{"id":12233,"date":"2026-09-09T09:55:11","date_gmt":"2026-09-09T09:55:11","guid":{"rendered":"https:\/\/www.omch.com\/?p=12233"},"modified":"2026-09-09T09:55:12","modified_gmt":"2026-09-09T09:55:12","slug":"relay-coil-voltage","status":"publish","type":"post","link":"https:\/\/www.omch.com\/vi\/relay-coil-voltage\/","title":{"rendered":"Gi\u1ea3i th\u00edch v\u1ec1 \u0111i\u1ec7n \u00e1p cu\u1ed9n d\u00e2y r\u01a1le: C\u00e1ch \u0111\u1ecdc, l\u1ef1a ch\u1ecdn v\u00e0 ph\u1ed1i h\u1ee3p"},"content":{"rendered":"\n\n \n \n Gi\u1ea3i th\u00edch v\u1ec1 \u0111i\u1ec7n \u00e1p cu\u1ed9n d\u00e2y r\u01a1le: \u00dd ngh\u0129a c\u1ee7a con s\u1ed1 tr\u00ean v\u1ecf (v\u00e0 c\u00e1ch ch\u1ecdn sao cho ph\u00f9 h\u1ee3p)<\/title>\n<\/head>\n<body>\n<!-- \u2193\u2193\u2193 The deployable fragment begins here. \u2193\u2193\u2193 -->\n<div class=\"bd-post\">\n <style>\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 \/* Brand Standard Blog CSS Header \u2014 verbatim values (origin-design OMCH) *\/\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 \/* palette (design-plan 2026-09-04) \u2014 solid hexes, single source *\/\n --body-bg: #FFFFFF;\n --heading-ink: #000000;\n --text-primary: #333333;\n --text-secondary: #6E6E6E;\n --accent-text: #2A76B4;\n --accent-hot: #FD9649;\n --card-fill: #FAFAFA;\n --card-border: #E0E0E0;\n --inverse-bg: #1E1E1E;\n --inverse-text: #FFFFFF;\n --inverse-text-2: #B0B0B0;\n --inverse-accent: #6FB3EA;\n --btn-white: #FFFFFF;\n --btn-ink: #333333;\n \/* FIXED prose spacing standard \u2014 identical in every article: *\/\n --prose-width: 760px;\n --gap-normal: 32px;\n --gap-section: 48px;\n --pad-compact: 16px;\n --pad-standard: 24px;\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 \/* ANCHOR PERMIT-LIST: visual props only via content forms below *\/\n .bd-post p a, .bd-post li a, .bd-post blockquote a, .bd-post td a {\n color: var(--accent-text);\n text-decoration: underline;\n text-underline-offset: 2px;\n }\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\n \/* PROSE SPACING \u2014 FIXED STANDARD. px margins; nothing inherited from host. *\/\n .bd-post p { margin: 0 0 1em; }\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 ul, .bd-post ol { margin: 0 0 1em; padding-left: 1.5em; }\n .bd-post li { margin-bottom: 0.5em; }\n .bd-post strong { font-weight: 700; }\n .bd-post em { font-style: italic; }\n .bd-post code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 0.9em; background: var(--card-fill); border: 1px solid var(--card-border); border-radius: 4px; padding: 1px 6px; color: var(--text-primary); }\n\n .bd-post [class*=\"bp-\"] { box-sizing: border-box; }\n .bd-post [class*=\"rich-\"] { box-sizing: border-box; }\n .bd-post .bd-post-article > .rich-multicol,\n .bd-post .bd-post-article > .rich-stats,\n .bd-post .bd-post-article > .bd-supply-map,\n .bd-post .bd-post-article > .bp-cta-end { margin: var(--gap-normal) 0; }\n .bd-post .bd-post-article > .bd-field-rule { margin: var(--gap-section) 0 var(--gap-normal); }\n\n \/* Tables \u2014 global prose style (md tables + comparison tables share it) *\/\n .bd-post .table-wrapper { overflow-x: auto; margin: 0 0 1em; }\n .bd-post table.rich-table { width: 100%; border-collapse: collapse; font-size: 16px; line-height: 1.5; }\n .bd-post .rich-table-cap { font-family: \"Roboto\", sans-serif; font-weight: 700; font-size: 18px; color: var(--heading-ink); text-align: left; margin: 0 0 8px; }\n .bd-post table.rich-table th { background: var(--card-fill); color: var(--heading-ink); font-weight: 700; text-align: left; padding: 12px 14px; border: 1px solid var(--card-border); border-bottom: 2px solid var(--accent-text); }\n .bd-post table.rich-table td { padding: 12px 14px; border: 1px solid var(--card-border); color: var(--text-primary); vertical-align: top; }\n .bd-post table.rich-table td strong { color: var(--heading-ink); }\n\n \/* ===== RICH: \u00a71 \u6f84\u6e05\u5361 (low box: card-fill + border + accent left bar) ===== *\/\n .bd-post .rich-multicol { background: var(--card-fill); border: 1px solid var(--card-border); border-left: 4px solid var(--accent-text); border-radius: 10px; padding: var(--pad-standard); display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }\n .bd-post .rich-multicol-h { font-family: \"Roboto\", sans-serif; font-weight: 700; font-size: 17px; color: var(--heading-ink); margin: 0 0 8px; }\n .bd-post .rich-multicol-ic { display: inline-flex; vertical-align: -0.2em; margin-right: 8px; color: var(--accent-text); }\n .bd-post .rich-multicol-p { margin: 0; color: var(--text-primary); }\n\n \/* ===== RICH: \u00a72 \u8bb0\u5fc6\u94a9\u5b50\u7b7e\u540d\u5757 Card-Stats ===== *\/\n .bd-post .rich-stats { background: var(--card-fill); border: 1px solid var(--card-border); border-radius: 10px; padding: var(--pad-standard); }\n .bd-post .rich-stats-title { font-family: \"Roboto\", sans-serif; font-weight: 700; font-size: 17px; color: var(--heading-ink); margin: 0 0 12px; }\n .bd-post .rich-stats-ic { display: inline-flex; vertical-align: -0.2em; margin-right: 8px; color: var(--accent-text); }\n .bd-post .rich-stats-num { font-family: \"Roboto\", sans-serif; font-weight: 700; font-size: 44px; line-height: 1.1; color: var(--accent-text); margin: 0 0 4px; }\n .bd-post .rich-stats-sub { margin: 0; color: var(--text-secondary); }\n .bd-post .rich-stats-cap { margin: 8px 0 0; color: var(--text-primary); }\n\n \/* ===== BP-1: \u00a74 \u4f9b\u7535\u4e16\u754c\u5bf9\u7167\u5361 (medium card) ===== *\/\n .bd-post .bd-supply-map { background: var(--card-fill); border: 1px solid var(--card-border); border-radius: 10px; padding: 8px var(--pad-standard); }\n .bd-post .bd-supply-row { display: flex; align-items: flex-start; gap: 16px; padding: 14px 0; border-bottom: 1px solid var(--card-border); }\n .bd-post .bd-supply-row:last-child { border-bottom: none; }\n .bd-post .bd-supply-ic { color: var(--accent-text); display: inline-flex; flex: 0 0 auto; align-self: flex-start; }\n .bd-post .bd-supply-mid { flex: 1.4; min-width: 0; }\n .bd-post .bd-supply-chg { flex: 1; min-width: 0; margin: 0; color: var(--text-primary); }\n .bd-post .bd-supply-who-name { font-family: \"Roboto\", sans-serif; font-weight: 700; font-size: 16px; color: var(--heading-ink); margin: 0 0 2px; transition: color .2s ease-out; }\n .bd-post .bd-supply-who-desc { margin: 0; color: var(--text-secondary); font-size: 14px; }\n .bd-post .bd-supply-row:hover .bd-supply-who-name { color: var(--accent-text); }\n\n \/* ===== BP-2: \u00a75 \u94c1\u5f8b\u5f15\u53e5 (L0 recipe a \u2014 pure typography) ===== *\/\n .bd-post .bd-field-rule { border-left: 4px solid var(--accent-text); padding: 4px 0 4px 20px; }\n .bd-post .bd-field-rule-label { display: block; font-size: 13px; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent-text); margin: 0 0 6px; }\n .bd-post .bd-field-rule-quote { font-family: \"Manrope\", sans-serif; font-weight: 600; font-size: 22px; line-height: 1.35; color: var(--heading-ink); margin: 0; }\n\n \/* ===== BP-cta-end (colors: cta-states(end)) ===== *\/\n .bd-post .bp-cta-end { background: var(--inverse-bg); border-radius: 12px; padding: 28px 24px; }\n .bd-post .bp-cta-end-inner { max-width: 560px; margin: 0 auto; text-align: center; }\n .bd-post .bp-cta-end-title { font-family: \"Roboto\", sans-serif; font-weight: 700; font-size: 26px; line-height: 1.25; color: var(--inverse-text); margin: 0; }\n .bd-post .bp-cta-end-ic { display: inline-flex; vertical-align: -0.2em; margin-right: 8px; color: var(--inverse-accent); }\n .bd-post .bp-cta-end-sub { font-size: 16px; color: var(--inverse-text-2); margin: 8px 0 0; }\n .bd-post .bp-cta-end-btn { display: inline-flex; align-items: center; gap: 8px; margin-top: 20px; font-family: \"Roboto\", sans-serif; font-weight: 600; font-size: 16px; line-height: 1; text-decoration: none; border-radius: 4px; padding: 13px 24px; background: var(--accent-hot); color: var(--btn-ink); transition: background .2s ease-out, color .2s ease-out, transform .2s ease-out; }\n .bd-post .bp-cta-end-btn:hover { background: var(--btn-white); color: var(--btn-ink); }\n .bd-post .bp-cta-end-arrow { display: inline-flex; transition: transform .2s ease-out; }\n .bd-post .bp-cta-end-btn:hover .bp-cta-end-arrow { transform: translateX(2px); }\n\n \/* ===== Sanctioned motion \u2014 CSS-only, gated ===== *\/\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 .bd-supply-map { transition: transform .2s ease-out, box-shadow .2s ease-out; }\n .bd-post .bd-supply-map:hover { transform: translateY(-2px); box-shadow: 0 6px 18px rgba(0, 0, 0, 0.08); }\n .bd-post .bp-cta-end { transition: transform .2s ease-out, box-shadow .2s ease-out; }\n .bd-post .bp-cta-end:hover { transform: translateY(-2px); box-shadow: 0 8px 22px rgba(0, 0, 0, 0.14); }\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 }\n\n @media (max-width: 767px) {\n .bd-post { padding: 16px; }\n .bd-post h2 { font-size: 26px; margin-top: 32px; }\n .bd-post h3 { font-size: 20px; margin-top: 24px; }\n .bd-post .rich-multicol { grid-template-columns: 1fr; gap: 16px; padding: var(--pad-compact); }\n .bd-post .rich-stats { padding: var(--pad-compact); }\n .bd-post .rich-stats-num { font-size: 34px; }\n .bd-post .bd-supply-map { padding: 8px var(--pad-compact); }\n .bd-post .bd-supply-row { flex-wrap: wrap; gap: 6px 12px; }\n .bd-post .bd-supply-ic { width: 32px; }\n .bd-post .bd-supply-mid { flex: 1 1 calc(100% - 44px); }\n .bd-post .bd-supply-chg { flex: 1 1 100%; }\n .bd-post .bd-field-rule-quote { font-size: 19px; }\n .bd-post .bp-cta-end { padding: var(--pad-compact); }\n .bd-post .bp-cta-end-title { font-size: 22px; }\n .bd-post .bp-cta-end-sub { font-size: 15px; }\n }\n <\/style>\n <article class=\"bd-post-article\">\n\n <p>M\u1ed9t v\u1ecf r\u01a1le c\u00f3 hai m\u1ee9c \u0111i\u1ec7n \u00e1p: \u201c24 VDC\u201d v\u00e0 \u201c250 VAC 10 A\u201d. M\u1ee9c \u0111i\u1ec7n \u00e1p \u0111\u1ea7u ti\u00ean c\u1ea5p ngu\u1ed3n cho r\u01a1le; m\u1ee9c \u0111i\u1ec7n \u00e1p th\u1ee9 hai l\u00e0 m\u1ee9c \u0111i\u1ec7n \u00e1p m\u00e0 r\u01a1le \u0111i\u1ec1u khi\u1ec3n. Vi\u1ec7c nh\u1ea7m l\u1eabn gi\u1eefa hai \u0111i\u1ec7n \u00e1p n\u00e0y l\u00e0 sai l\u1ea7m ph\u1ed5 bi\u1ebfn nh\u1ea5t khi s\u1eed d\u1ee5ng r\u01a1le trong th\u1ef1c t\u1ebf, v\u00e0 h\u1eadu qu\u1ea3 l\u00e0 cu\u1ed9n d\u00e2y b\u1ecb ch\u00e1y, r\u01a1le kh\u00f4ng th\u1ec3 k\u00edch ho\u1ea1t ho\u1eb7c \u0111\u01a1n h\u00e0ng b\u1ecb tr\u1ea3 l\u1ea1i. H\u01b0\u1edbng d\u1eabn n\u00e0y gi\u1ea3i th\u00edch \u0111i\u1ec7n \u00e1p cu\u1ed9n d\u00e2y r\u01a1le l\u00e0 g\u00ec, c\u00e1ch \u0111\u1ecdc th\u00f4ng s\u1ed1 n\u00e0y tr\u00ean b\u1ea3ng d\u1eef li\u1ec7u k\u1ef9 thu\u1eadt, c\u00e1ch ki\u1ec3m tra r\u01a1le ho\u1ea1t \u0111\u1ed9ng b\u1ea5t th\u01b0\u1eddng, v\u00e0 \u00fd ngh\u0129a c\u1ee7a d\u1ea3i \u0111i\u1ec7n \u00e1p cu\u1ed9n d\u00e2y n\u1ebfu b\u1ea1n l\u01b0u kho r\u01a1le v\u1edbi s\u1ed1 l\u01b0\u1ee3ng l\u1edbn.<\/p>\n\n <h2>\u0110i\u1ec7n \u00e1p cu\u1ed9n d\u00e2y r\u01a1le: Con s\u1ed1 tr\u00ean v\u1ecf th\u1ef1c s\u1ef1 c\u00f3 \u00fd ngh\u0129a g\u00ec<\/h2>\n <p>R\u01a1le l\u00e0 m\u1ed9t c\u00f4ng t\u1eafc ho\u1ea1t \u0111\u1ed9ng nh\u1edd t\u1eeb tr\u01b0\u1eddng. Khi cho d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua cu\u1ed9n d\u00e2y b\u00ean trong, cu\u1ed9n d\u00e2y s\u1ebd tr\u1edf th\u00e0nh m\u1ed9t nam ch\u00e2m \u0111i\u1ec7n, k\u00e9o c\u00e1nh ti\u1ebfp \u0111i\u1ec3m \u0111\u00f3ng l\u1ea1i; khi ng\u1eaft d\u00f2ng \u0111i\u1ec7n, l\u00f2 xo s\u1ebd \u0111\u1ea9y c\u00e1nh ti\u1ebfp \u0111i\u1ec3m tr\u1edf l\u1ea1i v\u1ecb tr\u00ed ban \u0111\u1ea7u. Do \u0111\u00f3, c\u00f3 hai m\u1ee9c \u0111i\u1ec7n \u00e1p:<\/p>\n <ul>\n <li><strong>\u0110i\u1ec7n \u00e1p cu\u1ed9n d\u00e2y r\u01a1le<\/strong> l\u00e0 \u0111i\u1ec7n \u00e1p \u0111\u01b0\u1ee3c n\u1ed1i gi\u1eefa hai c\u1ef1c c\u1ee7a cu\u1ed9n d\u00e2y \u0111\u1ec3 t\u1ea1o t\u1eeb tr\u01b0\u1eddng cho nam ch\u00e2m. \u0110\u00e2y ch\u00ednh l\u00e0 \u201cngu\u1ed3n n\u0103ng l\u01b0\u1ee3ng\u201d c\u1ee7a r\u01a1-le: n\u1ebfu c\u1ea5p ngu\u1ed3n kh\u00f4ng \u0111\u00fang, n\u00f3 s\u1ebd t\u1eeb ch\u1ed1i ho\u1ea1t \u0111\u1ed9ng, ho\u1eb7c th\u1eadm ch\u00ed g\u00e2y ra h\u1eadu qu\u1ea3 nghi\u00eam tr\u1ecdng h\u01a1n.<\/li>\n <li><strong>\u0110\u00e1nh gi\u00e1 li\u00ean h\u1ec7<\/strong> l\u00e0 \u0111i\u1ec7n \u00e1p v\u00e0 c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n m\u00e0 c\u00e1c ti\u1ebfp \u0111i\u1ec3m c\u00f3 th\u1ec3 \u0111\u00f3ng\/m\u1edf an to\u00e0n sau khi cu\u1ed9n d\u00e2y \u0111\u00e3 h\u00fat v\u00e0o. D\u1ea5u hi\u1ec7u \u201c250 VAC 10 A\u201d kh\u00f4ng li\u00ean quan g\u00ec \u0111\u1ebfn cu\u1ed9n d\u00e2y.<\/li>\n <\/ul>\n <p>V\u00ec v\u1eady, m\u1ed9t r\u01a1le c\u00f3 in c\u1ea3 hai k\u00fd hi\u1ec7u n\u00e0y c\u1ea7n ngu\u1ed3n \u0111i\u1ec7n 24 V DC cho cu\u1ed9n d\u00e2y v\u00e0 sau \u0111\u00f3 c\u00f3 th\u1ec3 \u0111i\u1ec1u khi\u1ec3n t\u1ea3i 250 VAC, 10 A qua c\u00e1c ti\u1ebfp \u0111i\u1ec3m c\u1ee7a n\u00f3. Ngu\u1ed3n 24 V kh\u00f4ng bao gi\u1edd ti\u1ebfp x\u00fac v\u1edbi t\u1ea3i; ngu\u1ed3n 250 V c\u0169ng kh\u00f4ng bao gi\u1edd ti\u1ebfp x\u00fac v\u1edbi cu\u1ed9n d\u00e2y.<\/p>\n\n <!-- RICH: Callout-MultiColumn -->\n <div class=\"rich-multicol\">\n <div>\n <p class=\"rich-multicol-h\"><span class=\"rich-multicol-ic\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" aria-hidden=\"true\"><circle cx=\"12\" cy=\"12\" r=\"10\"\/><path d=\"M12 16v-4\"\/><path d=\"M12 8h.01\"\/><\/svg><\/span>\u0110i\u1ec7n \u00e1p cu\u1ed9n d\u00e2y (cung c\u1ea5p \u0111i\u1ec7n cho nam ch\u00e2m)<\/p>\n <p class=\"rich-multicol-p\">C\u00e1c gi\u00e1 tr\u1ecb \u0111i\u1ec3n h\u00ecnh: 5, 12, 24, 48 VDC; 24, 110, 120, 220\u2013240 VAC<\/p>\n <\/div>\n <div>\n <p class=\"rich-multicol-h\">D\u00f2ng \u0111\u1ecbnh m\u1ee9c ti\u1ebfp \u0111i\u1ec3m (\u0111i\u1ec1u khi\u1ec3n t\u1ea3i)<\/p>\n <p class=\"rich-multicol-p\">C\u00e1c gi\u00e1 tr\u1ecb \u0111i\u1ec3n h\u00ecnh: 250 VAC 10 A, 30 VDC 5 A. \u201cT\u00f4i c\u1ea7n lo\u1ea1i n\u00e0o?\u201d l\u00e0 c\u00e2u h\u1ecfi li\u00ean quan \u0111\u1ebfn cu\u1ed9n d\u00e2y, kh\u00f4ng ph\u1ea3i c\u00e2u h\u1ecfi li\u00ean quan \u0111\u1ebfn ti\u1ebfp \u0111i\u1ec3m<\/p>\n <\/div>\n <\/div>\n\n <p>Hai \u0111i\u1ec1u c\u1ea7n l\u01b0u \u00fd tr\u01b0\u1edbc khi b\u1ea1n ti\u1ebfp t\u1ee5c. Cu\u1ed9n d\u00e2y c\u00f3 c\u00e1c m\u1ee9c \u0111i\u1ec7n \u00e1p kh\u00e1c nhau <em>c\u00e1c phi\u00ean b\u1ea3n<\/em>: c\u00f9ng m\u1ed9t m\u1eabu c\u01a1 b\u1ea3n \u0111\u01b0\u1ee3c trang b\u1ecb cu\u1ed9n d\u00e2y 24 VDC, cu\u1ed9n d\u00e2y 12 VDC, cu\u1ed9n d\u00e2y 220 VAC, v.v. B\u1ea1n n\u00ean ch\u1ecdn phi\u00ean b\u1ea3n c\u00f3 cu\u1ed9n d\u00e2y ph\u00f9 h\u1ee3p v\u1edbi \u0111i\u1ec7n \u00e1p m\u00e0 b\u1ea1n th\u1ef1c t\u1ebf c\u00f3 th\u1ec3 cung c\u1ea5p. Nguy\u00ean t\u1eafc n\u00e0y c\u0169ng \u00e1p d\u1ee5ng cho c\u00f4ng t\u1eafc t\u01a1 (contactor) \u2013 m\u1ed9t linh ki\u1ec7n c\u00f9ng lo\u1ea1i \u2013 nh\u01b0ng h\u01b0\u1edbng d\u1eabn n\u00e0y ch\u1ec9 t\u1eadp trung v\u00e0o r\u01a1le.<\/p>\n\n <h2>C\u00e1ch \u0111\u1ecdc th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt v\u1ec1 \u0111i\u1ec7n \u00e1p cu\u1ed9n d\u00e2y<\/h2>\n <p>B\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a r\u01a1le li\u1ec7t k\u00ea t\u1ed1i \u0111a b\u1ed1n m\u1ee9c \u0111i\u1ec7n \u00e1p cu\u1ed9n d\u00e2y, v\u00e0 ch\u00fang gi\u00fap tr\u1ea3 l\u1eddi c\u00e1c c\u00e2u h\u1ecfi kh\u00e1c nhau:<\/p>\n <div class=\"table-wrapper\">\n <table class=\"rich-table\">\n <thead>\n <tr><th scope=\"col\">Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt<\/th><th scope=\"col\">\u0110i\u1ec1u n\u00e0y \u0111\u1ea3m b\u1ea3o \u0111i\u1ec1u g\u00ec<\/th><th scope=\"col\">V\u00ed d\u1ee5 (cu\u1ed9n d\u00e2y 12 VDC)<\/th><\/tr>\n <\/thead>\n <tbody>\n <tr><td>\u0110i\u1ec7n \u00e1p \u0111\u1ecbnh m\u1ee9c (danh \u0111\u1ecbnh) c\u1ee7a cu\u1ed9n d\u00e2y<\/td><td>Ti\u00eau chu\u1ea9n thi\u1ebft k\u1ebf m\u00e0 cu\u1ed9n d\u00e2y \u0111\u01b0\u1ee3c ch\u1ebf t\u1ea1o theo<\/td><td>12 VDC<\/td><\/tr>\n <tr><td>\u0110i\u1ec7n \u00e1p t\u1ed1i \u0111a \u0111\u1ec3 thi\u1ebft b\u1ecb ho\u1ea1t \u0111\u1ed9ng<\/td><td>Ph\u00eda tr\u00ean b\u1ed9 r\u01a1-le n\u00e0y, <strong>ph\u1ea3i<\/strong> k\u00e9o v\u00e0o<\/td><td>9 V max (75 % so v\u1edbi c\u00f4ng su\u1ea5t \u0111\u1ecbnh m\u1ee9c)<\/td><\/tr>\n <tr><td>\u0110i\u1ec7n \u00e1p ng\u01b0\u1ee1ng ng\u1eaft (t\u1ed1i thi\u1ec3u)<\/td><td>Ph\u00eda d\u01b0\u1edbi \u0111\u00e2y l\u00e0 r\u01a1-le <strong>ph\u1ea3i<\/strong> b\u1ecf h\u1ecdc<\/td><td>1,2 V t\u1ed1i thi\u1ec3u (10 % so v\u1edbi gi\u00e1 tr\u1ecb \u0111\u1ecbnh m\u1ee9c)<\/td><\/tr>\n <tr><td>\u0110i\u1ec7n \u00e1p cu\u1ed9n d\u00e2y t\u1ed1i \u0111a cho ph\u00e9p<\/td><td>Ngo\u00e0i ra, vi\u1ec7c v\u1eadn h\u00e0nh li\u00ean t\u1ee5c c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn nguy c\u01a1 qu\u00e1 nhi\u1ec7t<\/td><td>Li\u00ean quan \u0111\u1ebfn b\u1ea3ng d\u1eef li\u1ec7u, ph\u1ee5 thu\u1ed9c v\u00e0o nhi\u1ec7t \u0111\u1ed9<\/td><\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n <p>Kho\u1ea3ng c\u00e1ch gi\u1eefa h\u00e0ng th\u1ee9 hai v\u00e0 h\u00e0ng th\u1ee9 ba ch\u00ednh l\u00e0 ch\u00eca kh\u00f3a: gi\u1eefa \u201cph\u1ea3i th\u1ea3\u201d v\u00e0 \u201cph\u1ea3i v\u1eadn h\u00e0nh\u201d l\u00e0 m\u1ed9t <em>c\u00e1c ban nh\u1ea1c ch\u01b0a x\u00e1c \u0111\u1ecbnh<\/em> trong \u0111\u00f3 r\u01a1le c\u00f3 th\u1ec3 v\u1eabn gi\u1eef tr\u1ea1ng th\u00e1i ho\u1eb7c c\u00f3 th\u1ec3 chuy\u1ec3n m\u1ea1ch, n\u00ean b\u1ea1n kh\u00f4ng th\u1ec3 tin t\u01b0\u1edfng v\u00e0o c\u1ea3 hai tr\u01b0\u1eddng h\u1ee3p n\u00e0y. Trong v\u00ed d\u1ee5 tr\u00ean, d\u1ea3i \u0111i\u1ec7n \u00e1p \u0111\u00f3 n\u1eb1m trong kho\u1ea3ng t\u1eeb 1,2 V \u0111\u1ebfn 9 V, c\u00f3 ngh\u0129a l\u00e0 thi\u1ebft b\u1ecb ch\u1ec9 ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh \u1edf m\u1ee9c tr\u00ean 9 V, ch\u1ee9 kh\u00f4ng ph\u1ea3i \u1edf \u201cb\u1ea5t k\u1ef3 m\u1ee9c n\u00e0o d\u01b0\u1edbi 12\u201d.\u201d<\/p>\n\n <!-- RICH: Card-Stats (\ud83d\udd16 \u8bb0\u5fc6\u94a9\u5b50\u7b7e\u540d\u5757) -->\n <div class=\"rich-stats bd-reveal\">\n <p class=\"rich-stats-title\"><span class=\"rich-stats-ic\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" aria-hidden=\"true\"><polyline points=\"22 7 13.5 15.5 8.5 10.5 2 17\"\/><polyline points=\"16 7 22 7 22 13\"\/><\/svg><\/span>Quy t\u1eafc 75 %<\/p>\n <p class=\"rich-stats-num\">B\u1ea3y m\u01b0\u01a1i l\u0103m pound ba pence<\/p>\n <p class=\"rich-stats-sub\">c\u1ee7a \u0111i\u1ec7n \u00e1p \u0111\u1ecbnh m\u1ee9c: \u0111i\u1ec3m k\u00edch ho\u1ea1t ti\u00eau bi\u1ec3u \u0111\u1ed1i v\u1edbi cu\u1ed9n d\u00e2y r\u01a1le m\u1ed9t chi\u1ec1u (9 V \u0111\u1ed1i v\u1edbi cu\u1ed9n d\u00e2y 12 V, kho\u1ea3ng 18 V \u0111\u1ed1i v\u1edbi cu\u1ed9n d\u00e2y 24 V)<\/p>\n <p class=\"rich-stats-cap\">Ngo\u00e0i nh\u1eefng \u0111i\u1ec1u tr\u00ean, nh\u00e0 s\u1ea3n xu\u1ea5t kh\u00f4ng \u0111\u1ea3m b\u1ea3o b\u1ea5t c\u1ee9 \u0111i\u1ec1u g\u00ec: tr\u00ean th\u1ef1c t\u1ebf, r\u01a1le c\u00f3 hi\u1ec7n t\u01b0\u1ee3ng rung l\u1eafc ho\u1eb7c kh\u00f4ng bao gi\u1edd \u0111\u00f3ng l\u1ea1i.<\/p>\n <\/div>\n\n <p>Con s\u1ed1 75 % ch\u00ednh l\u00e0 th\u00f4ng s\u1ed1 h\u1eefu \u00edch nh\u1ea5t trong b\u00e0i vi\u1ebft n\u00e0y. M\u1ed9t cu\u1ed9n d\u00e2y \u201c24 VDC\u201d \u0111\u01b0\u1ee3c \u0111\u1ea3m b\u1ea3o s\u1ebd k\u00edch ho\u1ea1t t\u1eeb kho\u1ea3ng 18\u201319 V tr\u1edf l\u00ean (c\u00e1c b\u1ea3ng d\u1eef li\u1ec7u k\u1ef9 thu\u1eadt c\u00f3 th\u1ec3 dao \u0111\u1ed9ng t\u1eeb 70 % \u0111\u1ebfn 80 %), v\u1edbi m\u1ee9c gi\u1edbi h\u1ea1n th\u1ef1c t\u1ebf g\u1ea7n 26 V tr\u01b0\u1edbc khi \u0111i\u1ec7n \u00e1p qu\u00e1 cao k\u00e9o d\u00e0i l\u00e0m h\u1ecfng cu\u1ed9n d\u00e2y. D\u01b0\u1edbi m\u1ee9c kho\u1ea3ng 18 V, m\u1ecdi d\u1ef1 \u0111o\u00e1n \u0111\u1ec1u kh\u00f4ng c\u00f2n ch\u00ednh x\u00e1c. (C\u00e1c cu\u1ed9n d\u00e2y AC th\u01b0\u1eddng c\u00f3 m\u1ee9c \u0111i\u1ec7n \u00e1p gi\u1ea3i ph\u00f3ng b\u1eaft bu\u1ed9c cao h\u01a1n; m\u1ee9c \u0111\u1ecbnh m\u1ee9c 20 % l\u00e0 ph\u1ed5 bi\u1ebfn.)<\/p>\n <p>C\u00f3 hai k\u1ef9 thu\u1eadt th\u1ef1c \u0111\u1ecba \u0111\u00e1ng \u0111\u1ec3 \u00e1p d\u1ee5ng. Th\u1ee9 nh\u1ea5t, <strong>xem s\u1ed1 hi\u1ec7u m\u1eabu<\/strong>. C\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t th\u01b0\u1eddng m\u00e3 h\u00f3a \u0111i\u1ec7n \u00e1p cu\u1ed9n d\u00e2y v\u00e0o m\u00e3 s\u1ea3n ph\u1ea9m, th\u01b0\u1eddng d\u01b0\u1edbi d\u1ea1ng h\u1eadu t\u1ed1 c\u1ee7a m\u1eabu c\u01a1 b\u1ea3n; do \u0111\u00f3, khi \u0111\u1eb7t h\u00e0ng linh ki\u1ec7n thay th\u1ebf, h\u00e3y \u0111\u1ea3m b\u1ea3o ch\u1ecdn \u0111\u00fang h\u1eadu t\u1ed1 \u0111\u00f3, ch\u1ee9 kh\u00f4ng ch\u1ec9 d\u1ef1a v\u00e0o m\u1eabu c\u01a1 b\u1ea3n. Th\u1ee9 hai, <strong>ph\u00e2n t\u00edch ng\u01b0\u1ee3c d\u1ef1a tr\u00ean \u0111i\u1ec7n tr\u1edf cu\u1ed9n d\u00e2y<\/strong> v\u1edbi <code>V = \u221a(P \u00d7 R)<\/code>, trong \u0111\u00f3 c\u00e1c cu\u1ed9n d\u00e2y \u0111a n\u0103ng c\u1ee1 nh\u1ecf \u0111\u1ebfn trung b\u00ecnh th\u01b0\u1eddng ti\u00eau th\u1ee5 0,45\u20130,9 W (c\u00e1c r\u01a1le c\u00f4ng su\u1ea5t c\u00f3 th\u1ec3 l\u00ean \u0111\u1ebfn kho\u1ea3ng 1,9 W). \u0110o gi\u00e1 tr\u1ecb R, gi\u1ea3i ph\u01b0\u01a1ng tr\u00ecnh, l\u00e0m tr\u00f2n \u0111\u1ebfn \u0111i\u1ec7n \u00e1p cu\u1ed9n d\u00e2y ti\u00eau chu\u1ea9n g\u1ea7n nh\u1ea5t, v\u00e0 danh s\u00e1ch c\u00e1c l\u1ef1a ch\u1ecdn s\u1ebd thu h\u1eb9p l\u1ea1i c\u00f2n m\u1ed9t ho\u1eb7c hai \u1ee9ng vi\u00ean; sau \u0111\u00f3 x\u00e1c nh\u1eadn v\u1edbi nh\u00e0 s\u1ea3n xu\u1ea5t.<\/p>\n\n <h2>L\u1ed7i \u0111i\u1ec7n \u00e1p cu\u1ed9n d\u00e2y r\u01a1le: C\u00e1c b\u01b0\u1edbc ki\u1ec3m tra tr\u00ean b\u00e0n th\u1eed \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh nguy\u00ean nh\u00e2n<\/h2>\n <p>Khi m\u1ed9t r\u01a1le \u201cng\u1eebng ho\u1ea1t \u0111\u1ed9ng\u201d, cu\u1ed9n d\u00e2y th\u01b0\u1eddng l\u00e0 nghi ph\u1ea1m \u0111\u1ea7u ti\u00ean, nh\u01b0ng th\u01b0\u1eddng l\u1ea1i v\u00f4 can. Ch\u1ec9 c\u1ea7n hai ph\u00fat ki\u1ec3m tra tr\u00ean b\u00e0n th\u1eed l\u00e0 c\u00f3 th\u1ec3 ph\u00e2n bi\u1ec7t \u0111\u01b0\u1ee3c gi\u1eefa m\u1ed9t cu\u1ed9n d\u00e2y h\u1ecfng v\u00e0 tr\u01b0\u1eddng h\u1ee3p \u0111i\u1ec7n \u00e1p kh\u00f4ng \u0111\u00fang:<\/p>\n\n <!-- RICH: ComparisonTable (\u75c7\u72b6) -->\n <div class=\"table-wrapper\">\n <table class=\"rich-table\">\n <caption class=\"rich-table-cap\">C\u00e1c tri\u1ec7u ch\u1ee9ng li\u00ean quan \u0111\u1ebfn \u0111i\u1ec7n \u00e1p cu\u1ed9n d\u00e2y v\u00e0 \u00fd ngh\u0129a c\u1ee7a ch\u00fang<\/caption>\n <thead>\n <tr><th scope=\"col\">Tri\u1ec7u ch\u1ee9ng<\/th><th scope=\"col\">Nguy\u00ean nh\u00e2n c\u00f3 th\u1ec3<\/th><th scope=\"col\">Ki\u1ec3m tra<\/th><\/tr>\n <\/thead>\n <tbody>\n <tr><td>C\u00f3 \u0111i\u1ec7n \u00e1p, cao h\u01a1n m\u1ee9c b\u1eaft bu\u1ed9c ph\u1ea3i ho\u1ea1t \u0111\u1ed9ng, kh\u00f4ng c\u00f3 hi\u1ec7n t\u01b0\u1ee3ng h\u00fat v\u00e0o<\/td><td>M\u1ea1ch h\u1edf cu\u1ed9n d\u00e2y, ho\u1eb7c b\u1ed9 \u0111i\u1ec1u khi\u1ec3n kh\u00f4ng h\u00fat d\u00f2ng \u0111i\u1ec7n<\/td><td>\u0110o \u0111i\u1ec7n tr\u1edf cu\u1ed9n d\u00e2y; gi\u00e1 tr\u1ecb v\u00f4 h\u1ea1n c\u00f3 ngh\u0129a l\u00e0 m\u1ea1ch h\u1edf. So s\u00e1nh v\u1edbi m\u1ed9t cu\u1ed9n d\u00e2y \u0111\u00e3 bi\u1ebft l\u00e0 ho\u1ea1t \u0111\u1ed9ng t\u1ed1t<\/td><\/tr>\n <tr><td>Ti\u1ebfng l\u00e1ch c\u00e1ch hay ti\u1ebfng vo vo<\/td><td>Ngu\u1ed3n c\u1ea5p n\u1eb1m trong ho\u1eb7c d\u01b0\u1edbi v\u00f9ng ph\u1ea3i ho\u1ea1t \u0111\u1ed9ng; d\u00f2ng xoay chi\u1ec1u (AC) \u0111\u01b0\u1ee3c c\u1ea5p v\u00e0o cu\u1ed9n d\u00e2y m\u1ed9t chi\u1ec1u (DC)<\/td><td>\u0110o \u0111i\u1ec7n \u00e1p t\u1ea1i c\u00e1c c\u1ef1c c\u1ee7a cu\u1ed9n d\u00e2y trong \u0111i\u1ec1u ki\u1ec7n c\u00f3 t\u1ea3i, kh\u00f4ng ph\u1ea3i t\u1ea1i ngu\u1ed3n c\u1ea5p \u0111i\u1ec7n<\/td><\/tr>\n <tr><td>Lu\u00f4n n\u00f3ng li\u00ean t\u1ee5c<\/td><td>Qu\u00e1 \u00e1p, duy tr\u00ec \u1edf m\u1ee9c g\u1ea7n ho\u1eb7c cao h\u01a1n \u0111i\u1ec7n \u00e1p t\u1ed1i \u0111a cho ph\u00e9p<\/td><td>So s\u00e1nh \u0111i\u1ec7n \u00e1p \u0111o \u0111\u01b0\u1ee3c v\u1edbi gi\u00e1 tr\u1ecb t\u1ed1i \u0111a trong b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt, \u0111i\u1ec1u ch\u1ec9nh gi\u1ea3m c\u00f4ng su\u1ea5t theo nhi\u1ec7t \u0111\u1ed9 trong t\u1ee7<\/td><\/tr>\n <tr><td>Ch\u1ebft sau khi \u0111i\u1ec7n \u00e1p thay \u0111\u1ed5i<\/td><td>Trong qu\u00e1 tr\u00ecnh thay th\u1ebf, \u0111\u00e3 s\u1eed d\u1ee5ng lo\u1ea1i ngu\u1ed3n ho\u1eb7c \u0111i\u1ec7n \u00e1p kh\u00f4ng ph\u00f9 h\u1ee3p<\/td><td>H\u00e3y ki\u1ec3m tra l\u1ea1i ngu\u1ed3n c\u1ea5p th\u1ef1c t\u1ebf cho cu\u1ed9n d\u00e2y, bao g\u1ed3m c\u1ea3 \u0111\u1ea7u ra c\u1ee7a b\u1ed9 \u0111i\u1ec1u khi\u1ec3n<\/td><\/tr>\n <tr><td>Cu\u1ed9n d\u00e2y \u0111i\u1ec1u h\u00f2a ph\u00e1t ra ti\u1ebfng \u00f9 l\u1edbn<\/td><td>\u0110i\u1ec7n \u00e1p th\u1ea5p ho\u1eb7c v\u00f2ng che n\u1eafng b\u1ecb h\u1ecfng<\/td><td>\u0110o \u0111i\u1ec7n \u00e1p xoay chi\u1ec1u t\u1ea1i cu\u1ed9n d\u00e2y; 80 % so v\u1edbi gi\u00e1 tr\u1ecb \u0111\u1ecbnh m\u1ee9c l\u00e0 m\u1ee9c \u0111i\u1ec7n \u00e1p xoay chi\u1ec1u th\u1ef1c t\u1ebf th\u1ea5p nh\u1ea5t<\/td><\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n\n <p>C\u00e2u chuy\u1ec7n kinh \u0111i\u1ec3n n\u00e0y x\u1ee9ng \u0111\u00e1ng c\u00f3 m\u1ed9t l\u1eddi c\u1ea3nh b\u00e1o ri\u00eang: <strong>c\u1ea5p ngu\u1ed3n xoay chi\u1ec1u v\u00e0o cu\u1ed9n d\u00e2y m\u1ed9t chi\u1ec1u<\/strong>. D\u00f2ng \u0111i\u1ec7n trong cu\u1ed9n d\u00e2y m\u1ed9t chi\u1ec1u (DC) ch\u1ec9 b\u1ecb gi\u1edbi h\u1ea1n b\u1edfi \u0111i\u1ec7n tr\u1edf; trong tr\u01b0\u1eddng h\u1ee3p d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u (AC) 50\/60 Hz, t\u1eeb th\u00f4ng gi\u1ea3m xu\u1ed1ng 0 hai l\u1ea7n m\u1ed7i chu k\u1ef3, do \u0111\u00f3 ph\u1ea7n r\u00f4-to s\u1ebd rung l\u1eafc khi d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u \u0111\u1ea9y cu\u1ed9n d\u00e2y v\u01b0\u1ee3t qu\u00e1 gi\u1edbi h\u1ea1n nhi\u1ec7t thi\u1ebft k\u1ebf. K\u1ebft qu\u1ea3 th\u01b0\u1eddng th\u1ea5y l\u00e0 v\u00e0i gi\u00e2y ti\u1ebfng k\u00eau r\u00e8 r\u00e8, sau \u0111\u00f3 cu\u1ed9n d\u00e2y b\u1ecb h\u1ecfng. Tr\u01b0\u1eddng h\u1ee3p ng\u01b0\u1ee3c l\u1ea1i l\u1ea1i t\u1ed3i t\u1ec7 theo m\u1ed9t c\u00e1ch kh\u00e1c: khi c\u1ea5p \u0111i\u1ec7n m\u1ed9t chi\u1ec1u (DC) v\u00e0o cu\u1ed9n d\u00e2y xoay chi\u1ec1u (AC), \u0111i\u1ec7n c\u1ea3m v\u1ed1n gi\u1edbi h\u1ea1n d\u00f2ng \u0111i\u1ec7n s\u1ebd bi\u1ebfn m\u1ea5t, v\u00e0 d\u00f2ng \u0111i\u1ec7n s\u1ebd t\u0103ng v\u1ecdt cho \u0111\u1ebfn khi cu\u1ed9n d\u00e2y b\u1ecb ch\u00e1y. \u201c24 VAC\u201d v\u00e0 \u201c24 VDC\u201d kh\u00f4ng th\u1ec3 thay th\u1ebf cho nhau, d\u00f9 c\u00e1c con s\u1ed1 tr\u00f4ng gi\u1ed1ng nhau.<\/p>\n <p>C\u00f3 m\u1ed9t \u0111i\u1ec3m c\u1ea7n l\u01b0u \u00fd \u0111\u1ec3 tr\u00e1nh ch\u1ea9n \u0111o\u00e1n sai: vi\u1ec7c c\u00e1c ti\u1ebfp \u0111i\u1ec3m kh\u00f4ng d\u1eabn \u0111i\u1ec7n kh\u00f4ng nh\u1ea5t thi\u1ebft l\u00e0 do cu\u1ed9n d\u00e2y c\u00f3 v\u1ea5n \u0111\u1ec1. N\u1ebfu b\u1ea1n nghe th\u1ea5y r\u00f4to h\u00fat v\u00e0o, ch\u1ee9ng t\u1ecf cu\u1ed9n d\u00e2y v\u1eabn ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng. H\u00e3y ki\u1ec3m tra cu\u1ed9n d\u00e2y tr\u01b0\u1edbc, sau \u0111\u00f3 m\u1edbi \u0111\u1ebfn c\u00e1c ti\u1ebfp \u0111i\u1ec3m.<\/p>\n\n <h2>N\u00ean s\u1eed d\u1ee5ng \u0111i\u1ec7n \u00e1p cu\u1ed9n d\u00e2y n\u00e0o: H\u00e3y b\u1eaft \u0111\u1ea7u t\u1eeb ngu\u1ed3n c\u1ea5p \u0111i\u1ec7n cho cu\u1ed9n d\u00e2y<\/h2>\n <p>C\u00e2u h\u1ecfi v\u1ec1 cu\u1ed9n d\u00e2y kh\u00f4ng bao gi\u1edd l\u00e0 \u201c\u0111i\u1ec7n \u00e1p n\u00e0o l\u00e0 t\u1ed1t nh\u1ea5t?\u201d, m\u00e0 l\u00e0 \u201cai c\u1ea5p ngu\u1ed3n cho cu\u1ed9n d\u00e2y n\u00e0y?\u201d. \u0110i\u1ec7n \u00e1p c\u1ee7a cu\u1ed9n d\u00e2y ph\u1ea3i b\u1eb1ng v\u1edbi ngu\u1ed3n \u0111i\u1ec7n \u0111i\u1ec1u khi\u1ec3n m\u00e0 b\u1ea1n th\u1ef1c s\u1ef1 c\u00f3, v\u00ec v\u1eady h\u00e3y \u0111o ngu\u1ed3n \u0111i\u1ec7n tr\u01b0\u1edbc, sau \u0111\u00f3 m\u1edbi ch\u1ecdn cu\u1ed9n d\u00e2y, tuy\u1ec7t \u0111\u1ed1i kh\u00f4ng l\u00e0m ng\u01b0\u1ee3c l\u1ea1i.<\/p>\n\n <h3>Cu\u1ed9n d\u00e2y ch\u1ec9 quan t\u00e2m \u0111\u1ebfn m\u1ed9t c\u00e2u h\u1ecfi duy nh\u1ea5t: Ai l\u00e0 ng\u01b0\u1eddi cung c\u1ea5p n\u0103ng l\u01b0\u1ee3ng cho n\u00f3?<\/h3>\n <!-- BP-1: \u00a74 \u4f9b\u7535\u4e16\u754c\u5bf9\u7167\u5361 (Replaces H3-1 \u56db\u60c5\u5f62\u53e5) -->\n <div class=\"bd-supply-map bd-reveal\">\n <div class=\"bd-supply-row\">\n <span class=\"bd-supply-ic\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"24\" height=\"24\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" aria-hidden=\"true\"><rect x=\"4\" y=\"4\" width=\"16\" height=\"16\" rx=\"2\"\/><rect x=\"9\" y=\"9\" width=\"6\" height=\"6\"\/><path d=\"M9 2v2\"\/><path d=\"M15 2v2\"\/><path d=\"M9 20v2\"\/><path d=\"M15 20v2\"\/><path d=\"M2 9h2\"\/><path d=\"M2 15h2\"\/><path d=\"M20 9h2\"\/><path d=\"M20 15h2\"\/><\/svg><\/span>\n <div class=\"bd-supply-mid\"><p class=\"bd-supply-who-name\">Cu\u1ed9n d\u00e2y 24 VDC<\/p><p class=\"bd-supply-who-desc\">\u0111\u01b0\u1ee3c c\u1ea5p ngu\u1ed3n t\u1eeb \u0111\u1ea7u ra c\u1ee7a b\u1ed9 \u0111i\u1ec1u khi\u1ec3n (PLC, b\u1ed9 h\u1eb9n gi\u1edd, b\u1ed9 \u0111i\u1ec1u khi\u1ec3n nhi\u1ec7t \u0111\u1ed9)<\/p><\/div>\n <p class=\"bd-supply-chg\">D\u00f2ng \u0111i\u1ec7n b\u1ecb gi\u1edbi h\u1ea1n b\u1edfi \u0111i\u1ec7n tr\u1edf v\u1edbi m\u1ee9c ti\u00eau th\u1ee5 kh\u00f4ng \u0111\u1ed5i; c\u1ea7n ph\u1ea3i n\u1ed1i m\u1ed9t \u0111i-\u1ed1t flyback v\u00e0o m\u1ea1ch n\u00e0y ho\u1eb7c v\u00e0o b\u1ed9 \u0111i\u1ec1u khi\u1ec3n.<\/p>\n <\/div>\n <div class=\"bd-supply-row\">\n <span class=\"bd-supply-ic\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"24\" height=\"24\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" aria-hidden=\"true\"><polygon points=\"13 2 3 14 12 14 11 22 21 10 12 10 13 2\"\/><\/svg><\/span>\n <div class=\"bd-supply-mid\"><p class=\"bd-supply-who-name\">Cu\u1ed9n d\u00e2y \u0111i\u1ec1u h\u00f2a \u1edf \u0111i\u1ec7n \u00e1p \u0111\u01b0\u1eddng d\u00e2y<\/p><p class=\"bd-supply-who-desc\">\u0111\u01b0\u1ee3c c\u1ea5p ngu\u1ed3n tr\u1ef1c ti\u1ebfp t\u1eeb l\u01b0\u1edbi \u0111i\u1ec7n, 110\/120 ho\u1eb7c 220\u2013240 VAC t\u00f9y theo khu v\u1ef1c<\/p><\/div>\n <p class=\"bd-supply-chg\">\u0110\u1ed9 t\u1ef1 c\u1ea3m gi\u1edbi h\u1ea1n c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n; v\u00f2ng che ch\u1eafn gi\u00fap lo\u1ea1i b\u1ecf ti\u1ebfng \u00f9; d\u00f2ng \u0111i\u1ec7n kh\u1edfi \u0111\u1ed9ng l\u1edbn g\u1ea5p nhi\u1ec1u l\u1ea7n d\u00f2ng \u0111i\u1ec7n duy tr\u00ec.<\/p>\n <\/div>\n <div class=\"bd-supply-row\">\n <span class=\"bd-supply-ic\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"24\" height=\"24\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" aria-hidden=\"true\"><polygon points=\"12 2 2 7 12 12 22 7 12 2\"\/><polyline points=\"2 17 12 22 22 17\"\/><polyline points=\"2 12 12 17 22 12\"\/><\/svg><\/span>\n <div class=\"bd-supply-mid\"><p class=\"bd-supply-who-name\">Cu\u1ed9n d\u00e2y \u0111a n\u0103ng 24\u2013240 V AC\/DC<\/p><p class=\"bd-supply-who-desc\">ch\u1ea5p nh\u1eadn ngu\u1ed3n AC ho\u1eb7c DC trong d\u1ea3i \u0111i\u1ec7n \u00e1p r\u1ed9ng th\u00f4ng qua b\u1ed9 ch\u1ec9nh l\u01b0u t\u00edch h\u1ee3p<\/p><\/div>\n <p class=\"bd-supply-chg\">M\u1ed9t m\u00e3 s\u1ea3n ph\u1ea9m (SKU) c\u00f3 th\u1ec3 \u0111\u00e1p \u1ee9ng c\u00e1c \u1ee9ng d\u1ee5ng \u1edf \u0111i\u1ec7n \u00e1p l\u01b0\u1edbi, nh\u01b0ng gi\u00e1 th\u00e0nh cao h\u01a1n, t\u1ecfa nhi\u1ec7t nhi\u1ec1u h\u01a1n v\u00e0 kh\u00f4ng h\u1ed7 tr\u1ee3 \u0111i\u1ec7n \u00e1p n\u00e0o d\u01b0\u1edbi 24 V.<\/p>\n <\/div>\n <div class=\"bd-supply-row\">\n <span class=\"bd-supply-ic\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"24\" height=\"24\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" aria-hidden=\"true\"><rect x=\"5\" y=\"5\" width=\"14\" height=\"14\" rx=\"2\"\/><path d=\"M9 2v3\"\/><path d=\"M15 2v3\"\/><path d=\"M9 19v3\"\/><path d=\"M15 19v3\"\/><path d=\"M2 9h3\"\/><path d=\"M2 15h3\"\/><path d=\"M19 9h3\"\/><path d=\"M19 15h3\"\/><\/svg><\/span>\n <div class=\"bd-supply-mid\"><p class=\"bd-supply-who-name\">\u0110\u1ea7u v\u00e0o SSR<\/p><p class=\"bd-supply-who-desc\">\u0111\u01b0\u1ee3c c\u1ea5p t\u00edn hi\u1ec7u \u0111i\u1ec1u khi\u1ec3n; ho\u00e0n to\u00e0n kh\u00f4ng c\u00f3 cu\u1ed9n d\u00e2y<\/p><\/div>\n <p class=\"bd-supply-chg\">S\u1eed d\u1ee5ng \u0111\u1ea7u ra b\u00e1n d\u1eabn thay v\u00ec c\u00e1c \u0111i\u1ec3m ti\u1ebfp x\u00fac; gi\u1edbi h\u1ea1n \u0111\u1ea7u v\u00e0o ch\u1eb7t ch\u1ebd h\u01a1n so v\u1edbi cu\u1ed9n d\u00e2y.<\/p>\n <\/div>\n <\/div>\n\n <h3>24 VDC: ti\u00eau chu\u1ea9n cho b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n<\/h3>\n <p>C\u00e1c t\u1ee7 PLC hi\u1ec7n \u0111\u1ea1i v\u1eadn h\u00e0nh h\u1ea7u h\u1ebft c\u00e1c r\u01a1le \u1edf m\u1ee9c 24 VDC: \u0111\u00e2y l\u00e0 \u0111i\u1ec7n \u00e1p c\u1ef1c th\u1ea5p an to\u00e0n, kh\u00f4ng g\u00e2y nhi\u1ec5u cho c\u00e1c t\u00edn hi\u1ec7u t\u01b0\u01a1ng t\u1ef1 l\u00e2n c\u1eadn nh\u01b0 c\u00e1ch m\u00e0 h\u1ec7 th\u1ed1ng d\u00e2y \u0111i\u1ec7n xoay chi\u1ec1u (AC) \u1edf \u0111i\u1ec7n \u00e1p \u0111\u01b0\u1eddng d\u00e2y c\u00f3 th\u1ec3 l\u00e0m, v\u00e0 n\u00f3 t\u01b0\u01a1ng th\u00edch tr\u1ef1c ti\u1ebfp v\u1edbi \u0111\u1ea7u ra c\u1ee7a PLC v\u00e0 c\u1ea3m bi\u1ebfn. Cu\u1ed9n d\u00e2y DC c\u00f3 c\u1ea5u tr\u00fac \u0111i\u1ec7n \u0111\u01a1n gi\u1ea3n; d\u00f2ng \u0111i\u1ec7n \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh b\u1edfi \u0111i\u1ec7n tr\u1edf, ti\u00eau th\u1ee5 c\u00f4ng su\u1ea5t kh\u00f4ng \u0111\u1ed5i v\u00e0 c\u00f3 th\u1ec3 d\u1ef1 \u0111o\u00e1n \u0111\u01b0\u1ee3c. N\u00f3 c\u0169ng c\u1ea7n m\u1ed9t \u0111i\u1ed1t flyback n\u1ed1i ngang (ho\u1eb7c b\u1ed9 \u0111i\u1ec1u khi\u1ec3n) \u0111\u1ec3 h\u1ea5p th\u1ee5 \u0111\u1ed9t bi\u1ebfn c\u1ea3m \u1ee9ng 100\u2013200 V m\u00e0 n\u00f3 ph\u1ea3n h\u1ed3i l\u1ea1i khi t\u1eaft. \u0110\u1ed9t bi\u1ebfn n\u00e0y l\u00e0 b\u00ecnh th\u01b0\u1eddng; h\u01b0 h\u1ecfng ch\u1ec9 x\u1ea3y ra khi kh\u00f4ng c\u00f3 \u0111i\u1ed1t n\u00e0o b\u1eaft \u0111\u01b0\u1ee3c n\u00f3. C\u00e1c cu\u1ed9n d\u00e2y nh\u1ecf 5 V v\u00e0 12 V thu\u1ed9c c\u00f9ng m\u1ed9t lo\u1ea1i, \u0111\u01b0\u1ee3c c\u1ea5p ngu\u1ed3n t\u1eeb ngu\u1ed3n \u0111i\u1ec7n t\u00edch h\u1ee3p: c\u00f9ng nguy\u00ean l\u00fd v\u1eadt l\u00fd, c\u00f9ng quy t\u1eafc 75 %.<\/p>\n\n <h3>Cu\u1ed9n d\u00e2y \u0111i\u1ec7n \u00e1p m\u1ea1ng AC: Th\u1ebf gi\u1edbi c\u1ee7a c\u00f4ng t\u1eafc tr\u1ef1c ti\u1ebfp<\/h3>\n <p>Cu\u1ed9n d\u00e2y d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u (AC) \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf kh\u00e1c bi\u1ec7t v\u00ec d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u ho\u1ea1t \u0111\u1ed9ng kh\u00e1c bi\u1ec7t. Ch\u00ednh \u0111\u1ed9 t\u1ef1 c\u1ea3m, ch\u1ee9 kh\u00f4ng ph\u1ea3i \u0111i\u1ec7n tr\u1edf, m\u1edbi l\u00e0 y\u1ebfu t\u1ed1 gi\u1edbi h\u1ea1n d\u00f2ng \u0111i\u1ec7n; t\u1eeb th\u00f4ng \u0111i qua \u0111i\u1ec3m 0 100 ho\u1eb7c 120 l\u1ea7n m\u1ed7i gi\u00e2y, do \u0111\u00f3 cu\u1ed9n d\u00e2y AC d\u1eabn d\u00f2ng \u0111i\u1ec7n <em>v\u00f2ng t\u1ea1o b\u00f3ng<\/em> gi\u00fap duy tr\u00ec t\u1eeb th\u00f4ng d\u01b0 v\u00e0 ng\u0103n kh\u00f4ng cho r\u00f4to ph\u00e1t ra ti\u1ebfng \u00f9 \u1edf t\u1ea7n s\u1ed1 \u0111\u01b0\u1eddng d\u00e2y. D\u00f2ng \u0111i\u1ec7n kh\u1edfi \u0111\u1ed9ng l\u1edbn g\u1ea5p nhi\u1ec1u l\u1ea7n d\u00f2ng \u0111i\u1ec7n gi\u1eef, sau \u0111\u00f3 \u1ed5n \u0111\u1ecbnh l\u1ea1i khi r\u00f4to \u0111\u00f3ng l\u1ea1i. \u0110\u1ed5i l\u1ea1i, cu\u1ed9n d\u00e2y xoay chi\u1ec1u kh\u00f4ng c\u1ea7n ngu\u1ed3n \u0111i\u1ec7n m\u1ed9t chi\u1ec1u, kh\u00f4ng c\u1ea7n \u0111i\u1ed1t, c\u0169ng kh\u00f4ng c\u1ea7n b\u1ed9 \u0111i\u1ec1u khi\u1ec3n. \u0110i\u1ec7n \u00e1p m\u1ea1ng b\u1eadt\/t\u1eaft cu\u1ed9n d\u00e2y tr\u1ef1c ti\u1ebfp, \u0111\u00f3 l\u00e0 l\u00fd do t\u1ea1i sao c\u00e1c cu\u1ed9n d\u00e2y 110\/120 VAC (B\u1eafc M\u1ef9) v\u00e0 220\u2013240 VAC (Ch\u00e2u \u00c2u, Ch\u00e2u \u00c1, h\u1ea7u h\u1ebft c\u00e1c n\u01a1i tr\u00ean th\u1ebf gi\u1edbi) v\u1eabn chi\u1ebfm \u01b0u th\u1ebf trong c\u00e1c m\u00e1y m\u00f3c \u0111\u01a1n gi\u1ea3n, m\u00e1y b\u01a1m v\u00e0 thi\u1ebft b\u1ecb c\u0169.<\/p>\n <p>T\u00ecnh tr\u1ea1ng \u0111i\u1ec7n \u00e1p th\u1ea5p th\u01b0\u1eddng kh\u00f3 ph\u00e1t hi\u1ec7n h\u01a1n trong h\u1ec7 th\u1ed1ng \u0111i\u1ec7n xoay chi\u1ec1u: m\u1ed9t cu\u1ed9n d\u00e2y 220 VAC \u0111\u01b0\u1ee3c c\u1ea5p ngu\u1ed3n t\u1eeb m\u1ea1ch 208 V s\u1ebd ho\u1ea1t \u0111\u1ed9ng g\u1ea7n m\u1ee9c \u0111i\u1ec7n \u00e1p t\u1ed1i thi\u1ec3u 80 %, \u0111i\u1ec1u n\u00e0y d\u1eabn \u0111\u1ebfn kh\u1ea3 n\u0103ng k\u00edch ho\u1ea1t y\u1ebfu v\u00e0 sinh nhi\u1ec7t d\u01b0 th\u1eeba. N\u1ebfu \u0111i\u1ec7n \u00e1p t\u1ea1i hi\u1ec7n tr\u01b0\u1eddng c\u1ee7a b\u1ea1n kh\u00f4ng \u1ed5n \u0111\u1ecbnh, h\u00e3y \u0111o ki\u1ec3m tra tr\u01b0\u1edbc khi quy l\u1ed7i cho r\u01a1le.<\/p>\n\n <img decoding=\"async\" src=\"https:\/\/www.omch.com\/wp-content\/uploads\/2026\/09\/Relay-Coil.webp\" style=\"width: 512px; height: 384px; max-width: 100%; object-fit: cover; border-radius: 12px; margin: 30px auto; display: block; box-shadow: 10px 10px 60px 0px rgba(210, 221, 224, 0.35); transition: all 0.3s ease; cursor: pointer;\" onmouseover=\"this.style.transform='translateY(-5px) scale(1.03)'; this.style.boxShadow='15px 25px 80px 0px rgba(210, 221, 224, 0.45)'\" onmouseout=\"this.style.transform='translateY(0) scale(1)'; this.style.boxShadow='10px 10px 60px 0px rgba(210, 221, 224, 0.35)'\"> \n\n <h3>\u0110\u1ea7u v\u00e0o \u0111a n\u0103ng v\u00e0 \u0111\u1ea7u v\u00e0o b\u00e1n d\u1eabn: hai c\u1ef1c hi\u1ec7n \u0111\u1ea1i c\u1ee7a ph\u1ed5<\/h3>\n <p>Hai l\u1ef1a ch\u1ecdn \u0111ang d\u1ea7n xu\u1ea5t hi\u1ec7n \u1edf hai b\u00ean r\u00eca. <strong>Cu\u1ed9n d\u00e2y \u0111a n\u0103ng<\/strong>, th\u01b0\u1eddng \u0111\u01b0\u1ee3c ghi l\u00e0 \u201c24\u2013240 V AC\/DC\u201d, ch\u1ee9a m\u1ed9t b\u1ed9 ch\u1ec9nh l\u01b0u nh\u1ecf b\u00ean trong v\u00e0 c\u00f3 th\u1ec3 ch\u1ea5p nh\u1eadn h\u1ea7u h\u1ebft m\u1ecdi \u0111i\u1ec7n \u00e1p \u0111i\u1ec1u khi\u1ec3n trong d\u1ea3i r\u1ed9ng, d\u00f9 l\u00e0 AC hay DC. Ch\u1ec9 c\u1ea7n m\u1ed9t m\u00e3 s\u1ea3n ph\u1ea9m duy nh\u1ea5t l\u00e0 \u0111\u1ee7 cho to\u00e0n b\u1ed9 d\u1ea3i \u0111i\u1ec7n \u00e1p l\u01b0\u1edbi, \u0111\u00f3 l\u00e0 l\u00fd do t\u1ea1i sao c\u00e1c nh\u00e0 ph\u00e2n ph\u1ed1i \u0111ang ng\u00e0y c\u00e0ng \u01b0a chu\u1ed9ng ch\u00fang v\u00e0 c\u00e1c k\u1ef9 thu\u1eadt vi\u00ean b\u1eaft \u0111\u1ea7u th\u1eafc m\u1eafc v\u1ec1 c\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a ch\u00fang. Nh\u1eefng nh\u01b0\u1ee3c \u0111i\u1ec3m: ch\u00fang c\u00f3 gi\u00e1 cao h\u01a1n, t\u1ef1 sinh nhi\u1ec7t nhi\u1ec1u h\u01a1n (c\u00e1c linh ki\u1ec7n \u0111i\u1ec7n t\u1eed b\u00ean trong lu\u00f4n \u0111\u01b0\u1ee3c c\u1ea5p ngu\u1ed3n) v\u00e0 kh\u00f4ng h\u1ed7 tr\u1ee3 ph\u00eda DC \u0111i\u1ec7n \u00e1p th\u1ea5p d\u01b0\u1edbi kho\u1ea3ng 24 V. Ch\u00fang gi\u00fap gi\u1ea3m thi\u1ec3u s\u1ef1 bi\u1ebfn \u0111\u1ed9ng \u0111i\u1ec7n \u00e1p; nh\u01b0ng kh\u00f4ng lo\u1ea1i b\u1ecf ho\u00e0n to\u00e0n v\u1ea5n \u0111\u1ec1 n\u00e0y.<\/p>\n <p><strong>C\u00e1c \u0111\u1ea7u v\u00e0o SSR<\/strong> \u1ede ph\u00eda b\u00ean kia: kh\u00f4ng c\u00f3 cu\u1ed9n d\u00e2y, kh\u00f4ng c\u00f3 b\u1ed9 ph\u1eadn chuy\u1ec3n \u0111\u1ed9ng, ch\u1ec9 c\u00f3 m\u1ed9t m\u1ea1ch \u0111\u1ea7u v\u00e0o (th\u01b0\u1eddng l\u00e0 3\u201332 VDC ho\u1eb7c 24\u2013280 VAC) \u0111i\u1ec1u khi\u1ec3n \u0111\u1ea7u ra b\u00e1n d\u1eabn. \u0110\u00e2y th\u01b0\u1eddng l\u00e0 gi\u1ea3i ph\u00e1p t\u1ed1i \u01b0u h\u01a1n cho PLC khi \u0111i\u1ec1u khi\u1ec3n t\u1ea3i n\u1eb7ng, nh\u01b0ng c\u00e1c y\u00eau c\u1ea7u v\u1ec1 \u0111\u1ea7u v\u00e0o l\u1ea1i kh\u1eaft khe h\u01a1n, do \u0111\u00f3 quy tr\u00ecnh l\u1ef1a ch\u1ecdn c\u0169ng kh\u00e1c bi\u1ec7t.<\/p>\n <p><strong>Nhi\u1ec7t \u0111\u1ed9 trong t\u1ee7 l\u00e0 y\u1ebfu t\u1ed1 \u1ea9n.<\/strong> \u0110i\u1ec7n tr\u1edf c\u1ee7a \u0111\u1ed3ng t\u0103ng l\u00ean khi cu\u1ed9n d\u00e2y n\u00f3ng l\u00ean, d\u00f2ng \u0111i\u1ec7n gi\u1ea3m \u0111i \u1edf c\u00f9ng m\u1ee9c \u0111i\u1ec7n \u00e1p \u0111\u1ea7u v\u00e0o, v\u00e0 bi\u00ean \u0111\u1ed9 an to\u00e0n so v\u1edbi ng\u01b0\u1ee1ng k\u00edch ho\u1ea1t t\u1ed1i thi\u1ec3u s\u1ebd thu h\u1eb9p l\u1ea1i. M\u1ed9t r\u01a1le c\u00f3 th\u1ec3 k\u00edch ho\u1ea1t \u1edf 20 \u00b0C c\u00f3 th\u1ec3 \u1edf tr\u1ea1ng th\u00e1i k\u00edch ho\u1ea1t v\u00e0 ph\u00e1t ra ti\u1ebfng k\u00eau \u00f9 \u00f9 \u1edf 60 \u00b0C khi \u0111\u1eb7t trong t\u1ee7 k\u00edn v\u1edbi ngu\u1ed3n \u0111i\u1ec7n kh\u00f4ng \u1ed5n \u0111\u1ecbnh. Gi\u1ea3i ph\u00e1p l\u00e0 \u0111\u1ea3m b\u1ea3o ngu\u1ed3n \u0111i\u1ec7n \u1ed5n \u0111\u1ecbnh v\u00e0 th\u00f4ng gi\u00f3 cho t\u1ee7, ch\u1ee9 kh\u00f4ng ph\u1ea3i l\u00e0 s\u1eed d\u1ee5ng m\u1ed9t r\u01a1le \u201cm\u1ea1nh h\u01a1n\u201d.<\/p>\n\n <h2>\u0110i\u1ec7n \u00e1p cu\u1ed9n d\u00e2y theo \u1ee9ng d\u1ee5ng: Ma tr\u1eadn l\u0129nh v\u1ef1c<\/h2>\n <p>Ma tr\u1eadn d\u01b0\u1edbi \u0111\u00e2y l\u00e0 k\u1ebft qu\u1ea3 \u1ee9ng d\u1ee5ng th\u1ef1c ti\u1ec5n c\u1ee7a t\u1ea5t c\u1ea3 nh\u1eefng n\u1ed9i dung tr\u00ean: m\u1ed9t danh s\u00e1ch ki\u1ec3m tra cho t\u1eebng t\u00ecnh hu\u1ed1ng m\u00e0 b\u1ea1n c\u00f3 th\u1ec3 tham kh\u1ea3o song song v\u1edbi m\u1ed9t \u0111\u01a1n h\u00e0ng th\u1ef1c t\u1ebf.<\/p>\n\n <!-- RICH: ComparisonTable (\u573a\u666f\u77e9\u9635) -->\n <div class=\"table-wrapper\">\n <table class=\"rich-table\">\n <caption class=\"rich-table-cap\">\u0110i\u1ec7n \u00e1p cu\u1ed9n d\u00e2y theo \u1ee9ng d\u1ee5ng<\/caption>\n <thead>\n <tr><th scope=\"col\">\u1ee8ng d\u1ee5ng<\/th><th scope=\"col\">L\u1ef1a ch\u1ecdn ph\u00eda cu\u1ed9n d\u00e2y<\/th><th scope=\"col\">C\u00e1c th\u00f4ng s\u1ed1 c\u1ea7n ki\u1ec3m tra<\/th><th scope=\"col\">\u0110i\u1ec3m y\u1ebfu c\u1ee7a n\u00f3 l\u00e0 g\u00ec<\/th><\/tr>\n <\/thead>\n <tbody>\n <tr><td>T\u1ee7 PLC ho\u1eb7c t\u1ee7 \u0111i\u1ec1u khi\u1ec3n<\/td><td>Cu\u1ed9n d\u00e2y 24 VDC ph\u00f9 h\u1ee3p v\u1edbi \u0111\u1ea7u ra c\u1ee7a b\u1ed9 \u0111i\u1ec1u khi\u1ec3n<\/td><td>Ph\u1ea3i ho\u1ea1t \u0111\u1ed9ng \u1edf m\u1ee9c \u2264 75 %; \u0111o ngu\u1ed3n \u0111i\u1ec7n t\u1ea1i cu\u1ed9n d\u00e2y khi c\u00f3 t\u1ea3i; \u0111\u00e3 l\u1eafp \u0111\u1eb7t \u0111i-\u1ed1t flyback<\/td><td>\u0110i\u1ec7n \u00e1p \u0111\u01b0\u1eddng 24 V gi\u1ea3m xu\u1ed1ng d\u01b0\u1edbi ~18\u201319 V; vi\u1ec7c kh\u00f4ng c\u00f3 \u0111i-\u1ed1t flyback s\u1ebd l\u00e0m h\u1ecfng b\u1ed9 \u0111i\u1ec1u khi\u1ec3n<\/td><\/tr>\n <tr><td>Chuy\u1ec3n m\u1ea1ch tr\u1ef1c ti\u1ebfp \u0111i\u1ec7n \u00e1p \u0111\u01b0\u1eddng d\u00e2y<\/td><td>Cu\u1ed9n d\u00e2y \u0111i\u1ec1u h\u00f2a ho\u1ea1t \u0111\u1ed9ng \u1edf \u0111i\u1ec7n \u00e1p \u0111\u01b0\u1eddng d\u00e2y \u0111\u1ecba ph\u01b0\u01a1ng (110\u2013120 ho\u1eb7c 220\u2013240 VAC)<\/td><td>\u0110i\u1ec7n \u00e1p \u0111\u01b0\u1eddng d\u00e2y \u0111\u01b0\u1ee3c \u0111o t\u1ea1i hi\u1ec7n tr\u01b0\u1eddng; c\u01a1 ch\u1ebf ng\u1eaft t\u1ef1 \u0111\u1ed9ng khi c\u00f3 d\u00f2ng xoay chi\u1ec1u (th\u01b0\u1eddng l\u00e0 20 %); kh\u00f4ng c\u00f3 ti\u1ebfng \u00f9 t\u1eeb v\u00f2ng che<\/td><td>\u0110i\u1ec7n \u00e1p m\u1ec1m t\u1ea1i v\u1ecb tr\u00ed g\u1ea7n 80 % so v\u1edbi gi\u00e1 tr\u1ecb \u0111\u1ecbnh m\u1ee9c; khi \u00e1p d\u1ee5ng d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u (DC) v\u00e0o cu\u1ed9n d\u00e2y xoay chi\u1ec1u (AC) s\u1ebd g\u00e2y ra qu\u00e1 d\u00f2ng<\/td><\/tr>\n <tr><td>Thay th\u1ebf m\u00e1y m\u00f3c c\u0169<\/td><td>Thay th\u1ebf b\u1eb1ng cu\u1ed9n d\u00e2y c\u00f3 \u0111i\u1ec7n \u00e1p T\u01af\u01a0NG T\u1ef0 nh\u01b0 cu\u1ed9n d\u00e2y ban \u0111\u1ea7u<\/td><td>Tr\u01b0\u1edbc khi mua, h\u00e3y \u0111\u1ecdc k\u1ef9 k\u00fd hi\u1ec7u tr\u00ean cu\u1ed9n d\u00e2y ho\u1eb7c h\u1eadu t\u1ed1 m\u00e3 hi\u1ec7u c\u1ee7a r\u01a1le c\u0169<\/td><td>\u201cT\u0103ng\u201d \u0111i\u1ec7n \u00e1p cu\u1ed9n d\u00e2y m\u00e0 kh\u00f4ng ki\u1ec3m tra m\u1ea1ch \u0111i\u1ec7n, v\u1ed1n v\u1eabn \u0111ang cung c\u1ea5p \u0111i\u1ec7n \u00e1p c\u0169<\/td><\/tr>\n <tr><td>Thi\u1ebft b\u1ecb xu\u1ea5t kh\u1ea9u \/ \u0111a khu v\u1ef1c<\/td><td>\u0110i\u1ec7n \u00e1p cu\u1ed9n d\u00e2y theo t\u1eebng khu v\u1ef1c \u0111\u00edch (110\u2013120 VAC t\u1ea1i B\u1eafc M\u1ef9, 220\u2013240 VAC t\u1ea1i c\u00e1c khu v\u1ef1c kh\u00e1c, 24 VDC trong c\u00e1c b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n)<\/td><td>X\u00e1c nh\u1eadn khu v\u1ef1c \u0111\u00edch; phi\u00ean b\u1ea3n \u0111a n\u0103ng 24\u2013240 V AC\/DC ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c \u0111\u1ed9i xe \u0111a d\u1ea1ng<\/td><td>L\u01b0u kho m\u1ed9t lo\u1ea1i s\u1ea3n ph\u1ea9m c\u00f3 \u0111i\u1ec7n \u00e1p \u0111\u01b0\u1eddng d\u00e2y v\u00e0 giao h\u00e0ng \u0111\u1ebfn khu v\u1ef1c sai<\/td><\/tr>\n <tr><td>M\u1ed9t c\u1ea7u th\u1ee7 d\u1ef1 b\u1ecb ch\u01b0a r\u00f5 danh t\u00ednh<\/td><td>Ph\u00e2n t\u00edch ng\u01b0\u1ee3c tr\u01b0\u1edbc khi c\u1ea5p ngu\u1ed3n (ph\u01b0\u01a1ng ph\u00e1p \u0111i\u1ec7n tr\u1edf)<\/td><td>\u0110i\u1ec7n tr\u1edf cu\u1ed9n d\u00e2y; c\u00f4ng su\u1ea5t gi\u1ea3 \u0111\u1ecbnh 0,45\u20130,9 W; l\u00e0m tr\u00f2n \u0111\u1ebfn \u0111i\u1ec7n \u00e1p chu\u1ea9n<\/td><td>X\u00e1c \u0111\u1ecbnh \u0111i\u1ec7n \u00e1p \u0111\u1ecbnh m\u1ee9c: \u0111o, sau \u0111\u00f3 so s\u00e1nh<\/td><\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n\n <p>Ba tr\u01b0\u1eddng th\u00f4ng tin c\u1ea7n x\u00e1c nh\u1eadn tr\u01b0\u1edbc m\u1ed7i \u0111\u01a1n h\u00e0ng: <strong>\u0111i\u1ec7n \u00e1p cu\u1ed9n d\u00e2y v\u00e0 lo\u1ea1i ngu\u1ed3n c\u1ea5p, ri\u00eang bi\u1ec7t<\/strong>, b\u1edfi v\u00ec th\u00f4ng tin v\u1ec1 \u201c24 V\u201d ch\u01b0a \u0111\u1ea7y \u0111\u1ee7 v\u00e0 c\u00e1c cu\u1ed9n d\u00e2y 24 VAC v\u00e0 24 VDC g\u1eb7p s\u1ef1 c\u1ed1 theo nh\u1eefng c\u00e1ch kh\u00e1c nhau; <strong>\u0111\u1ecbnh m\u1ee9c ti\u1ebfp \u0111i\u1ec3m, t\u00e1ch bi\u1ec7t v\u1edbi cu\u1ed9n d\u00e2y<\/strong>, b\u1edfi v\u00ec t\u1ea3i quy\u1ebft \u0111\u1ecbnh y\u1ebfu t\u1ed1 n\u00e0y c\u00f2n ngu\u1ed3n \u0111i\u1ec7n quy\u1ebft \u0111\u1ecbnh y\u1ebfu t\u1ed1 kia; v\u00e0 <strong>d\u1ea3i nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng<\/strong>, b\u1edfi v\u00ec trong t\u1ee7 gia nhi\u1ec7t, ngu\u1ed3n c\u1ea5p \u0111i\u1ec7n v\u1eabn ph\u1ea3i \u0111\u1ea3m b\u1ea3o ho\u1ea1t \u0111\u1ed9ng b\u1eaft bu\u1ed9c ngay c\u1ea3 khi cu\u1ed9n d\u00e2y \u0111ang n\u00f3ng.<\/p>\n <p>H\u1ea7u h\u1ebft c\u00e1c sai s\u00f3t khi thay th\u1ebf \u0111\u1ec1u xu\u1ea5t ph\u00e1t t\u1eeb vi\u1ec7c \u0111\u1eb7t h\u00e0ng phi\u00ean b\u1ea3n c\u01a1 b\u1ea3n m\u00e0 kh\u00f4ng \u0111\u1ecdc k\u1ef9 th\u00f4ng tin v\u1ec1 phi\u00ean b\u1ea3n cu\u1ed9n d\u00e2y c\u1ee7a chi ti\u1ebft c\u1ea7n thay th\u1ebf. H\u00e3y \u0111\u1ecdc k\u1ef9 th\u00f4ng tin v\u1ec1 chi ti\u1ebft c\u0169 tr\u01b0\u1edbc ti\u00ean.<\/p>\n\n <!-- BP-2: \u00a75 \u94c1\u5f8b\u5f15\u53e5 (Replaces \u6bb5\u9996\u53e5) -->\n <div class=\"bd-field-rule\">\n <span class=\"bd-field-rule-label\">Quy t\u1eafc th\u1ef1c \u0111\u1ecba<\/span>\n <p class=\"bd-field-rule-quote\">\u0110i\u1ec7n \u00e1p c\u1ee7a cu\u1ed9n d\u00e2y thay th\u1ebf b\u1eb1ng v\u1edbi \u0111i\u1ec7n \u00e1p c\u1ee7a cu\u1ed9n d\u00e2y ban \u0111\u1ea7u.<\/p>\n <\/div>\n\n <h2>G\u00f3c nh\u00ecn kinh doanh: \u0110\u1ea3m b\u1ea3o ngu\u1ed3n cung c\u00e1c m\u1ee9c \u0111i\u1ec7n \u00e1p cu\u1ed9n d\u00e2y<\/h2>\n <p>M\u1ecdi th\u1ee9 n\u00eau tr\u00ean \u0111\u1ec1u c\u00f3 kh\u00eda c\u1ea1nh mua h\u00e0ng, v\u00e0 \u0111\u1ed1i v\u1edbi c\u00e1c nh\u00e0 ph\u00e2n ph\u1ed1i, \u0111\u00f3 ch\u00ednh l\u00e0 c\u1ed1t l\u00f5i c\u1ee7a v\u1ea5n \u0111\u1ec1: m\u1ed9t r\u01a1le kh\u00f4ng ch\u1ec9 l\u00e0 m\u1ed9t s\u1ea3n ph\u1ea9m \u0111\u01a1n l\u1ebb m\u00e0 l\u00e0 m\u1ed9t d\u00f2ng s\u1ea3n ph\u1ea9m g\u1ed3m c\u00e1c phi\u00ean b\u1ea3n c\u00f3 \u0111i\u1ec7n \u00e1p cu\u1ed9n d\u00e2y kh\u00e1c nhau d\u1ef1a tr\u00ean c\u00f9ng m\u1ed9t m\u1eabu c\u01a1 b\u1ea3n. Kh\u00e1ch h\u00e0ng khi g\u1ecdi \u0111i\u1ec7n h\u1ecfi v\u1ec1 r\u01a1le s\u1ebd n\u00eau r\u00f5 \u0111i\u1ec7n \u00e1p cu\u1ed9n d\u00e2y ngay trong c\u00e2u \u0111\u1ea7u ti\u00ean. \u0110\u00f3 ch\u00ednh l\u00e0 l\u00fac ph\u1ea1m vi s\u1ea3n ph\u1ea9m kh\u00f4ng c\u00f2n ch\u1ec9 l\u00e0 m\u1ed9t kh\u00e1i ni\u1ec7m tr\u00ean b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt n\u1eefa.<\/p>\n\n <h3>\u0110\u01a1n v\u1ecb t\u1ed1i thi\u1ec3u \u0111\u1ec3 b\u00e1o gi\u00e1 l\u00e0 \u201cm\u1eabu + \u0111i\u1ec7n \u00e1p cu\u1ed9n d\u00e2y\u201d<\/h3>\n <p>Vi\u1ec7c b\u00e1o gi\u00e1 m\u1ed9t m\u1eabu c\u01a1 b\u1ea3n m\u00e0 kh\u00f4ng \u0111\u1ec1 c\u1eadp \u0111\u1ebfn phi\u00ean b\u1ea3n cu\u1ed9n d\u00e2y th\u00ec ch\u1eb3ng kh\u00e1c n\u00e0o kh\u00f4ng b\u00e1o gi\u00e1 g\u00ec c\u1ea3. M\u1ea1ch \u0111i\u1ec7n c\u1ee7a kh\u00e1ch h\u00e0ng \u0111\u00e3 quy\u1ebft \u0111\u1ecbnh s\u1eb5n c\u00e2u tr\u1ea3 l\u1eddi, v\u00e0 \u0111i\u1ec7n \u00e1p cu\u1ed9n d\u00e2y sai \u0111\u1ed3ng ngh\u0129a v\u1edbi vi\u1ec7c ph\u1ea3i tr\u1ea3 h\u00e0ng, g\u1eedi l\u1ea1i h\u00e0ng, v\u00e0 kh\u00e1ch h\u00e0ng s\u1ebd t\u00ecm \u0111\u1ebfn catalogue kh\u00e1c ngay t\u1eeb l\u1ea7n sau. Hai th\u00f3i quen sau \u0111\u00e2y s\u1ebd gi\u00fap gi\u1ea3i quy\u1ebft tri\u1ec7t \u0111\u1ec3 v\u1ea5n \u0111\u1ec1 n\u00e0y: h\u00e3y thi\u1ebft l\u1eadp \u0111i\u1ec7n \u00e1p cu\u1ed9n d\u00e2y v\u00e0 lo\u1ea1i ngu\u1ed3n c\u1ea5p (AC ho\u1eb7c DC) th\u00e0nh c\u00e1c tr\u01b0\u1eddng th\u00f4ng tin b\u1eaft bu\u1ed9c tr\u00ean bi\u1ec3u m\u1eabu b\u00e1o gi\u00e1 c\u1ee7a b\u1ea1n, \u0111\u1ed3ng th\u1eddi h\u01b0\u1edbng d\u1eabn nh\u00e2n vi\u00ean tr\u1ef1c \u0111i\u1ec7n tho\u1ea1i ph\u1ea3i h\u1ecfi r\u00f5 phi\u00ean b\u1ea3n cu\u1ed9n d\u00e2y khi kh\u00e1ch h\u00e0ng \u0111\u1ecdc s\u1ed1 model.<\/p>\n\n <h3>Hai \u0111\u01b0\u1eddng th\u1ec3 t\u00edch song song, v\u00e0 nh\u1eefng cu\u1ed9n d\u00e2y n\u00e0o thay \u0111\u1ed5i<\/h3>\n <p>Khi xem x\u00e9t d\u01b0\u1edbi g\u00f3c \u0111\u1ed9 nh\u00e0 ph\u00e2n ph\u1ed1i, ph\u1ed5 n\u00e0y c\u00f3 hai \u0111\u01b0\u1eddng kh\u1ed1i l\u01b0\u1ee3ng. C\u00e1c <strong>D\u00f2ng \u0111i\u1ec7n 24 VDC<\/strong> l\u00e0 v\u1eadt t\u01b0 ti\u00eau hao trong l\u0129nh v\u1ef1c PLC\/DCS; m\u1ed7i l\u1ea7n \u0111\u1ea1i tu t\u1ee7 \u0111i\u1ec1u khi\u1ec3n v\u00e0 n\u00e2ng c\u1ea5p b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n \u0111\u1ec1u ti\u00eau t\u1ed1n ch\u00fang. C\u00e1c <strong>\u0111i\u1ec7n \u00e1p \u0111\u01b0\u1eddng d\u00e2y xoay chi\u1ec1u<\/strong> (110\/120 VAC \u1edf B\u1eafc M\u1ef9, 220\u2013240 VAC \u1edf c\u00e1c khu v\u1ef1c kh\u00e1c) l\u00e0 linh ki\u1ec7n ti\u00eau hao c\u1ee7a c\u00e1c m\u00e1y m\u00f3c \u0111\u01b0\u1ee3c \u0111i\u1ec1u khi\u1ec3n tr\u1ef1c ti\u1ebfp v\u00e0 m\u1ed9t l\u01b0\u1ee3ng l\u1edbn thi\u1ebft b\u1ecb \u0111\u00e3 l\u1eafp \u0111\u1eb7t v\u1eabn \u0111ang \u0111\u01b0\u1ee3c b\u1ea3o tr\u00ec. Vi\u1ec7c ch\u1ec9 d\u1ef1 tr\u1eef 24 VDC \u0111\u1ed3ng ngh\u0129a v\u1edbi vi\u1ec7c t\u1eeb b\u1ecf m\u1ed9t c\u00e1ch \u00e2m th\u1ea7m m\u1ecdi \u0111\u01a1n \u0111\u1eb7t h\u00e0ng v\u1ec1 \u0111i\u1ec7n \u00e1p \u0111\u01b0\u1eddng d\u00e2y cho nh\u1eefng ai d\u1ef1 tr\u1eef c\u1ea3 hai lo\u1ea1i. A <strong>Cu\u1ed9n d\u00e2y \u0111a n\u0103ng 24\u2013240 V AC\/DC<\/strong> gi\u1ea3m b\u1edbt s\u1ed1 l\u01b0\u1ee3ng s\u1ea3n ph\u1ea9m \u1edf ph\u00eda AC: m\u1ed9t m\u00e3 s\u1ea3n ph\u1ea9m (SKU) c\u00f3 th\u1ec3 thay th\u1ebf h\u1ea7u h\u1ebft c\u00e1c bi\u1ebfn th\u1ec3 \u0111i\u1ec7n \u00e1p m\u1ea1ng b\u00e1n ch\u1eadm, nh\u01b0ng n\u00f3 kh\u00f4ng thay th\u1ebf \u0111\u01b0\u1ee3c ph\u00eda DC, v\u00ec d\u01b0\u1edbi m\u1ee9c kho\u1ea3ng 24 V th\u00ec kh\u00f4ng c\u00f3 l\u1ef1a ch\u1ecdn \u0111a n\u0103ng n\u00e0o. D\u00f2ng s\u1ea3n ph\u1ea9m th\u1ef1c t\u1ebf: t\u1eadp trung v\u00e0o 24 VDC, m\u1ed9t d\u1ea3i \u0111i\u1ec7n \u00e1p \u0111a n\u0103ng nh\u1ecf d\u00e0nh cho c\u00e1c \u1ee9ng d\u1ee5ng \u0111i\u1ec7n \u00e1p m\u1ea1ng, v\u00e0 c\u00e1c bi\u1ebfn th\u1ec3 5\/12 VDC d\u00f9ng trong c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed do kh\u00e1ch h\u00e0ng t\u1ef1 l\u1eafp r\u00e1p. \u0110\u00e1nh gi\u00e1 l\u01b0\u1ee3ng h\u00e0ng t\u1ed3n kho b\u1eb1ng c\u00e1ch <em>ph\u1ea1m vi ph\u1ee7 s\u00f3ng<\/em>, ch\u1ee9 kh\u00f4ng ph\u1ea3i s\u1ed1 l\u01b0\u1ee3ng m\u1eabu: m\u01b0\u1eddi m\u1eabu trong m\u1ed9t d\u1ea3i \u0111i\u1ec7n \u00e1p \u0111\u00e1p \u1ee9ng m\u1ed9t lo\u1ea1i y\u00eau c\u1ea7u; n\u0103m m\u1eabu tr\u1ea3i \u0111\u1ec1u tr\u00ean to\u00e0n d\u1ea3i \u0111\u00e1p \u1ee9ng h\u1ea7u h\u1ebft c\u00e1c y\u00eau c\u1ea7u \u0111\u00f3.<\/p>\n <p>Khi \u0111\u00e1nh gi\u00e1 nh\u00e0 cung c\u1ea5p r\u01a1le, h\u00e3y b\u1ed5 sung ti\u00eau ch\u00ed \u201c\u0111i\u1ec7n \u00e1p cu\u1ed9n d\u00e2y\u201d v\u00e0o danh s\u00e1ch ki\u1ec3m tra: m\u1ed7i d\u00f2ng r\u01a1le c\u00f3 nh\u1eefng phi\u00ean b\u1ea3n \u0111i\u1ec7n \u00e1p cu\u1ed9n d\u00e2y n\u00e0o, \u0111i\u1ec7n \u00e1p cu\u1ed9n d\u00e2y \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a nh\u01b0 th\u1ebf n\u00e0o trong m\u00e3 s\u1ea3n ph\u1ea9m, v\u00e0 li\u1ec7u b\u1ea1n c\u00f3 th\u1ec3 nh\u1eadn \u0111\u01b0\u1ee3c b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt cho t\u1eebng phi\u00ean b\u1ea3n cu\u1ed9n d\u00e2y, ch\u1ee9 kh\u00f4ng ch\u1ec9 cho t\u1eebng d\u00f2ng s\u1ea3n ph\u1ea9m hay kh\u00f4ng? OMCH\u2019s <a href=\"https:\/\/www.omch.com\/vi\/relay\/\">Trang d\u00e0nh cho gia \u0111\u00ecnh Relay<\/a> li\u1ec7t k\u00ea c\u00e1c d\u00f2ng s\u1ea3n ph\u1ea9m m\u00e0 ch\u00fang t\u00f4i ph\u00e2n ph\u1ed1i, v\u00e0 <a href=\"https:\/\/www.omch.com\/vi\/product-selection\/\">d\u1ecbch v\u1ee5 t\u01b0 v\u1ea5n l\u1ef1a ch\u1ecdn s\u1ea3n ph\u1ea9m c\u1ee7a ch\u00fang t\u00f4i<\/a> Ch\u00ednh v\u00ec l\u00fd do n\u00e0y m\u00e0 d\u1ecbch v\u1ee5 c\u1ee7a ch\u00fang t\u00f4i ra \u0111\u1eddi: h\u00e3y g\u1eedi cho ch\u00fang t\u00f4i m\u00e3 s\u1ea3n ph\u1ea9m v\u00e0 \u0111i\u1ec7n \u00e1p cu\u1ed9n d\u00e2y m\u00e0 m\u1ea1ch c\u1ee7a b\u1ea1n c\u1ea7n, v\u00e0 ch\u00fang t\u00f4i s\u1ebd x\u00e1c nh\u1eadn phi\u00ean b\u1ea3n ph\u00f9 h\u1ee3p c\u00f9ng b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a n\u00f3 tr\u01b0\u1edbc khi b\u1ea1n quy\u1ebft \u0111\u1ecbnh \u0111\u1eb7t h\u00e0ng, \u0111\u1ec3 quy t\u1eafc 75 %, h\u1eadu t\u1ed1 v\u00e0 d\u1ea3i \u0111i\u1ec7n \u00e1p \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh r\u00f5 r\u00e0ng tr\u00ean gi\u1ea5y t\u1edd, ch\u1ee9 kh\u00f4ng ph\u1ea3i ch\u1ec9 ph\u00e1t hi\u1ec7n ra sau khi r\u01a1le \u0111\u01b0\u1ee3c giao \u0111\u1ebfn.<\/p>\n <p><em>N\u1ebfu b\u1ea1n \u0111ang thay th\u1ebf c\u00e1c r\u01a1le trong t\u1ee7 \u0111i\u1ec7n ho\u1eb7c d\u1ef1 tr\u1eef ch\u00fang cho nh\u1eefng kh\u00e1ch h\u00e0ng \u0111ang th\u1ef1c hi\u1ec7n vi\u1ec7c n\u00e0y, <a href=\"https:\/\/www.omch.com\/vi\/contact\/\">li\u00ean h\u1ec7<\/a>. Ch\u00fang t\u00f4i s\u1ebd h\u1ed7 tr\u1ee3 qu\u00fd kh\u00e1ch l\u1ef1a ch\u1ecdn \u0111i\u1ec7n \u00e1p cu\u1ed9n d\u00e2y ph\u00f9 h\u1ee3p cho t\u1eebng d\u00f2ng r\u01a1le m\u00e0 ch\u00fang t\u00f4i \u0111ang c\u00f3 s\u1eb5n, t\u1eebng m\u00e3 s\u1ea3n ph\u1ea9m m\u1ed9t.<\/em><\/p>\n\n <!-- BP-cta-end -->\n <div class=\"bp-cta-end bd-reveal\">\n <div class=\"bp-cta-end-inner\">\n <p class=\"bp-cta-end-title\"><span class=\"bp-cta-end-ic\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20\" height=\"20\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" aria-hidden=\"true\"><path d=\"M22 2 11 13\"\/><path d=\"M22 2l-7 20-4-9-9-4 20-7\"\/><\/svg><\/span>Vui l\u00f2ng g\u1eedi cho ch\u00fang t\u00f4i s\u1ed1 model v\u00e0 \u0111i\u1ec7n \u00e1p cu\u1ed9n d\u00e2y<\/p>\n <p class=\"bp-cta-end-sub\">Tr\u01b0\u1edbc khi qu\u00fd kh\u00e1ch quy\u1ebft \u0111\u1ecbnh \u0111\u1eb7t h\u00e0ng, ch\u00fang t\u00f4i s\u1ebd x\u00e1c nh\u1eadn phi\u00ean b\u1ea3n r\u01a1le ph\u00f9 h\u1ee3p v\u00e0 b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a n\u00f3 tr\u00ean c\u00e1c d\u00f2ng s\u1ea3n ph\u1ea9m m\u00e0 ch\u00fang t\u00f4i \u0111ang c\u00f3 s\u1eb5n.<\/p>\n <a class=\"bp-cta-end-btn\" href=\"https:\/\/www.omch.com\/vi\/contact\/\" target=\"_self\">X\u00e1c nh\u1eadn \u0111i\u1ec7n \u00e1p cu\u1ed9n d\u00e2y c\u1ee7a t\u00f4i<span class=\"bp-cta-end-arrow\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"16\" height=\"16\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" aria-hidden=\"true\"><line x1=\"5\" y1=\"12\" x2=\"19\" y2=\"12\"\/><polyline points=\"12 5 19 12 12 19\"\/><\/svg><\/span><\/a>\n <\/div>\n <\/div>\n\n <h2>T\u00e0i li\u1ec7u tham kh\u1ea3o<\/h2>\n <ol>\n <li><a href=\"https:\/\/ac-blog.panasonic.com\/relay\/introduction-to-relays-relay-terminology-operating-coil\" target=\"_blank\" rel=\"noopener\">Panasonic Industry. \u201cGi\u1edbi thi\u1ec7u v\u1ec1 r\u01a1le \u2014 Thu\u1eadt ng\u1eef v\u1ec1 r\u01a1le: Cu\u1ed9n d\u00e2y \u0111i\u1ec1u khi\u1ec3n.\u201d<\/a> 2020.<\/li>\n <li><a href=\"https:\/\/components.omron.com\/us-en\/faq\/relays\/FAQE10015\" target=\"_blank\" rel=\"noopener\">Omron Components. \u201cC\u00e1ch \u0111\u1ecdc \u0111i\u1ec7n \u00e1p ho\u1ea1t \u0111\u1ed9ng, \u0111i\u1ec7n \u00e1p ng\u1eaft v\u00e0 \u0111i\u1ec7n \u00e1p t\u1ed1i \u0111a.\u201d<\/a> 2021.<\/li>\n <li><a href=\"https:\/\/www.te.com\/en\/products\/relays-and-contactors\/electromechanical-relays\/intersection\/coil-voltage-temperature-compensation.html\" target=\"_blank\" rel=\"noopener\">TE Connectivity. \u201cB\u00f9 \u0111i\u1ec7n \u00e1p v\u00e0 nhi\u1ec7t \u0111\u1ed9 cu\u1ed9n d\u00e2y.\u201d<\/a><\/li>\n <li><a href=\"https:\/\/stoklink.com\/blogs\/technical\/relay-coil-voltages-24vdc-110vac-230vac\" target=\"_blank\" rel=\"noopener\">Stoklink. \u201c\u0110i\u1ec7n \u00e1p cu\u1ed9n d\u00e2y r\u01a1le: 24 VDC so v\u1edbi 110 VAC so v\u1edbi 230 VAC.\u201d<\/a> 2026.<\/li>\n <li><a href=\"https:\/\/hwrelay.com\/how-do-i-know-which-coil-voltage-to-choose-for-a-power-relay-switch\/\" target=\"_blank\" rel=\"noopener\">Hwrelay. \u201cC\u00e1ch ch\u1ecdn \u0111i\u1ec7n \u00e1p cu\u1ed9n d\u00e2y c\u1ee7a r\u01a1le c\u00f4ng su\u1ea5t.\u201d<\/a> 2025.<\/li>\n <li><a href=\"https:\/\/forum.digikey.com\/t\/understanding-relay-coil-voltage-specifications\/946\" target=\"_blank\" rel=\"noopener\">Di\u1ec5n \u0111\u00e0n DigiKey. \u201cHi\u1ec3u v\u1ec1 c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt v\u1ec1 \u0111i\u1ec7n \u00e1p cu\u1ed9n d\u00e2y r\u01a1le.\u201d<\/a> 2017.<\/li>\n <li><a href=\"https:\/\/www.reddit.com\/r\/PLC\/comments\/1ew2m16\/what_happens_when_ac_power_is_applied_to_the_dc\/\" target=\"_blank\" rel=\"noopener\">Reddit r\/PLC. \u201c\u0110i\u1ec1u g\u00ec s\u1ebd x\u1ea3y ra khi c\u1ea5p ngu\u1ed3n xoay chi\u1ec1u (AC) v\u00e0o cu\u1ed9n d\u00e2y m\u1ed9t chi\u1ec1u (DC) c\u1ee7a r\u01a1le?\u201d<\/a> 2024.<\/li>\n <li><a href=\"https:\/\/www.reddit.com\/r\/AskElectronics\/comments\/1v8xixd\/for_a_small_power_relay_does_reducing_coil\/\" target=\"_blank\" rel=\"noopener\">Reddit r\/AskElectronics. \u201c\u0110\u1ed1i v\u1edbi m\u1ed9t r\u01a1le c\u00f4ng su\u1ea5t nh\u1ecf, vi\u1ec7c gi\u1ea3m \u0111i\u1ec7n \u00e1p cu\u1ed9n d\u00e2y c\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ho\u1ea1t \u0111\u1ed9ng kh\u00f4ng?\u201d<\/a> 2026.<\/li>\n <li><a href=\"https:\/\/www.omch.com\/vi\/relay\/\" target=\"_blank\" rel=\"noopener\">OMCH. \u201cRelay \u2014 C\u00e1c d\u00f2ng s\u1ea3n ph\u1ea9m.\u201d<\/a><\/li>\n <li><a href=\"https:\/\/www.omch.com\/vi\/product-selection\/\" target=\"_blank\" rel=\"noopener\">OMCH. \u201cD\u1ecbch v\u1ee5 l\u1ef1a ch\u1ecdn s\u1ea3n ph\u1ea9m.\u201d<\/a><\/li>\n <li><a href=\"https:\/\/www.omch.com\/vi\/contact\/\" target=\"_blank\" rel=\"noopener\">OMCH. \u201cLi\u00ean h\u1ec7.\u201d<\/a><\/li>\n <li><a href=\"https:\/\/www.omch.com\/vi\/\" target=\"_blank\" rel=\"noopener\">OMCH. \u201cTrang ch\u1ee7.\u201d<\/a><\/li>\n <\/ol>\n\n <\/article>\n<\/div>\n<!-- \u2191\u2191\u2191 Fragment ends here. \u2191\u2191\u2191 -->\n<\/body><\/html>","protected":false},"excerpt":{"rendered":"<p>Gi\u1ea3i th\u00edch v\u1ec1 \u0111i\u1ec7n \u00e1p cu\u1ed9n d\u00e2y r\u01a1le: \u00dd ngh\u0129a c\u1ee7a con s\u1ed1 tr\u00ean v\u1ecf r\u01a1le (v\u00e0 c\u00e1ch l\u1ef1a ch\u1ecdn ph\u00f9 h\u1ee3p) V\u1ecf r\u01a1le ghi hai m\u1ee9c \u0111i\u1ec7n \u00e1p: \u201c24 VDC\u201d v\u00e0 \u201c250 VAC 10 A\u201d. M\u1ee9c \u0111\u1ea7u ti\u00ean c\u1ea5p ngu\u1ed3n cho r\u01a1le; m\u1ee9c th\u1ee9 hai l\u00e0 \u0111i\u1ec7n \u00e1p m\u00e0 r\u01a1le \u0111i\u1ec1u khi\u1ec3n. Vi\u1ec7c nh\u1ea7m l\u1eabn gi\u1eefa hai m\u1ee9c n\u00e0y l\u00e0 sai l\u1ea7m ph\u1ed5 bi\u1ebfn nh\u1ea5t khi s\u1eed d\u1ee5ng r\u01a1le trong th\u1ef1c t\u1ebf, v\u00e0 h\u1eadu qu\u1ea3 l\u00e0 r\u01a1le b\u1ecb ch\u00e1y [\u2026]<\/p>","protected":false},"author":4,"featured_media":12232,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_seopress_robots_primary_cat":"none","_seopress_titles_title":"Relay Coil Voltage: How to Choose and Match It","_seopress_titles_desc":"Learn how relay coil voltage works, read AC\/DC ratings, diagnose undervoltage and choose the correct replacement.","_seopress_robots_index":"","footnotes":""},"categories":[79],"tags":[],"class_list":["post-12233","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\/12233","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=12233"}],"version-history":[{"count":1,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/posts\/12233\/revisions"}],"predecessor-version":[{"id":12236,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/posts\/12233\/revisions\/12236"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/media\/12232"}],"wp:attachment":[{"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/media?parent=12233"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/categories?post=12233"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/tags?post=12233"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}