u0111\u1ed1i kh\u00f4ng \u0111\u01b0\u1ee3c g\u1ed9p chung v\u1edbi lo\u1ea1i \u0111\u1ea7u ra<\/h3>\n\n<p>Kh\u00e1i ni\u1ec7m \u201cth\u01b0\u1eddng m\u1edf\u201d v\u00e0 \u201cth\u01b0\u1eddng \u0111\u00f3ng\u201d kh\u00f4ng li\u00ean quan g\u00ec \u0111\u1ebfn s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa NPN v\u00e0 PNP. \u0110\u00e2y l\u00e0 hai th\u00f4ng s\u1ed1 \u0111\u1ed9c l\u1eadp, v\u00e0 b\u1ea3ng k\u1ebft h\u1ee3p c\u00f3 b\u1ed1n \u00f4 h\u1ee3p l\u1ec7, ch\u1ee9 kh\u00f4ng ph\u1ea3i hai:<\/p>\n\n<div class=\"rich-table-wrap bd-reveal\">\n <p class=\"rich-table-title\">NPN\/PNP v\u00e0 NO\/NC l\u00e0 c\u00e1c tr\u1ee5c \u0111\u1ed9c l\u1eadp<\/p>\n <div class=\"table-wrapper\">\n <table class=\"rich-table\">\n <thead>\n <tr><th><\/th><th>NPN (c\u00f4ng t\u1eafc ph\u00eda d\u01b0\u1edbi)<\/th><th>PNP (c\u00f4ng t\u1eafc ph\u00eda tr\u00ean)<\/th><\/tr>\n <\/thead>\n <tbody>\n <tr><td>NO (th\u01b0\u1eddng m\u1edf)<\/td><td>Khi ph\u00e1t hi\u1ec7n, \u0111i\u1ec7n \u00e1p gi\u1ea3m xu\u1ed1ng m\u1ee9c th\u1ea5p \u2192 \u0111\u1ea7u v\u00e0o \u1edf tr\u1ea1ng th\u00e1i B\u1eacT<\/td><td>Khi ph\u00e1t hi\u1ec7n, s\u1ebd g\u1eedi t\u00edn hi\u1ec7u 24 V \u2192 \u0111\u1ea7u v\u00e0o \u1edf tr\u1ea1ng th\u00e1i B\u1eacT<\/td><\/tr>\n <tr><td>NC (th\u01b0\u1eddng \u0111\u00f3ng)<\/td><td>S\u1ebd h\u1ea1 xu\u1ed1ng khi KH\u00d4NG ph\u00e1t hi\u1ec7n; s\u1ebd m\u1edf ra khi ph\u00e1t hi\u1ec7n<\/td><td>G\u1eedi t\u00edn hi\u1ec7u 24 V khi KH\u00d4NG ph\u00e1t hi\u1ec7n; m\u1edf khi ph\u00e1t hi\u1ec7n<\/td><\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n<\/div>\n\n<p>Schneider Electric \u0111\u00e3 n\u00eau r\u00f5 quan \u0111i\u1ec3m n\u00e0y trong ph\u1ea7n C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 PNP\/NPN: lo\u1ea1i \u0111\u1ea7u ra \u201ckh\u00f4ng li\u00ean quan g\u00ec \u0111\u1ebfn vi\u1ec7c c\u1ea3m bi\u1ebfn l\u00e0 lo\u1ea1i th\u01b0\u1eddng m\u1edf hay th\u01b0\u1eddng \u0111\u00f3ng\u201d. \u0110i\u1ec1u n\u00e0y ch\u1ec9 ph\u1ee5 thu\u1ed9c v\u00e0o thi\u1ebft k\u1ebf m\u1ea1ch b\u00ean trong. V\u00e0 hai tr\u1ee5c n\u00e0y c\u00f3 vai tr\u00f2 kh\u00e1c nhau trong tr\u01b0\u1eddng h\u1ee3p s\u1ef1 c\u1ed1. NO\/NC quy\u1ebft \u0111\u1ecbnh h\u01b0\u1edbng m\u00e0 d\u00e2y b\u1ecb \u0111\u1ee9t ho\u1eb7c c\u1ea3m bi\u1ebfn h\u1ecfng s\u1ebd g\u00e2y ra s\u1ef1 c\u1ed1 (m\u1edf = quy tr\u00ecnh d\u1eebng l\u1ea1i; \u0111\u00f3ng = quy tr\u00ecnh ti\u1ebfp t\u1ee5c). NPN\/PNP quy\u1ebft \u0111\u1ecbnh c\u00e1ch x\u1eed l\u00fd s\u1ef1 c\u1ed1 ch\u1ea1m \u0111\u1ea5t. N\u1ebfu b\u1ea1n \u0111\u1eb7t h\u00e0ng c\u1ea3m bi\u1ebfn ch\u1ec9 d\u1ef1a tr\u00ean m\u1ed9t tr\u1ee5c duy nh\u1ea5t, b\u1ea1n m\u1edbi ch\u1ec9 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c m\u1ed9t n\u1eeda th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a linh ki\u1ec7n.<\/p>\n\n<h3>B\u1ea1n \u0111ang c\u00f3 lo\u1ea1i kh\u00f4ng ph\u00f9 h\u1ee3p: lo\u1ea1i n\u00e0o th\u1ef1c s\u1ef1 hi\u1ec7u qu\u1ea3?<\/h3>\n\n<p>V\u1eady l\u00e0 c\u1ea3m bi\u1ebfn \u0111\u00e3 \u0111\u1ebfn, ho\u1eb7c \u0111\u00e3 \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t, nh\u01b0ng c\u1ea5u tr\u00fac c\u1ee7a n\u00f3 kh\u00f4ng ph\u00f9 h\u1ee3p v\u1edbi \u0111\u1ea7u v\u00e0o. Tr\u01b0\u1edbc khi b\u1ea1n chi tr\u1ea3 ph\u00ed v\u1eadn chuy\u1ec3n tr\u1ea3 l\u1ea1i, h\u00e3y t\u00ecm hi\u1ec3u c\u00e1c ph\u01b0\u01a1ng \u00e1n chuy\u1ec3n \u0111\u1ed5i v\u00e0 nh\u1eefng h\u1ea1n ch\u1ebf th\u1ef1c t\u1ebf c\u1ee7a ch\u00fang:<\/p>\n\n<div class=\"rich-table-wrap bd-reveal\">\n <p class=\"rich-table-title\">C\u00e1c t\u00f9y ch\u1ecdn chuy\u1ec3n \u0111\u1ed5i NPN\u2194PNP v\u00e0 gi\u1edbi h\u1ea1n c\u1ee7a ch\u00fang<\/p>\n <div class=\"table-wrapper\">\n <table class=\"rich-table\">\n <thead>\n <tr><th>T\u00f9y ch\u1ecdn<\/th><th>\u00c1p d\u1ee5ng cho<\/th><th>\u0110i\u1ec3m y\u1ebfu c\u1ee7a n\u00f3 l\u00e0 g\u00ec<\/th><th>Chi ph\u00ed<\/th><\/tr>\n <\/thead>\n <tbody>\n <tr><td>R\u01a1le giao di\u1ec7n (cu\u1ed9n d\u00e2y \u0111\u00f3ng vai tr\u00f2 l\u00e0 t\u1ea3i)<\/td><td>T\u00edn hi\u1ec7u c\u00f4ng t\u1eafc ch\u1eadm; \u0111i\u1ec7n \u00e1p cu\u1ed9n d\u00e2y ph\u00f9 h\u1ee3p<\/td><td>Th\u1eddi gian ph\u1ea3n h\u1ed3i c\u1ee7a r\u01a1le kho\u1ea3ng 10 ms kh\u00f4ng th\u1ec3 theo k\u1ecbp t\u1ed1c \u0111\u1ed9 \u0111\u1ebfm nhanh; tu\u1ed5i th\u1ecd cu\u1ed9n d\u00e2y c\u00f3 h\u1ea1n<\/td><td>Th\u1ea5p nh\u1ea5t<\/td><\/tr>\n <tr><td>B\u1ed9 gh\u00e9p quang<\/td><td>C\u1ea7n c\u00e1ch ly; t\u00edn hi\u1ec7u t\u1ed1c \u0111\u1ed9 trung b\u00ecnh<\/td><td>Ph\u1ea3i t\u00ednh to\u00e1n ng\u01b0\u1ee1ng d\u00f2ng \u0111i\u1ec7n ph\u00eda \u0111\u1ea7u v\u00e0o (kho\u1ea3ng 5\u201312 mA); th\u00eam hai b\u01b0\u1edbc n\u1ed1i d\u00e2y<\/td><td>Th\u1ea5p<\/td><\/tr>\n <tr><td>\u0110i\u1ec7n tr\u1edf k\u00e9o l\u00ean \/ k\u00e9o xu\u1ed1ng<\/td><td>Gi\u1ea3i ph\u00e1p t\u1ea1m th\u1eddi; x\u00e1c minh ki\u1ec3u<\/td><td>Kh\u00f4ng \u1ed5n \u0111\u1ecbnh: thay \u0111\u1ed5i theo nhi\u1ec7t \u0111\u1ed9, d\u00f2ng t\u1ea3i gi\u1edbi h\u1ea1n, ph\u1ea3n \u1ee9ng ch\u1eadm h\u01a1n; ch\u1ec9 ho\u1ea1t \u0111\u1ed9ng \u1edf t\u1ed1c \u0111\u1ed9 th\u1ea5p v\u00e0 t\u1ea3i nh\u1eb9<\/td><td>G\u1ea7n nh\u01b0 b\u1eb1ng kh\u00f4ng<\/td><\/tr>\n <tr><td>B\u1ed9 chuy\u1ec3n \u0111\u1ed5i chuy\u00ean d\u1ee5ng NPN\u2194PNP<\/td><td>Tr\u1ed9n d\u00e0i h\u1ea1n; t\u00edn hi\u1ec7u nhanh<\/td><td>Chi\u1ebfm ch\u1ed7 tr\u00ean \u0111\u01b0\u1eddng ray v\u00e0 m\u1ed9t khe c\u1eafm ngu\u1ed3n; th\u00eam m\u1ed9t b\u1ed9 ph\u1eadn c\u00f3 th\u1ec3 h\u1ecfng h\u00f3c<\/td><td>Trung b\u00ecnh<\/td><\/tr>\n <tr><td>C\u1ea3m bi\u1ebfn ch\u00ednh x\u00e1c<\/td><td>B\u1ea5t k\u1ef3 t\u00ecnh hu\u1ed1ng n\u00e0o<\/td><td>Th\u1eddi gian giao h\u00e0ng v\u00e0 ph\u00ed v\u1eadn chuy\u1ec3n tr\u1ea3 h\u00e0ng<\/td><td>T\u00f9y thu\u1ed9c v\u00e0o th\u1eddi gian giao h\u00e0ng<\/td><\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n<\/div>\n\n<p>M\u00f4 h\u00ecnh chung cho m\u1ecdi d\u00f2ng s\u1ea3n ph\u1ea9m: c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed chuy\u1ec3n \u0111\u1ed5i mang l\u1ea1i kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch v\u1edbi c\u00e1i gi\u00e1 l\u00e0 <strong>t\u1ed1c \u0111\u1ed9, s\u1ef1 \u0111\u01a1n gi\u1ea3n hay t\u00ednh b\u1ec1n v\u1eefng<\/strong>. M\u1ed9t \u0111i\u1ec7n tr\u1edf k\u00e9o l\u00ean c\u00f3 th\u1ec3 gi\u00fap c\u1ea3m bi\u1ebfn NPN \u0111i\u1ec1u khi\u1ec3n \u0111\u1ea7u v\u00e0o PNP. H\u00e3y h\u1ecfi b\u1ea5t k\u1ef3 k\u1ef9 s\u01b0 n\u00e0o tr\u00ean di\u1ec5n \u0111\u00e0n, b\u1ea1n s\u1ebd th\u1ea5y th\u1ee7 thu\u1eadt n\u00e0y \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng h\u00e0ng ng\u00e0y. Tuy nhi\u00ean, \u0111\u00e2y ch\u1ec9 l\u00e0 m\u1ed9t gi\u1ea3i ph\u00e1p t\u1ea1m th\u1eddi tr\u00ean b\u00e0n th\u00ed nghi\u1ec7m v\u1edbi nh\u1eefng h\u1ea1n ch\u1ebf th\u1ef1c t\u1ebf (d\u00f2ng t\u1ea3i, \u0111\u1ed9 tr\u00f4i nhi\u1ec7t \u0111\u1ed9, th\u1eddi gian \u0111\u00e1p \u1ee9ng), ch\u1ee9 kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t quy\u1ebft \u0111\u1ecbnh thi\u1ebft k\u1ebf. R\u01a1le giao di\u1ec7n ph\u00f9 h\u1ee3p cho t\u00edn hi\u1ec7u hi\u1ec7n di\u1ec7n thay \u0111\u1ed5i v\u00e0i l\u1ea7n m\u1ed7i ph\u00fat, nh\u01b0ng ho\u00e0n to\u00e0n v\u00f4 d\u1ee5ng \u0111\u1ed1i v\u1edbi b\u1ea5t k\u1ef3 \u1ee9ng d\u1ee5ng \u0111\u1ebfm nhanh n\u00e0o. C\u00e1c k\u1ef9 s\u01b0 \u1ee9ng d\u1ee5ng c\u1ee7a DigiKey l\u01b0u \u00fd r\u1eb1ng khi \u0111\u1eb7t h\u00e0ng sai linh ki\u1ec7n \u0111\u1ea7u ra, \u201cs\u1ebd t\u1ed1n r\u1ea5t nhi\u1ec1u c\u00f4ng s\u1ee9c \u0111\u1ec3 thi\u1ebft b\u1ecb ho\u1ea1t \u0111\u1ed9ng \u0111\u01b0\u1ee3c\u201d. N\u1ed7 l\u1ef1c n\u00e0y th\u01b0\u1eddng k\u1ebft th\u00fac b\u1eb1ng vi\u1ec7c b\u1ed9 chuy\u1ec3n \u0111\u1ed5i b\u1ecb h\u1ecfng ho\u1eb7c c\u1ea3m bi\u1ebfn b\u1ecb c\u1ea5t l\u1ea1i v\u00e0o h\u1ed9p. N\u1ebfu m\u00e1y m\u00f3c s\u1ebd ho\u1ea1t \u0111\u1ed9ng trong nhi\u1ec1u n\u0103m v\u1edbi c\u1ea3m bi\u1ebfn n\u00e0y, m\u00e3 s\u1ea3n ph\u1ea9m ch\u00ednh x\u00e1c s\u1ebd r\u1ebb h\u01a1n b\u1ea5t k\u1ef3 b\u1ed9 chuy\u1ec3n \u0111\u1ed5i th\u00f4ng minh n\u00e0o. H\u00e3y d\u00e0nh c\u00e1c gi\u1ea3i ph\u00e1p chuy\u1ec3n \u0111\u1ed5i cho kho\u1ea3ng th\u1eddi gian gi\u1eefa \u201cn\u00f3 \u0111ang h\u1ecfng\u201d v\u00e0 \u201cc\u1ea3m bi\u1ebfn \u0111\u00fang \u0111\u01b0\u1ee3c giao \u0111\u1ebfn\u201d.\u201d<\/p>\n\n<h2>D\u00e0nh cho c\u00e1c nh\u00e0 ph\u00e2n ph\u1ed1i: H\u00e3y d\u1ef1 tr\u1eef c\u1ea3 hai lo\u1ea1i, v\u00e0 h\u00e3y \u0111\u1eb7t hai c\u00e2u h\u1ecfi<\/h2>\n\n<p>M\u1ecdi tr\u01b0\u1eddng h\u1ee3p h\u1ecfng h\u00f3c n\u00eau tr\u00ean, s\u1edbm hay mu\u1ed9n, c\u0169ng s\u1ebd \u0111\u01b0\u1ee3c \u0111\u01b0a \u0111\u1ebfn qu\u1ea7y c\u1ee7a nh\u00e0 ph\u00e2n ph\u1ed1i. Ng\u01b0\u1eddi am hi\u1ec3u v\u1ec1 m\u00e1y m\u00f3c (b\u1ed9 ph\u1eadn b\u1ea3o tr\u00ec) v\u00e0 ng\u01b0\u1eddi \u0111\u1eb7t h\u00e0ng linh ki\u1ec7n (b\u1ed9 ph\u1eadn mua s\u1eafm) th\u01b0\u1eddng kh\u00f4ng ph\u1ea3i l\u00e0 c\u00f9ng m\u1ed9t ng\u01b0\u1eddi. Ng\u01b0\u1eddi \u0111\u1ee9ng gi\u1eefa ch\u00ednh l\u00e0 b\u1ea1n. Khi kh\u00e1ch h\u00e0ng y\u00eau c\u1ea7u \u201cc\u1ea3m bi\u1ebfn ti\u1ec7m c\u1eadn c\u1ea3m \u1ee9ng, 18 mm, NO\u201d, th\u00f4ng s\u1ed1 c\u00f2n thi\u1ebfu \u0111\u00f3 kh\u00f4ng ph\u1ea3i l\u00e0 do ng\u1eabu nhi\u00ean. Hai c\u00e2u h\u1ecfi c\u1ee7a b\u1ea1n s\u1ebd kh\u00e9p l\u1ea1i v\u00f2ng l\u1eb7p:<\/p>\n\n<div class=\"rich-card bd-reveal\">\n <p class=\"rich-card-title\"><span class=\"rich-ico\" aria-hidden=\"true\"><svg class=\"ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"m3 17 2 2 4-4\"\/><path d=\"m3 7 2 2 4-4\"\/><path d=\"M13 6h8\"\/><path d=\"M13 12h8\"\/><path d=\"M13 18h8\"\/><\/svg><\/span>Hai c\u00e2u h\u1ecfi gi\u00fap gi\u1ea3i quy\u1ebft m\u1ecdi \u0111\u01a1n h\u00e0ng NPN\/PNP<\/p>\n <ul class=\"rich-list\">\n <li><span class=\"rich-ico\" aria-hidden=\"true\"><svg class=\"ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M22 11.08V12a10 10 0 1 1-5.93-9.14\"\/><path d=\"m9 11 3 3L22 4\"\/><\/svg><\/span><span>\u0110\u1ea7u n\u1ed1i chung c\u1ee7a th\u1ebb \u0111\u1ea7u v\u00e0o c\u00f3 \u0111i\u1ec7n \u00e1p l\u00e0 bao nhi\u00eau: +24 V hay 0 V? (Kh\u00e1ch h\u00e0ng c\u00f3 th\u1ec3 tra c\u1ee9u th\u00f4ng tin n\u00e0y tr\u00ean th\u1ebb ho\u1eb7c trong h\u01b0\u1edbng d\u1eabn s\u1eed d\u1ee5ng PLC ch\u1ec9 trong m\u01b0\u1eddi gi\u00e2y.)<\/span><\/li>\n <li><span class=\"rich-ico\" aria-hidden=\"true\"><svg class=\"ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M22 11.08V12a10 10 0 1 1-5.93-9.14\"\/><path d=\"m9 11 3 3L22 4\"\/><\/svg><\/span><span>\u0110\u00e2y l\u00e0 thi\u1ebft b\u1ecb hi\u1ec7n c\u00f3 ph\u1ea3i kh\u00f4ng, v\u00e0 n\u00f3 \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t \u1edf \u0111\u00e2u? (C\u00e1c thi\u1ebft b\u1ecb s\u1ea3n xu\u1ea5t t\u1ea1i ch\u00e2u \u00c1 v\u00e0 thi\u1ebft b\u1ecb c\u0169 h\u1ea7u h\u1ebft \u0111\u1ec1u s\u1eed d\u1ee5ng c\u00f4ng ngh\u1ec7 NPN; trong khi \u0111\u00f3, c\u00e1c b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n m\u1edbi c\u1ee7a ch\u00e2u \u00c2u\/B\u1eafc M\u1ef9 h\u1ea7u h\u1ebft \u0111\u1ec1u s\u1eed d\u1ee5ng c\u00f4ng ngh\u1ec7 PNP.)<\/span><\/li>\n <\/ul>\n<\/div>\n\n<p>C\u1ea3 hai c\u00e2u h\u1ecfi n\u00e0y \u0111\u1ec1u kh\u00f4ng y\u00eau c\u1ea7u kh\u00e1ch h\u00e0ng ph\u1ea3i am hi\u1ec3u v\u1ec1 \u0111i\u1ec7n t\u1eed, v\u00e0 \u0111\u00f3 ch\u00ednh l\u00e0 l\u00fd do t\u1ea1i sao ch\u00fang c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c gi\u1ea3i quy\u1ebft ngay t\u1ea1i qu\u1ea7y. V\u00e0 h\u1ec7 qu\u1ea3 li\u00ean quan \u0111\u1ebfn vi\u1ec7c s\u1eafp x\u1ebfp h\u00e0ng h\u00f3a c\u0169ng xu\u1ea5t ph\u00e1t t\u1eeb c\u00f9ng m\u1ed9t logic:<\/p>\n\n<div class=\"rich-callout bd-reveal\">\n <p class=\"rich-callout-title\"><span class=\"rich-ico\" aria-hidden=\"true\"><svg class=\"ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M15 14c.2-1 .7-1.7 1.5-2.5 1-.9 1.5-2.2 1.5-3.5A6 6 0 0 0 6 8c0 1 .2 2.2 1.5 3.5.7.7 1.3 1.5 1.5 2.5\"\/><path d=\"M9 18h6\"\/><path d=\"M10 22h4\"\/><\/svg><\/span>T\u01b0 th\u1ebf \u0111\u1ee9ng v\u1edbi ch\u00e2n gi\u01a1 cao<\/p>\n <p>NPN kh\u00f4ng ph\u1ea3i l\u00e0 c\u00f4ng ngh\u1ec7 l\u1ed7i th\u1eddi v\u00e0 thua k\u00e9m nh\u01b0 nh\u1eefng g\u00ec lu\u1eadn \u0111i\u1ec7u \u201cPNP l\u00e0 ti\u00eau chu\u1ea9n\u201d th\u01b0\u1eddng m\u00f4 t\u1ea3. S\u1ed1 l\u01b0\u1ee3ng m\u00e1y m\u00f3c s\u1eed d\u1ee5ng c\u00f4ng ngh\u1ec7 NPN hi\u1ec7n c\u00f3 tr\u00ean th\u1ecb tr\u01b0\u1eddng s\u1eeda ch\u1eefa \u2013 t\u1eeb c\u00e1c d\u00f2ng m\u00e1y c\u0169 c\u1ee7a Nh\u1eadt B\u1ea3n \u0111\u1ebfn thi\u1ebft b\u1ecb s\u1ea3n xu\u1ea5t t\u1ea1i ch\u00e2u \u00c1 \u0111\u01b0\u1ee3c xu\u1ea5t kh\u1ea9u trong nhi\u1ec1u th\u1eadp k\u1ef7 \u2013 l\u00e0 r\u1ea5t l\u1edbn v\u00e0 s\u1ebd kh\u00f4ng bi\u1ebfn m\u1ea5t. M\u1ed9t nh\u00e0 ph\u00e2n ph\u1ed1i ph\u1ee5c v\u1ee5 kh\u00e1ch h\u00e0ng s\u1eeda ch\u1eefa m\u00e0 ch\u1ec9 nh\u1eadp h\u00e0ng PNP \u0111ang ng\u1ea7m b\u1ea3o nh\u1eefng kh\u00e1ch h\u00e0ng \u0111\u00f3 t\u00ecm \u0111\u1ebfn n\u01a1i kh\u00e1c; trong khi \u0111\u00f3, nh\u00e0 ph\u00e2n ph\u1ed1i n\u00e0o cung c\u1ea5p c\u1ea3 hai lo\u1ea1i c\u00f4ng ngh\u1ec7 n\u00e0y \u2013 v\u1edbi c\u00f9ng k\u00edch th\u01b0\u1edbc v\u1ecf v\u00e0 kho\u1ea3ng c\u00e1ch ph\u00e1t hi\u1ec7n \u2013 s\u1ebd b\u00e1n linh ki\u1ec7n thay th\u1ebf cho b\u1ea5t k\u1ef3 m\u00e1y m\u00f3c n\u00e0o \u0111\u01b0\u1ee3c mang \u0111\u1ebfn c\u1eeda h\u00e0ng.<\/p>\n<\/div>\n\n<p>Nh\u00e2n vi\u00ean b\u00e1n h\u00e0ng n\u00e0o c\u00f3 th\u1ec3 tr\u1ea3 l\u1eddi ngay l\u1eadp t\u1ee9c hai c\u00e2u h\u1ecfi n\u00e0y s\u1ebd bi\u1ebfn m\u1ed9t y\u00eau c\u1ea7u v\u1ec1 ph\u1ee5 t\u00f9ng th\u00e0nh \u0111\u01a1n \u0111\u1eb7t h\u00e0ng; c\u00f2n ng\u01b0\u1eddi n\u00e0o ch\u1ec9 nh\u00fan vai th\u00ec s\u1ebd khi\u1ebfn kh\u00e1ch h\u00e0ng chuy\u1ec3n sang truy c\u1eadp trang web c\u1ee7a \u0111\u1ed1i th\u1ee7 c\u1ea1nh tranh. Kh\u00e1ch h\u00e0ng s\u1ebd so s\u00e1nh b\u1ea1n v\u1edbi ch\u00edn nh\u00e0 b\u00e1n l\u1ebb kh\u00e1c \u0111ang b\u00e1n c\u00f9ng m\u1ed9t s\u1ea3n ph\u1ea9m c\u00f3 h\u00ecnh \u1ea3nh t\u01b0\u01a1ng t\u1ef1. C\u00e2u h\u1ecfi mang t\u00ednh \u0111\u1ecbnh h\u01b0\u1edbng k\u1ebft qu\u1ea3 ch\u00ednh l\u00e0 kho\u1ea3nh kh\u1eafc hi\u1ebfm hoi m\u00e0 ch\u00ednh chuy\u00ean m\u00f4n, ch\u1ee9 kh\u00f4ng ph\u1ea3i gi\u00e1 c\u1ea3, s\u1ebd gi\u00fap ch\u1ed1t \u0111\u01b0\u1ee3c \u0111\u01a1n h\u00e0ng.<\/p>\n\n<hr>\n\n<p><em>B\u1ea1n \u0111ang thay th\u1ebf ho\u1eb7c b\u1ed5 sung c\u1ea3m bi\u1ebfn v\u00e0 kh\u00f4ng ch\u1eafc m\u00e1y c\u1ea7n lo\u1ea1i NPN hay PNP? OMCH\u2019s <a href=\"https:\/\/www.omch.com\/vi\/product-selection\/\">h\u1ed7 tr\u1ee3 l\u1ef1a ch\u1ecdn s\u1ea3n ph\u1ea9m<\/a> t\u00ecm ki\u1ebfm c\u00e1c linh ki\u1ec7n t\u1ef1 \u0111\u1ed9ng h\u00f3a c\u00f4ng nghi\u1ec7p ph\u00f9 h\u1ee3p v\u1edbi th\u01b0\u01a1ng hi\u1ec7u, b\u1ea3n v\u1ebd ho\u1eb7c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a qu\u00fd kh\u00e1ch. Vui l\u00f2ng g\u1eedi th\u00f4ng tin chi ti\u1ebft v\u00e0 x\u00e1c nh\u1eadn lo\u1ea1i s\u1ea3n ph\u1ea9m ph\u00f9 h\u1ee3p tr\u01b0\u1edbc khi \u0111\u1eb7t h\u00e0ng.<\/em><\/p>\n\n\n<div class=\"bp-cta-end bd-reveal\">\n <p class=\"bp-cta-end-ttl\"><span class=\"rich-ico\" aria-hidden=\"true\"><svg class=\"ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M14.536 21.686a.5.5 0 0 0 .937-.024l6.5-19a.496.496 0 0 0-.635-.635l-19 6.5a.5.5 0 0 0-.024.937l7.93 3.18a2 2 0 0 1 1.112 1.11z\"\/><path d=\"m21.854 2.147-10.94 10.939\"\/><\/svg><\/span>C\u1ea7n NPN hay PNP \u2014 v\u00e0 chi\u1ebfc m\u00e1y n\u00e0o s\u1ebd quy\u1ebft \u0111\u1ecbnh?<\/p>\n <p class=\"bp-cta-end-sub\">H\u00e3y g\u1eedi cho ch\u00fang t\u00f4i th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt, m\u1eabu th\u1ebb ho\u1eb7c b\u1ea3n v\u1ebd. Qu\u00fd kh\u00e1ch s\u1ebd nh\u1eadn \u0111\u01b0\u1ee3c lo\u1ea1i \u0111\u1ea7u ra ph\u00f9 h\u1ee3p k\u00e8m theo b\u00e1o gi\u00e1.<\/p>\n <a class=\"bp-cta-end-btn\" href=\"https:\/\/www.omch.com\/vi\/contact\/\" target=\"_self\">G\u1eedi th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ea3m bi\u1ebfn c\u1ee7a b\u1ea1n<\/a>\n<\/div>\n\n<h2>T\u00e0i li\u1ec7u tham kh\u1ea3o<\/h2>\n<ol class=\"bd-refs\">\n <li>Schneider Electric. \u201c<a href=\"https:\/\/www.se.com\/us\/en\/faqs\/FA142566\/\" target=\"_blank\" rel=\"noopener\">S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa PNP v\u00e0 NPN khi m\u00f4 t\u1ea3 k\u1ebft n\u1ed1i c\u1ea3m bi\u1ebfn 3 d\u00e2y l\u00e0 g\u00ec?<\/a>\u201d C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p FA142566.<\/li>\n <li>DigiKey. \u201c<a href=\"https:\/\/forum.digikey.com\/t\/which-do-you-love-more-npn-or-pnp\/51317\" target=\"_blank\" rel=\"noopener\">B\u1ea1n th\u00edch lo\u1ea1i n\u00e0o h\u01a1n \u2014 NPN hay PNP?<\/a>\u201d H\u01b0\u1edbng d\u1eabn th\u1ef1c h\u00e0nh v\u1ec1 T\u1ef1 \u0111\u1ed9ng h\u00f3a C\u00f4ng nghi\u1ec7p, ch\u1ee7 \u0111\u1ec1 tr\u00ean di\u1ec5n \u0111\u00e0n.<\/li>\n <li>OMCH. \u201c<a href=\"https:\/\/www.omch.com\/vi\/product-selection\/\" target=\"_blank\" rel=\"noopener\">L\u1ef1a ch\u1ecdn s\u1ea3n ph\u1ea9m<\/a>.\u201d T\u00ecm ki\u1ebfm theo th\u01b0\u01a1ng hi\u1ec7u\/m\u1eabu m\u00e3, b\u1ea3n v\u1ebd ho\u1eb7c m\u1eabu s\u1ea3n ph\u1ea9m.<\/li>\n <li>OMCH. \u201c<a href=\"https:\/\/www.omch.com\/vi\/sensor-switches\/\" target=\"_blank\" rel=\"noopener\">C\u00f4ng t\u1eafc c\u1ea3m bi\u1ebfn<\/a>.\u201d D\u00f2ng s\u1ea3n ph\u1ea9m c\u1ea3m bi\u1ebfn ti\u1ec7m c\u1eadn v\u00e0 quang \u0111i\u1ec7n.<\/li>\n <li>OMCH. \u201c<a href=\"https:\/\/www.omch.com\/vi\/\" target=\"_blank\" rel=\"noopener\">Trang ch\u1ee7<\/a>.\u201d<\/li>\n<\/ol>\n\n<\/article>\n<\/div>\n\n<\/body>\n<\/html>","protected":false},"excerpt":{"rendered":"<p>\u0110\u1ea7u ra c\u1ea3m bi\u1ebfn NPN v\u00e0 PNP: Lo\u1ea1i n\u00e0o th\u1ef1c s\u1ef1 ph\u00f9 h\u1ee3p v\u1edbi b\u1ea1n? C\u1ea3m bi\u1ebfn thay th\u1ebf \u0111ang n\u1eb1m tr\u00ean b\u00e0n l\u00e0m vi\u1ec7c c\u1ee7a b\u1ea1n. V\u1ecf c\u1ea3m bi\u1ebfn gi\u1ed1ng h\u1ec7t, kho\u1ea3ng c\u00e1ch ph\u00e1t hi\u1ec7n gi\u1ed1ng h\u1ec7t, ba d\u00e2y d\u1eabn c\u0169ng gi\u1ed1ng h\u1ec7t \u2014 n\u00e2u, xanh d\u01b0\u01a1ng, \u0111en \u2014 nh\u01b0ng m\u00e1y v\u1eabn kh\u00f4ng nh\u1eadn di\u1ec7n \u0111\u01b0\u1ee3c n\u00f3. Trong qu\u00e1 tr\u00ecnh \u0111\u1eb7t h\u00e0ng, c\u00f3 m\u1ed9t c\u00e2u h\u1ecfi \u0111\u00e3 b\u1ecb b\u1ecf qua: NPN hay PNP? \u0110\u00e2y l\u00e0 sai l\u1ea7m r\u1ebb ti\u1ec1n nh\u1ea5t trong [\u2026]<\/p>","protected":false},"author":4,"featured_media":12184,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_seopress_robots_primary_cat":"none","_seopress_titles_title":"NPN vs. PNP Sensors: Key Differences & Wiring","_seopress_titles_desc":"Compare NPN and PNP sensor outputs, wiring and PLC compatibility. Learn how sourcing and sinking signals work and choose the right sensor.","_seopress_robots_index":"","footnotes":""},"categories":[79],"tags":[],"class_list":["post-12178","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mmlblog"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/posts\/12178","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/comments?post=12178"}],"version-history":[{"count":1,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/posts\/12178\/revisions"}],"predecessor-version":[{"id":12185,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/posts\/12178\/revisions\/12185"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/media\/12184"}],"wp:attachment":[{"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/media?parent=12178"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/categories?post=12178"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/tags?post=12178"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}