Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn<\/p>\n\n\n\n
Role (relay) l\u00e0 m\u1ed9t trong nh\u1eefng linh ki\u1ec7n \u0111i\u1ec7n t\u1eed \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn hi\u1ec7n nay \u0111\u1ec3 duy tr\u00ec s\u1ef1 \u1ed5n \u0111\u1ecbnh, an to\u00e0n trong qu\u00e1 tr\u00ecnh v\u1eadn h\u00e0nh h\u1ec7 th\u1ed1ng \u0111i\u1ec7n. Tuy nhi\u00ean, kh\u00f4ng ph\u1ea3i ai c\u0169ng gi\u1ea3i th\u00edch \u0111\u01b0\u1ee3c kh\u00e1i ni\u1ec7m role (relay) l\u00e0 g\u00ec? C\u1ea5u t\u1ea1o v\u00e0 nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng?. T\u1ea5t c\u1ea3 s\u1ebd \u0111\u01b0\u1ee3c ch\u00fang t\u00f4i gi\u1ea3i \u0111\u00e1p d\u01b0\u1edbi \u0111\u00e2y, qu\u00fd kh\u00e1ch h\u00e0ng \u0111\u1eebng b\u1ecf l\u1ee1 b\u1ea5t th\u00f4ng tin n\u00e0o d\u01b0\u1edbi \u0111\u00e2y.<\/p>\n\n\n\n
Role l\u00e0 g\u00ec? R\u01a1 le nhi\u1ec7t l\u00e0 g\u00ec?<\/p>\n\n\n\n
Role c\u00f2n c\u00f3 t\u00ean g\u1ecdi kh\u00e1c l\u00e0 relay ho\u1eb7c r\u01a1-le. Relay la gi? L\u00e0 lo\u1ea1i c\u00f4ng t\u1eafc chuy\u1ec3n \u0111\u1ed5i ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng \u0111i\u1ec7n. Ro le \u0111\u01b0\u1ee3c coi nh\u01b0 m\u1ed9t chi\u1ebfc c\u00f4ng t\u1eafc \u0111i\u1ec7n b\u1edfi ch\u00fang c\u00f3 2 tr\u1ea1ng th\u00e1i \u0111\u00f3 l\u00e0 b\u1eadt v\u00e0 t\u1eaft. Rele \u1edf tr\u1ea1ng th\u00e1i b\u1eadt hay t\u1eaft \u0111\u1ec1u ph\u1ee5 thu\u1ed9c v\u00e0o vi\u1ec7c c\u00f3 d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua hay kh\u00f4ng.<\/p>\n\n\n\n
B\u1ea3n ch\u1ea5t c\u1ee7a r\u01a1 le l\u00e0 m\u1ed9t nam ch\u00e2m \u0111i\u1ec7n v\u00e0 h\u1ec7 th\u1ed1ng c\u00e1c ti\u1ebfp \u0111i\u1ec3m \u0111\u00f3ng c\u1eaft c\u00f3 thi\u1ebft k\u1ebf<\/a> module h\u00f3a \u0111\u1ec3 c\u00f4ng vi\u1ec7c l\u1eafp \u0111\u1eb7t d\u1ec5 d\u00e0ng h\u01a1n. Hi\u1ec3u c\u00e1ch kh\u00e1c th\u00ec relay gi\u1ed1ng nh\u01b0 m\u1ed9t lo\u1ea1i \u0111\u00f2n b\u1ea9y \u0111i\u1ec3n, khi ch\u00fang ta k\u00edch n\u00f3 b\u1eb1ng d\u00f2ng \u0111i\u1ec7n nh\u1ecf th\u00ec n\u00f3 s\u1ebd b\u1eadt \u201c\u0111\u00f2n b\u1ea9y\u201d m\u1ed9t thi\u1ebft b\u1ecb \u0111i\u1ec7n n\u00e0o \u0111\u00f3 s\u1eed d\u1ee5ng \u0111i\u1ec7n l\u1edbn h\u01a1n nhi\u1ec1u.<\/p>\n\n\n\n \u0110i\u1ec7n \u00e1p v\u00e0 d\u00f2ng \u0111i\u1ec7n \u0111\u01b0\u1ee3c relay chuy\u1ec3n m\u1ea1ch s\u1ebd r\u1ea5t kh\u00e1c so v\u1edbi t\u00edn hi\u1ec7u \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 k\u00edch ho\u1ea1t ho\u1eb7c c\u1ea5p \u0111i\u1ec7n cho ro le. T\u1ef1u chung, r\u01a1le l\u00e0 thi\u1ebft b\u1ecb th\u00f4ng d\u1ee5ng, g\u1ecdn nh\u1eb9, gi\u00e1 th\u00e0nh r\u1ebb d\u1ec5 ti\u1ebfp c\u1eadn v\u00e0 s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong cu\u1ed9c s\u1ed1ng nh\u1ea5t l\u00e0 trong c\u00e1c \u1ee9ng d\u1ee5ng t\u1ef1 \u0111\u1ed9ng h\u00f3a. Ch\u00fang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng k\u00e8m v\u1edbi c\u00e1c lo\u1ea1i c\u1ea3m bi\u1ebfn b\u00e1o m\u1ee9c nh\u01b0 \u00e1p su\u1ea5t, \u0111\u1ed9 \u1ea9m hay c\u1ea3m bi\u1ebfn nhi\u1ec7t \u0111\u1ed9,\u2026.<\/p>\n\n\n\n C\u1ea5u t\u1ea1o c\u1ee7a r\u01a1 le d\u00f2ng \u0111i\u1ec7n<\/p>\n\n\n\n R\u01a1 le \u0111i\u1ec7n t\u1eed s\u1ebd bao g\u1ed3m m\u1ed9t cu\u1ed9n d\u00e2y kim lo\u1ea1i \u0111\u1ed3ng ho\u1eb7c nh\u00f4m cu\u1ed1n quanh m\u1ed9t l\u00f5i s\u1eaft t\u1eeb. B\u1ed9 ph\u1eadn n\u00e0y c\u00f3 ph\u1ea7n t\u0129nh g\u1ecdi l\u00e0 \u00e1ch t\u1eeb (Yoke) v\u00e0 ph\u1ea7n \u0111\u1ed9ng g\u1ecdi l\u00e0 ph\u1ea7n c\u1ee9ng (Armature).<\/p>\n\n\n\n Ph\u1ea7n c\u1ee9ng s\u1ebd \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i v\u1edbi m\u1ed9t ti\u1ebfp \u0111i\u1ec3m \u0111\u1ed9ng, cu\u1ed9n d\u00e2y c\u00f3 t\u00e1c d\u1ee5ng h\u00fat thanh ti\u1ebfp \u0111i\u1ec3m \u0111\u1ec3 t\u1ea1o th\u00e0nh tr\u1ea1ng th\u00e1i NO v\u00e0 NC. M\u1ea1ch l\u1ef1c (m\u1ea1ch ti\u1ebfp \u0111i\u1ec3m) c\u00f3 nhi\u1ec7m v\u1ee5 \u0111\u00f3ng c\u1eaft thi\u1ebft b\u1ecb truy\u1ec1n t\u1ea3i v\u1edbi d\u00f2ng \u0111i\u1ec7n nh\u1ecf v\u00e0 \u0111\u01b0\u1ee3c c\u00e1ch ly b\u1edfi m\u1ed9t cu\u1ed9n h\u00fat.<\/p>\n\n\n\n C\u01a1 c\u1ea5u c\u1ee7a r\u01a1 le g\u1ed3m c\u00f3:<\/p>\n\n\n\n C\u01a1 c\u1ea5u thu: Ti\u1ebfp nh\u1eadn t\u00edn hi\u1ec7u \u0111\u1ea7u v\u00e0o v\u00e0 bi\u1ebfn \u0111\u1ed5i n\u00f3 th\u00e0nh c\u00e1c \u0111\u1ea1i l\u01b0\u1ee3ng c\u1ea7n thi\u1ebft \u0111\u1ec3 r\u01a1 le ho\u1ea1t \u0111\u1ed9ng.<\/p>\n\n\n\n C\u01a1 c\u1ea5u trung gian: So s\u00e1nh c\u00e1c \u0111\u1ea1i l\u01b0\u1ee3ng \u0111\u00e3 \u0111\u01b0\u1ee3c bi\u1ebfn \u0111\u1ed5i v\u1edbi m\u1eabu r\u1ed3i truy\u1ec1n t\u00edn hi\u1ec7u \u0111\u1ebfn c\u01a1 quan ch\u1ea5p h\u00e0nh.<\/p>\n\n\n\n C\u01a1 c\u1ea5u ch\u1ea5p h\u00e0ng: Ph\u00e1t t\u00edn hi\u1ec7u cho m\u1ea1ch \u0111i\u1ec1u khi\u1ec3n.<\/p>\n\n\n\n Nguy\u00ean l\u00fd l\u00e0m vi\u1ec7c c\u1ee7a relay<\/p>\n\n\n\n C\u00e1c b\u1ea1n quan s\u00e1t s\u01a1 \u0111\u1ed3 m\u1ea1ch relay d\u01b0\u1edbi \u0111\u00e2y \u0111\u1ec3 hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 nguy\u00ean l\u00fd l\u00e0m vi\u1ec7c c\u1ee7a ro le. Khi d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua m\u1ea1ch th\u1ee9 nh\u1ea5t (1) v\u00e0 n\u00f3 s\u1ebd k\u00edch ho\u1ea1t nam ch\u00e2m \u0111i\u1ec7n (m\u00e0u n\u00e2u), t\u1ea1o ra t\u1eeb tr\u01b0\u1eddng \u0111\u1ec3 thu h\u00fat m\u1ed9t ti\u1ebfp \u0111i\u1ec3m (m\u00e0u \u0111\u1ecf), k\u00edch ho\u1ea1t m\u1ea1ch th\u1ee9 hai (2). Khi t\u1eaft ngu\u1ed3n, m\u1ed9t l\u00f2 xo \u0111\u01b0\u1ee3c l\u1eafp tr\u01b0\u1edbc v\u00e0o ti\u1ebfp \u0111i\u1ec3m s\u1ebd c\u00f3 nhi\u1ec7m v\u1ee5 k\u00e9o ti\u1ebfp \u0111i\u1ec3m tr\u1edf l\u1ea1i v\u1ecb tr\u00ed ban \u0111\u1ea7u, t\u00e1ch m\u1ea1ch th\u1ee9 hai m\u1ed9t l\u1ea7n n\u1eefa.<\/p>\n\n\n\n =>> T\u00f3m l\u1ea1i, nguy\u00ean l\u00fd chung c\u1ee7a c\u00e1c r\u01a1 le \u0111i\u1ec7n t\u1eeb g\u1ed3m c\u00e1c b\u01b0\u1edbc \u0111\u00f3 l\u00e0:<\/p>\n\n\n\n Ngu\u1ed3n \u0111i\u1ec7n c\u1ea7n ph\u1ea3i \u0111\u01b0\u1ee3c cung c\u1ea5p cho cu\u1ed9n d\u00e2y \u0111\u1ec3 t\u1ea1o ra t\u1eeb tr\u01b0\u1eddng.<\/p>\n\n\n\n T\u1eeb tr\u01b0\u1eddng \u0111\u01b0\u1ee3c chuy\u1ec3n th\u00e0nh c\u01a1 th\u00f4ng qua ho\u1ea1t \u0111\u1ed9ng h\u00fat ph\u1ea7n \u1ee9ng.<\/p>\n\n\n\n Ph\u1ea7n \u1ee9ng c\u00f3 nhi\u1ec7m v\u1ee5 ch\u00ednh l\u00e0 \u0111\u00f3ng\/m\u1edf m\u1ed9t ho\u1eb7c nhi\u1ec1u ti\u1ebfp \u0111i\u1ec3m.<\/p>\n\n\n\n C\u00e1c ti\u1ebfp \u0111i\u1ec3m cho ph\u00e9p chuy\u1ec3n \u0111o\u1ea1n m\u1ea1ch \u0111i\u1ec7n sang t\u1ea3i nh\u01b0 c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed kh\u00e1c nh\u01b0 \u0111\u1ed9ng c\u01a1, qu\u1ea1t hay b\u00f3ng \u0111\u00e8n,\u2026.<\/p>\n\n\n\n Sau khi \u0111i\u1ec7n \u00e1p b\u1ecb lo\u1ea1i b\u1ecf th\u00ec t\u1eeb tr\u01b0\u1eddng bi\u1ebfn m\u1ea5t, c\u00e1c ti\u1ebfp \u0111i\u1ec3m s\u1ebd tr\u1edf v\u1ec1 v\u1ecb tr\u00ed nh\u01b0 ban \u0111\u1ea7u.<\/p>\n\n\n\n C\u00e1c ti\u1ebfp \u0111i\u1ec3m c\u00f3 th\u01b0\u1eddng \u0111\u00f3ng ho\u1eb7c m\u1edf.<\/p>\n\n\n\n C\u00e1c lo\u1ea1i relay (r\u01a1 le) ph\u1ed5 bi\u1ebfn tr\u00ean th\u1ecb tr\u01b0\u1eddng hi\u1ec7n nay<\/p>\n\n\n\n Tr\u00ean th\u1ecb tr\u01b0\u1eddng hi\u1ec7n nay c\u00f3 2 d\u1ea1ng r\u01a1 le ph\u1ed5 bi\u1ebfn \u0111\u00f3 l\u00e0:<\/p>\n\n\n\n Module r\u01a1 le \u0111\u00f3ng \u1edf m\u1ee9c th\u1ea5p, n\u1ed1i c\u1ef1c \u00e2m v\u00e0o v\u1ecb tr\u00ed ch\u00e2n t\u00edn hi\u1ec7u r\u01a1 le s\u1ebd \u0111\u00f3ng.<\/p>\n\n\n\n Module r\u01a1 le \u0111\u00f3ng \u1edf m\u1ee9c cao, n\u1ed1i v\u1edbi c\u1ef1c d\u01b0\u01a1ng v\u00e0o ch\u00e2n t\u00edn hi\u1ec7u r\u01a1-le s\u1ebd \u0111\u00f3ng.<\/p>\n\n\n\n N\u1ebfu ch\u00fang ta so s\u00e1nh 2 module r\u01a1 le c\u00f3 c\u00f9ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt th\u00ec h\u1ea7u h\u1ebft c\u00e1c linh ki\u1ec7n b\u00ean trong ch\u00fang \u0111\u1ec1u gi\u1ed1ng nhau ch\u1ec9 kh\u00e1c nhau \u1edf transistor c\u1ee7a m\u1ed7i module. Ch\u00ednh v\u00ec b\u1ed9 ph\u1eadn transistor m\u00e0 ng\u01b0\u1eddi ta chia l\u00e0m 2 lo\u1ea1i module relay \u0111\u00f3 l\u00e0 NPN- k\u00edch \u1edf m\u1ee9c cao v\u00e0 PNP- k\u00edch \u1edf m\u1ee9c th\u1ea5p.<\/p>\n\n\n\n H\u01b0\u1edbng d\u1eabn c\u00e1ch x\u00e1c \u0111\u1ecbnh tr\u1ea1ng th\u00e1i c\u1ee7a relay<\/p>\n\n\n\n \u0110\u1ec3 x\u00e1c \u0111\u1ecbnh tr\u1ea1ng th\u00e1i c\u1ee7a m\u1ed9t r\u01a1 le b\u1ea1n c\u00f3 th\u1ec3 l\u1ef1a ch\u1ecdn 1 trong 3 c\u00e1ch sau:<\/p>\n\n\n\n C\u00e1ch 1: H\u1ecfi ng\u01b0\u1eddi cung c\u1ea5p, b\u00e1n ro le. \u0110\u00e2y l\u00e0 c\u00e1ch ph\u1ed5 bi\u1ebfn v\u00e0 nhanh nh\u1ea5t m\u00e0 m\u1ecdi ng\u01b0\u1eddi \u0111ang \u00e1p d\u1ee5ng.<\/p>\n\n\n\n C\u00e1ch 2: Ki\u1ec3m tra b\u1eb1ng vi\u1ec7c c\u1ea5p ngu\u1ed3n v\u00e0o c\u00e1c ch\u00e2n \u0111i\u1ec1u khi\u1ec3n c\u1ee7a module relay.<\/p>\n\n\n\n C\u00e1ch 3: B\u1ea1n c\u00f3 th\u1ec3 t\u00ecm ki\u1ebfm th\u00f4ng tin tr\u00ean c\u1ee7a google module r\u01a1 le c\u1ee7a b\u1ea1n \u0111ang d\u00f9ng xem n\u00f3 thu\u1ed9c lo\u1ea1i n\u00e0o nh\u00e9. N\u1ebfu n\u00f3 thu\u1ed9c d\u1ea1ng NPN th\u00ec \u0111\u00f3 l\u00e0 r\u01a1 le m\u1ee9c cao v\u00e0 PNP th\u00ec l\u00e0 r\u01a1 le m\u1ee9c th\u1ea5p.<\/p>\n\n\n\n C\u00e1c th\u00f4ng s\u1ed1 th\u01b0\u1eddng th\u1ea5y c\u1ee7a m\u1ed9t r\u01a1le \u0111i\u1ec7n t\u1eeb<\/p>\n\n\n\n Hi\u1ec7u \u0111i\u1ec7n th\u1ebf k\u00edch t\u1ed1i \u01b0u<\/p>\n\n\n\n Tr\u00ean r\u01a1le \u0111i\u1ec7n th\u00ec hi\u1ec7u \u0111i\u1ec7n th\u1ebf l\u00e0 th\u00f4ng s\u1ed1 quan tr\u1ecdng nh\u1ea5t v\u00ec n\u00f3 s\u1ebd quy\u1ebft \u0111\u1ecbnh \u0111\u1ebfn vi\u1ec7c b\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng \u0111\u01b0\u1ee3c ch\u00fang hay kh\u00f4ng. V\u00ed d\u1ee5 nh\u01b0 b\u1ea1n c\u1ea7n m\u1ed9t module r\u01a1 le s\u1ebd l\u00e0m nhi\u1ec7m v\u1ee5 t\u1eaft m\u1ed9t b\u00f3ng \u0111\u00e8n c\u00f3 \u0111i\u1ec7n \u00e1p 220V, khi tr\u1eddi t\u1ed1i c\u1ea3m bi\u1ebfn \u00e1nh s\u00e1ng s\u1ebd ho\u1ea1t \u0111\u1ed9ng \u1edf m\u1ee9c 5-12V. L\u00fac n\u00e0y b\u1ea1n c\u00f3 th\u1ec3 y\u00eau c\u1ea7u h\u1ecd b\u00e1n lo\u1ea1i module relay 5V ho\u1eb7c module relay 12V k\u00edch \u1edf m\u1ee9c cao. Nh\u01b0 v\u1eady th\u00ec thi\u1ebft b\u1ecb c\u1ee7a b\u1ea1n m\u1edbi c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng t\u1ed1t \u0111\u01b0\u1ee3c.<\/p>\n\n\n\n Hi\u1ec7u \u0111i\u1ec7n th\u1ebf v\u00e0 c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n t\u1ed1i \u0111a<\/p>\n\n\n\n Th\u00f4ng s\u1ed1 n\u00e0y s\u1ebd hi\u1ec3n th\u1ecb m\u1ee9c \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n c\u0169ng nh\u01b0 hi\u1ec7u \u0111i\u1ec7n th\u1ebf t\u1ed1i \u0111a c\u1ee7a thi\u1ebft b\u1ecb khi b\u1ea1n mu\u1ed1n \u0111\u00f3ng\/ng\u1eaft \u0111\u1ec3 \u0111\u1ea5u d\u00e2y v\u1edbi r\u01a1-le. Ch\u00fang th\u01b0\u1eddng in l\u00ean tr\u00ean thi\u1ebft b\u1ecb n\u00ean b\u1ea1n d\u1ec5 d\u00e0ng quan s\u00e1t:<\/p>\n\n\n\n 10A-250VAC: C\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n t\u1ed1i \u0111a qua c\u00e1c ti\u1ebfp \u0111i\u1ec3m c\u1ee7a r\u01a1le l\u00e0 10A, hi\u1ec7u \u0111i\u1ec7n th\u1ebf l\u00e0 250VAC<\/p>\n\n\n\n 10A-125VAC: C\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n t\u1ed1i \u0111a qua c\u00e1c ti\u1ebfp \u0111i\u1ec3m c\u1ee7a r\u01a1le l\u00e0 10A, hi\u1ec7u \u0111i\u1ec7n th\u1ebf l\u00e0 125VAC<\/p>\n\n\n\n 10A-30VAC: C\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n t\u1ed1i \u0111a qua c\u00e1c ti\u1ebfp \u0111i\u1ec3m c\u1ee7a r\u01a1le l\u00e0 10A, hi\u1ec7u \u0111i\u1ec7n th\u1ebf l\u00e0 30VAC<\/p>\n\n\n\n 10A-28VAC: C\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n t\u1ed1i \u0111a qua c\u00e1c ti\u1ebfp \u0111i\u1ec3m c\u1ee7a r\u01a1le l\u00e0 10A, hi\u1ec7u \u0111i\u1ec7n th\u1ebf l\u00e0 28VAC<\/p>\n\n\n\n SRD-05VDC-SL-C: Hi\u1ec7u \u0111i\u1ec7n th\u1ebf k\u00edch t\u1ed1i \u01b0u s\u1ebd l\u00e0 5V<\/p>\n\n\n\n C\u00e1ch s\u1eed d\u1ee5ng relay (r\u01a1-le)<\/p>\n\n\n\n Th\u00f4ng th\u01b0\u1eddng m\u1ed9t r\u01a1 le s\u1ebd c\u00f3 6 ch\u00e2n g\u1ed3m 3 ch\u00e2n k\u00edch v\u00e0 3 ch\u00e2n k\u1ebft n\u1ed1i v\u1edbi thi\u1ebft b\u1ecb \u0111i\u1ec7n \u00e1p cao. Ch\u00fang ta s\u1ebd \u0111\u1ea5u d\u00e2y theo c\u00e1ch sau:<\/p>\n\n\n\n V\u1edbi 3 ch\u00e2n k\u00edch<\/p>\n\n\n\n \u2013 : D\u00f9ng \u0111\u1ec3 n\u1ed1i c\u1ef1c \u00e2m<\/p>\n\n\n\n s: \u0110\u00e2y l\u00e0 ch\u00e2n t\u00edn hi\u1ec7u, l\u00e0m nhi\u1ec7m v\u1ee5 k\u00edch r\u01a1 le.<\/p>\n\n\n\n N\u1ebfu nh\u01b0 b\u1ea1n d\u00f9ng role k\u00edch \u1edf m\u1ee9c cao v\u00e0 c\u00e2n s b\u1ea1n c\u1ea5p th\u1ebf d\u01b0\u01a1ng v\u00e0o r\u01a1 le c\u1ee7a b\u1ea1n s\u1ebd \u0111\u01b0\u1ee3c k\u00edch v\u00e0 ng\u01b0\u1ee3c l\u1ea1i. B\u1ea1n th\u1ef1c hi\u1ec7n t\u01b0\u01a1ng t\u1ef1 nh\u01b0 r\u01a1 le m\u1ee9c th\u1ea5p<\/p>\n\n\n\n V\u1edbi 3 ch\u00e2n k\u00edch c\u00f2n l\u1ea1i<\/p>\n\n\n\n COM: Ch\u00e2n n\u1ed1i v\u1edbi 1 ch\u00e2n b\u1ea5t k\u1ef3 c\u1ee7a \u0111\u1ed3 d\u00f9ng \u0111i\u1ec7n nh\u01b0ng b\u1ea1n n\u00ean m\u1eafc d\u00e2y ch\u00e2n l\u1eeda (n\u00f3ng) n\u1ebfu d\u00f9ng hi\u1ec7u \u0111i\u1ec7n th\u1ebf xoay chi\u1ec1u v\u00e0 c\u1ef1c d\u01b0\u01a1ng n\u1ebfu l\u00e0 hi\u1ec7u \u0111i\u1ec7n th\u1ebf m\u1ed9t chi\u1ec1u<\/p>\n\n\n\n ON ho\u1eb7c NO: Ch\u00e2n n\u00e0y b\u1ea1n s\u1ebd n\u1ed1i v\u1edbi ch\u00e2n l\u1eeda (n\u00f3ng) n\u1ebfu d\u00f9ng \u0111i\u1ec7n xoay chi\u1ec1u v\u00e0 c\u1ef1c d\u01b0\u01a1ng n\u1ebfu l\u00e0 d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u.<\/p>\n\n\n\n OFF ho\u1eb7c NC: Ch\u00e2n n\u00e0y s\u1ebd n\u1ed1i v\u1edbi ch\u00e2n trung h\u00f2a (ch\u00e2n l\u1ea1nh) n\u1ebfu d\u00f9ng \u0111i\u1ec7n xoay chi\u1ec1u v\u00e0 c\u1ef1c \u00e2m c\u1ee7a ngu\u1ed3n n\u1ebfu d\u00f9ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u.<\/p>\n\n\n\n Nguy\u00ean t\u1eafc khi v\u1eadn h\u00e0nh m\u1ea1ch relay<\/p>\n\n\n\n \u0110\u1ec3 m\u1ea1ch \u0111i\u1ec1u khi\u1ec3n relay \u0111\u00f3ng ng\u1eaft theo th\u1eddi gian hi\u1ec7u qu\u1ea3, trong qu\u00e1 tr\u00ecnh s\u1eed d\u1ee5ng b\u1ea1n n\u00ean th\u1ef1c hi\u1ec7n theo m\u1ed9t s\u1ed1 nguy\u00ean t\u1eafc sau:<\/p>\n\n\n\n Ngu\u1ed3n \u0111i\u1ec7n \u0111\u01b0\u1ee3c cung c\u1ea5p cho cu\u1ed9n d\u00e2y \u0111\u1ec3 t\u1ea1o t\u1eeb tr\u01b0\u1eddng.<\/p>\n\n\n\n T\u1eeb tr\u01b0\u1eddng s\u1ebd \u0111\u01b0\u1ee3c chuy\u1ec3n th\u00e0nh c\u01a1 th\u00f4ng qua h\u00fat ph\u1ea7n \u1ee9ng<\/p>\n\n\n\n Ph\u1ea7n c\u1ee9ng c\u00f3 nhi\u1ec7m v\u1ee5 \u0111\u00f3ng\/m\u1edf m\u1ed9t hay nhi\u1ec1u ti\u1ebfp \u0111i\u1ec3m<\/p>\n\n\n\n C\u00e1c ti\u1ebfp \u0111i\u1ec3m cho ph\u00e9p chuy\u1ec3n m\u1ea1ch \u0111i\u1ec7n sang t\u1ea3i gi\u1ed1ng nh\u01b0 c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed kh\u00e1c nh\u01b0 \u0111\u1ed9ng c\u01a1, qu\u1ea1t v\u00e0 b\u00f3ng \u0111\u00e8n,\u2026<\/p>\n\n\n\n Sau khi \u0111i\u1ec7n \u00e1p \u0111\u01b0\u1ee3c lo\u1ea1i b\u1ecf th\u00ec t\u1eeb tr\u01b0\u1eddng s\u1ebd bi\u1ebfn m\u1ea5t v\u00e0 c\u00e1c ti\u1ebfp \u0111i\u1ec3m s\u1ebd tr\u1edf l\u1ea1i v\u00ed nh\u01b0 nh\u01b0 ban \u0111\u1ea7u.<\/p>\n\n\n\n C\u00e1c ti\u1ebfp \u0111i\u1ec3m th\u01b0\u1eddng h\u1edf ho\u1eb7c th\u01b0\u1eddng \u0111\u00f3ng.<\/p>\n\n\n\n V\u1edbi th\u00f4ng tin trong n\u1ed9i dung b\u00e0i vi\u1ebft \u201cRole (relay) l\u00e0 g\u00ec, c\u1ea5u t\u1ea1o v\u00e0 nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a relay\u201d mong r\u1eb1ng s\u1ebd gi\u00fap \u00edch b\u1ea1n. N\u1ebfu c\u00f3 c\u00e2u h\u1ecfi n\u00e0o c\u1ea7n \u0111\u01b0\u1ee3c gi\u1ea3i \u0111\u00e1p h\u00e3y comment ph\u00eda d\u01b0\u1edbi, \u0111\u1ed9i ng\u0169 nh\u00e2n vi\u00ean t\u01b0 v\u1ea5n<\/a> c\u1ee7a ch\u00fang t\u00f4i s\u1eb5n s\u00e0ng h\u1ed7 tr\u1ee3 b\u1ea1n m\u1ecdi l\u00fac m\u1ecdi n\u01a1i v\u00e0 mi\u1ec5n ph\u00ed ho\u00e0n to\u00e0n.<\/p>\n\n\n\n <\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":" Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn Role (relay) l\u00e0 m\u1ed9t trong nh\u1eefng linh ki\u1ec7n \u0111i\u1ec7n t\u1eed \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn hi\u1ec7n nay \u0111\u1ec3 duy tr\u00ec s\u1ef1 \u1ed5n \u0111\u1ecbnh, an to\u00e0n trong qu\u00e1 tr\u00ecnh v\u1eadn h\u00e0nh h\u1ec7 th\u1ed1ng \u0111i\u1ec7n. Tuy nhi\u00ean, kh\u00f4ng ph\u1ea3i ai c\u0169ng gi\u1ea3i th\u00edch \u0111\u01b0\u1ee3c kh\u00e1i ni\u1ec7m role (relay) l\u00e0 g\u00ec? C\u1ea5u […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[7],"tags":[],"class_list":["post-3418","post","type-post","status-publish","format-standard","hentry","category-vat-ly"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/3418","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=3418"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/3418\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=3418"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=3418"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=3418"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}