{"id":22466,"date":"2026-03-24T19:45:40","date_gmt":"2026-03-24T11:45:40","guid":{"rendered":"https:\/\/viox.com\/?p=22466"},"modified":"2026-03-24T19:45:42","modified_gmt":"2026-03-24T11:45:42","slug":"latching-vs-non-latching-relay-guide","status":"publish","type":"post","link":"https:\/\/test.viox.com\/cs\/latching-vs-non-latching-relay-guide\/","title":{"rendered":"Zaji\u0161\u0165ovac\u00ed vs. nezaji\u0161\u0165ovac\u00ed rel\u00e9: Kompletn\u00ed pr\u016fvodce v\u00fdb\u011brem"},"content":{"rendered":"<div class=\"product-intro\">\n<p>Pokud vyb\u00edr\u00e1te mezi <strong>pam\u011b\u0165ov\u00fdm rel\u00e9<\/strong> a <strong>nepam\u011b\u0165ov\u00fdm rel\u00e9<\/strong>, jeden rozd\u00edl rozhoduje o v\u0161em ostatn\u00edm: pam\u011b\u0165ov\u00e9 rel\u00e9 dr\u017e\u00ed svou posledn\u00ed kontaktn\u00ed pozici i po odstran\u011bn\u00ed \u0159\u00eddic\u00edho sign\u00e1lu, zat\u00edmco nepam\u011b\u0165ov\u00e9 rel\u00e9 se vrac\u00ed do v\u00fdchoz\u00edho stavu v okam\u017eiku, kdy zmiz\u00ed nap\u00e1jen\u00ed c\u00edvky.<\/p>\n<p>Tento jedin\u00fd rozd\u00edl v chov\u00e1n\u00ed se prom\u00edt\u00e1 do v\u0161ech ostatn\u00edch aspekt\u016f n\u00e1vrhu \u2013 spot\u0159eby energie, tepla c\u00edvky, reakce na v\u00fdpadek nap\u00e1jen\u00ed, slo\u017eitosti zapojen\u00ed, filozofie bezpe\u010dn\u00e9ho selh\u00e1n\u00ed a vhodnosti aplikace. Pochopen\u00ed toho, jak a pro\u010d se tyto dva typy rel\u00e9 li\u0161\u00ed, je nejrychlej\u0161\u00ed cesta ke spr\u00e1vn\u00e9mu v\u00fdb\u011bru. P\u0159edt\u00edm, ne\u017e se pono\u0159\u00edme do srovn\u00e1n\u00ed, je u\u017eite\u010dn\u00e9 pochopit \u0161ir\u0161\u00ed kontext <a href=\"https:\/\/test.viox.com\/cs\/contactors-vs-relays-understanding-the-key-differences\/\">styka\u010de vs. rel\u00e9<\/a> v sp\u00ednac\u00edch aplikac\u00edch.<\/p>\n<p><strong>Zkr\u00e1tka:<\/strong><\/p>\n<ul>\n<li>Vyberte si <strong>pam\u011b\u0165ov\u00fdm rel\u00e9<\/strong> (bistabiln\u00ed rel\u00e9), kdy\u017e obvod mus\u00ed <strong>pamatovat si sv\u016fj posledn\u00ed stav bez trval\u00e9ho nap\u00e1jen\u00ed c\u00edvky<\/strong>.<\/li>\n<li>Vyberte si <strong>nepam\u011b\u0165ov\u00fdm rel\u00e9<\/strong> (monostabiln\u00ed rel\u00e9), kdy\u017e se obvod mus\u00ed <strong>vr\u00e1tit do definovan\u00e9ho v\u00fdchoz\u00edho stavu p\u0159i ztr\u00e1t\u011b nap\u00e1jen\u00ed<\/strong>.<\/li>\n<\/ul>\n<figure style=\"text-align: center; margin: 24px 0;\">\n        <img decoding=\"async\" src=\"https:\/\/img.viox.com\/Side-by-side-comparison-diagram-showing-latching-relay-maintaining-contact-position-after-coil-power-removal-versus-non-latching-relay-returning-to-default-state.webp\" alt=\"Side-by-side comparison diagram showing latching relay maintaining contact position after coil power removal versus non-latching relay returning to default state\" style=\"max-width: 100%; height: auto;\"><figcaption><i>Obr\u00e1zek 1: Hlavn\u00ed provozn\u00ed rozd\u00edl \u2013 pam\u011b\u0165ov\u00e9 rel\u00e9 udr\u017euje sv\u016fj stav s nulovou spot\u0159ebou energie, zat\u00edmco nepam\u011b\u0165ov\u00e9 rel\u00e9 se okam\u017eit\u011b vrac\u00ed do v\u00fdchoz\u00ed polohy.<\/i><\/figcaption><\/figure>\n<h2>Kl\u00ed\u010dov\u00e9 poznatky<\/h2>\n<ul>\n<li>A <strong>pam\u011b\u0165ov\u00fdm rel\u00e9<\/strong> z\u016fst\u00e1v\u00e1 ve sv\u00e9 posledn\u00ed sp\u00ednan\u00e9 pozici i po skon\u010den\u00ed pulzu c\u00edvky \u2013 nen\u00ed pot\u0159eba \u017e\u00e1dn\u00e9 udr\u017eovac\u00ed nap\u00e1jen\u00ed.<\/li>\n<li>A <strong>nepam\u011b\u0165ov\u00fdm rel\u00e9<\/strong> vy\u017eaduje trval\u00e9 nap\u00e1jen\u00ed c\u00edvky, aby z\u016fstalo ve sv\u00e9m aktivovan\u00e9m stavu.<\/li>\n<li>Pam\u011b\u0165ov\u00e1 rel\u00e9 vynikaj\u00ed v <strong>n\u00edzkoenergetick\u00fdch, na baterie citliv\u00fdch, d\u00e1lkov\u011b ovl\u00e1dan\u00fdch a pam\u011b\u0165ov\u00fdch aplikac\u00edch<\/strong>.<\/li>\n<li>Nepam\u011b\u0165ov\u00e1 rel\u00e9 vynikaj\u00ed v <strong>jednoduch\u00e9 \u0159\u00eddic\u00ed logice, chov\u00e1n\u00ed bezpe\u010dn\u00e9ho n\u00e1vratu a konven\u010dn\u00edch pr\u016fmyslov\u00fdch panelech<\/strong>.<\/li>\n<li>Spr\u00e1vn\u00e1 volba z\u00e1vis\u00ed na <strong>energetick\u00e9m rozpo\u010dtu, tepeln\u00fdch omezen\u00edch, chov\u00e1n\u00ed p\u0159i resetu, \u0159\u00eddic\u00ed architektu\u0159e a po\u017eadovan\u00e9 reakci na ztr\u00e1tu nap\u00e1jen\u00ed<\/strong>.<\/li>\n<\/ul>\n<h2>Pam\u011b\u0165ov\u00e9 rel\u00e9 vs. nepam\u011b\u0165ov\u00e9 rel\u00e9: Rychl\u00e1 srovn\u00e1vac\u00ed tabulka<\/h2>\n<table border=\"1\" style=\"border-collapse: collapse; width: 100%; text-align: left;\">\n<thead>\n<tr>\n<th style=\"padding: 8px;\">Faktor v\u00fdb\u011bru<\/th>\n<th style=\"padding: 8px;\">Pam\u011b\u0165ov\u00e9 rel\u00e9<\/th>\n<th style=\"padding: 8px;\">Nepam\u011b\u0165ov\u00e9 rel\u00e9<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding: 8px;\"><strong>Tak\u00e9 naz\u00fdvan\u00e9<\/strong><\/td>\n<td style=\"padding: 8px;\">Bistabiln\u00ed rel\u00e9, rel\u00e9 s aretac\u00ed, impulsn\u00ed rel\u00e9<\/td>\n<td style=\"padding: 8px;\">Monostabiln\u00ed rel\u00e9, standardn\u00ed rel\u00e9<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\"><strong>Stav po odstran\u011bn\u00ed \u0159\u00eddic\u00edho nap\u00e1jen\u00ed<\/strong><\/td>\n<td style=\"padding: 8px;\">Z\u016fst\u00e1v\u00e1 v posledn\u00ed sp\u00ednan\u00e9 pozici<\/td>\n<td style=\"padding: 8px;\">Vrac\u00ed se do v\u00fdchoz\u00ed (odpojen\u00e9) polohy<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\"><strong>Po\u017eadavek na nap\u00e1jen\u00ed c\u00edvky<\/strong><\/td>\n<td style=\"padding: 8px;\">Kr\u00e1tk\u00fd pulz pro nastaven\u00ed nebo reset; nulov\u00e1 udr\u017eovac\u00ed energie<\/td>\n<td style=\"padding: 8px;\">Trval\u00e9 nap\u00e1jen\u00ed po celou dobu aktivace<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\"><strong>Generov\u00e1n\u00ed tepla<\/strong><\/td>\n<td style=\"padding: 8px;\">N\u00edzk\u00e1 \u2013 c\u00edvka je mezi sp\u00ednac\u00edmi ud\u00e1lostmi vypnut\u00e1<\/td>\n<td style=\"padding: 8px;\">Vy\u0161\u0161\u00ed \u2013 c\u00edvka trvale rozptyluje teplo, kdy\u017e je pod nap\u011bt\u00edm<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\"><strong>\u0158\u00edzen\u00ed slo\u017eitosti<\/strong><\/td>\n<td style=\"padding: 8px;\">Vy\u0161\u0161\u00ed \u2013 je pot\u0159eba logika pulzu nastaven\u00ed\/resetu nebo zm\u011bna polarity<\/td>\n<td style=\"padding: 8px;\">Ni\u017e\u0161\u00ed \u2013 jednoduch\u00e9 pou\u017eit\u00ed nap\u011bt\u00ed zapnuto\/vypnuto<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\"><strong>Mechanick\u00e1 \u017eivotnost<\/strong><\/td>\n<td style=\"padding: 8px;\">Obvykle krat\u0161\u00ed kv\u016fli opot\u0159eben\u00ed areta\u010dn\u00edho mechanismu<\/td>\n<td style=\"padding: 8px;\">Obvykle del\u0161\u00ed u standardn\u00edch proveden\u00ed<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\"><strong>Chov\u00e1n\u00ed p\u0159i ztr\u00e1t\u011b nap\u00e1jen\u00ed<\/strong><\/td>\n<td style=\"padding: 8px;\">Zachov\u00e1v\u00e1 posledn\u00ed stav (pam\u011b\u0165)<\/td>\n<td style=\"padding: 8px;\">Vrac\u00ed se do v\u00fdchoz\u00edho stavu (automatick\u00fd reset)<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\"><strong>Nejlep\u0161\u00ed volba<\/strong><\/td>\n<td style=\"padding: 8px;\">Energeticky \u00fasporn\u00e9, bateriov\u00e9 syst\u00e9my, inteligentn\u00ed m\u011b\u0159en\u00ed, automatizace budov, d\u00e1lkov\u00e9 sp\u00edn\u00e1n\u00ed<\/td>\n<td style=\"padding: 8px;\">Pr\u016fmyslov\u00e9 \u0159\u00eddic\u00ed panely, vkl\u00e1dac\u00ed obvody, alarmov\u00e1 logika, pomocn\u00e9 obvody \u0159\u00edzen\u00ed motor\u016f<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\"><strong>Typick\u00e1 cena<\/strong><\/td>\n<td style=\"padding: 8px;\">M\u00edrn\u011b vy\u0161\u0161\u00ed na jednotku<\/td>\n<td style=\"padding: 8px;\">Obecn\u011b ni\u017e\u0161\u00ed na jednotku<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Co je to pam\u011b\u0165ov\u00e9 rel\u00e9?<\/h2>\n<p>A <strong>pam\u011b\u0165ov\u00fdm rel\u00e9<\/strong> je elektromechanick\u00fd sp\u00edna\u010d, kter\u00fd z\u016fst\u00e1v\u00e1 ve sv\u00e9 posledn\u00ed sp\u00ednan\u00e9 pozici i po \u00fapln\u00e9m odpojen\u00ed nap\u00e1jen\u00ed c\u00edvky. Jakmile \u0159\u00eddic\u00ed pulz p\u0159esune kontakty do nov\u00e9 polohy, z\u016fstanou tam \u2013 trvale \u2013 dokud je druh\u00fd pulz v\u00fdslovn\u011b nep\u0159\u00edk\u00e1\u017ee, aby se vr\u00e1tily zp\u011bt.<\/p>\n<p>Tato \u201cpozi\u010dn\u00ed pam\u011b\u0165\u201d je definuj\u00edc\u00ed charakteristikou. Proto\u017ee rel\u00e9 nepot\u0159ebuje trval\u00fd proud k udr\u017een\u00ed sv\u00fdch kontakt\u016f, funguje jako <strong>bistabiln\u00ed za\u0159\u00edzen\u00ed<\/strong> se dv\u011bma stejn\u011b stabiln\u00edmi klidov\u00fdmi stavy: nastaveno a resetov\u00e1no.<\/p>\n<h3>Jak funguje pam\u011b\u0165ov\u00e9 rel\u00e9<\/h3>\n<p>Princip fungov\u00e1n\u00ed se m\u00edrn\u011b li\u0161\u00ed mezi jedno-c\u00edvkov\u00fdmi a dvou-c\u00edvkov\u00fdmi proveden\u00edmi, ale z\u00e1kladn\u00ed koncept je stejn\u00fd: <strong>permanentn\u00ed magnet nebo mechanick\u00e1 z\u00e1padka<\/strong> dr\u017e\u00ed armaturu v poloze po skon\u010den\u00ed pulzu c\u00edvky.<\/p>\n<ol>\n<li><strong>Aplikov\u00e1n pulz<\/strong> \u2013 Proud prot\u00e9k\u00e1 c\u00edvkou a generuje magnetick\u00e9 pole dostate\u010dn\u011b siln\u00e9, aby p\u0159ekonalo udr\u017eovac\u00ed s\u00edlu st\u00e1vaj\u00edc\u00edho stavu a posunulo armaturu.<\/li>\n<li><strong>Kontakty se p\u0159epnou<\/strong> \u2013 Armatura se pohybuje, otev\u00edr\u00e1 nebo zav\u00edr\u00e1 sadu kontakt\u016f.<\/li>\n<li><strong>Pulz odstran\u011bn<\/strong> \u2013 C\u00edvka se odpoj\u00ed, ale permanentn\u00ed magnet (u polarizovan\u00fdch proveden\u00ed) nebo mechanick\u00e1 z\u00e1padka (u mechanicky aretovan\u00fdch proveden\u00ed) dr\u017e\u00ed armaturu uzam\u010denou v nov\u00e9 poloze.<\/li>\n<li><strong>Stav dr\u017een p\u0159i nulov\u00e9 spot\u0159eb\u011b energie<\/strong> \u2013 Rel\u00e9 z\u016fst\u00e1v\u00e1 v t\u00e9to poloze bez jak\u00e9koli spot\u0159eby energie.<\/li>\n<li><strong>Aplikov\u00e1n opa\u010dn\u00fd pulz<\/strong> \u2014 Impulz s opa\u010dnou polaritou (jednoc\u00edvkov\u00fd) nebo impuls na druh\u00e9 c\u00edvce (dvouc\u00edvkov\u00fd) uvoln\u00ed z\u00e1padku a posune kotvu zp\u011bt.<\/li>\n<\/ol>\n<p>Proto se rel\u00e9 s aretac\u00ed tak\u00e9 naz\u00fdv\u00e1 <strong>bistabiln\u00ed rel\u00e9<\/strong>, a <strong>pam\u011b\u0165ov\u00e9 rel\u00e9<\/strong>, nebo <strong>impulsn\u00ed rel\u00e9<\/strong>. M\u00e1 dv\u011b stabiln\u00ed polohy a p\u0159ep\u00edn\u00e1 mezi nimi pouze tehdy, kdy\u017e obdr\u017e\u00ed explicitn\u00ed p\u0159\u00edkaz.<\/p>\n<h3>Typy rel\u00e9 s aretac\u00ed: Jednoc\u00edvkov\u00e9 vs. Dvouc\u00edvkov\u00e9<\/h3>\n<p>Ne v\u0161echna rel\u00e9 s aretac\u00ed pou\u017e\u00edvaj\u00ed stejnou metodu ovl\u00e1d\u00e1n\u00ed. Dv\u011b nejb\u011b\u017en\u011bj\u0161\u00ed architektury jsou jednoc\u00edvkov\u00e9 a dvouc\u00edvkov\u00e9 proveden\u00ed, kter\u00e9 se v\u00fdznamn\u011b li\u0161\u00ed v zapojen\u00ed a \u0159\u00eddic\u00ed logice.<\/p>\n<figure style=\"text-align: center; margin: 24px 0;\">\n        <img decoding=\"async\" src=\"https:\/\/img.viox.com\/Structural-comparison-of-single-coil-latching-relay-with-polarity-reversal-versus-two-coil-latching-relay-with-separate-set-and-reset-coils.webp\" alt=\"Structural comparison of single-coil latching relay with polarity reversal versus two-coil latching relay with separate set and reset coils\" style=\"max-width: 100%; height: auto;\"><figcaption><i>Obr\u00e1zek 2: Struktur\u00e1ln\u00ed rozd\u00edly mezi jednoc\u00edvkov\u00fdm proveden\u00edm vy\u017eaduj\u00edc\u00edm zm\u011bnu polarity a dvouc\u00edvkov\u00fdm proveden\u00edm se samostatn\u00fdmi vstupy pro nastaven\u00ed a reset.<\/i><\/figcaption><\/figure>\n<h4>Jednoc\u00edvkov\u00e9 rel\u00e9 s aretac\u00ed<\/h4>\n<p>A <strong>jednoc\u00edvkov\u00e9 rel\u00e9 s aretac\u00ed<\/strong> pou\u017e\u00edv\u00e1 jednu c\u00edvku pro operace nastaven\u00ed i resetov\u00e1n\u00ed. Sm\u011br proudu c\u00edvkou ur\u010duje, do kter\u00e9ho stavu se rel\u00e9 p\u0159epne.<\/p>\n<ul>\n<li><strong>Pro nastaven\u00ed:<\/strong> Aplikujte impuls s kladnou polaritou na c\u00edvku.<\/li>\n<li><strong>Pro resetov\u00e1n\u00ed:<\/strong> Aplikujte impuls s opa\u010dnou polaritou na stejnou c\u00edvku.<\/li>\n<\/ul>\n<p>Toto proveden\u00ed pou\u017e\u00edv\u00e1 m\u00e9n\u011b pin\u016f a m\u00e9n\u011b m\u00edsta na desce, d\u00edky \u010demu\u017e je obl\u00edben\u00e9 v kompaktn\u00edch rozvr\u017een\u00edch PCB a spot\u0159ebn\u00ed elektronice. \u0158\u00eddic\u00ed obvod v\u0161ak mus\u00ed b\u00fdt schopen obr\u00e1tit polaritu c\u00edvky \u2013 co\u017e typicky vy\u017eaduje budi\u010d H-m\u016fstku nebo v\u00fdstupn\u00ed stupe\u0148 mikrokontrol\u00e9ru se schopnost\u00ed p\u0159ep\u00edn\u00e1n\u00ed polarity.<\/p>\n<h4>Dvouc\u00edvkov\u00e9 rel\u00e9 s aretac\u00ed<\/h4>\n<p>A <strong>dvouc\u00edvkov\u00e9 rel\u00e9 s aretac\u00ed<\/strong> m\u00e1 dv\u011b fyzicky odd\u011blen\u00e9 c\u00edvky: jednu vyhrazenou pro nastaven\u00ed kontakt\u016f a jednu vyhrazenou pro jejich resetov\u00e1n\u00ed.<\/p>\n<ul>\n<li><strong>Pro nastaven\u00ed:<\/strong> Aplikujte impuls na nastavovac\u00ed c\u00edvku.<\/li>\n<li><strong>Pro resetov\u00e1n\u00ed:<\/strong> Aplikujte impuls na resetovac\u00ed c\u00edvku.<\/li>\n<\/ul>\n<p>Tento p\u0159\u00edstup zjednodu\u0161uje budic\u00ed obvod, proto\u017ee nen\u00ed nutn\u00e1 \u017e\u00e1dn\u00e1 zm\u011bna polarity \u2013 ka\u017ed\u00e1 c\u00edvka p\u0159ij\u00edm\u00e1 proud pouze v jednom sm\u011bru. V syst\u00e9mech \u0159\u00edzen\u00fdch PLC a v pr\u016fmyslov\u00fdch panelov\u00fdch proveden\u00edch se dvouc\u00edvkov\u00e1 rel\u00e9 s aretac\u00ed \u010dasto snadn\u011bji integruj\u00ed, proto\u017ee ka\u017ed\u00e1 c\u00edvka m\u016f\u017ee b\u00fdt buzen\u00e1 samostatn\u00fdm diskr\u00e9tn\u00edm v\u00fdstupem.<\/p>\n<h4>Jak\u00e9 rel\u00e9 s aretac\u00ed byste si m\u011bli vybrat?<\/h4>\n<table border=\"1\" style=\"border-collapse: collapse; width: 100%; text-align: left;\">\n<thead>\n<tr>\n<th style=\"padding: 8px;\">Faktor n\u00e1vrhu<\/th>\n<th style=\"padding: 8px;\">Jednoc\u00edvkov\u00e9 rel\u00e9 s aretac\u00ed<\/th>\n<th style=\"padding: 8px;\">Dvouc\u00edvkov\u00e9 rel\u00e9 s aretac\u00ed<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding: 8px;\">Po\u010det pin\u016f<\/td>\n<td style=\"padding: 8px;\">M\u00e9n\u011b (2 piny c\u00edvky)<\/td>\n<td style=\"padding: 8px;\">V\u00edce (4 piny c\u00edvky)<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\">Budic\u00ed obvod<\/td>\n<td style=\"padding: 8px;\">Vy\u017eaduje zm\u011bnu polarity (H-m\u016fstek)<\/td>\n<td style=\"padding: 8px;\">Jednodu\u0161\u0161\u00ed \u2013 jeden sm\u011br na c\u00edvku<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\">M\u00edsto na PCB<\/td>\n<td style=\"padding: 8px;\">Men\u0161\u00ed p\u016fdorys<\/td>\n<td style=\"padding: 8px;\">M\u00edrn\u011b v\u011bt\u0161\u00ed<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\">Integrace s PLC<\/td>\n<td style=\"padding: 8px;\">Slo\u017eit\u011bj\u0161\u00ed mapov\u00e1n\u00ed v\u00fdstup\u016f<\/td>\n<td style=\"padding: 8px;\">Snadn\u011bj\u0161\u00ed \u2013 jeden v\u00fdstup na c\u00edvku<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\">N\u00e1klady<\/td>\n<td style=\"padding: 8px;\">Obvykle ni\u017e\u0161\u00ed<\/td>\n<td style=\"padding: 8px;\">Obvykle m\u00edrn\u011b vy\u0161\u0161\u00ed<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Spr\u00e1vn\u00e9 <a href=\"https:\/\/test.viox.com\/cs\/coil-suppression-techniques-diode-vs-zener-rc-snubber\/\">techniky potla\u010den\u00ed c\u00edvky<\/a> jsou nezbytn\u00e9 pro ochranu budic\u00edch obvod\u016f p\u0159ed induktivn\u00edm zp\u011btn\u00fdm r\u00e1zem, bez ohledu na to, jak\u00e9 rel\u00e9 s aretac\u00ed si vyberete.<\/p>\n<h3>Pro\u010d si in\u017een\u00fd\u0159i vyb\u00edraj\u00ed rel\u00e9 s aretac\u00ed<\/h3>\n<p>Prim\u00e1rn\u00ed motivac\u00ed je t\u00e9m\u011b\u0159 v\u017edy <strong>sn\u00ed\u017een\u00e1 spot\u0159eba energie<\/strong>. Proto\u017ee c\u00edvka odeb\u00edr\u00e1 energii pouze b\u011bhem kr\u00e1tk\u00e9ho sp\u00ednac\u00edho impulsu \u2013 typicky 10 a\u017e 100 milisekund \u2013 dlouhodob\u00e1 spot\u0159eba energie se bl\u00ed\u017e\u00ed nule, zat\u00edmco rel\u00e9 dr\u017e\u00ed sv\u016fj stav.<\/p>\n<p>Krom\u011b \u00faspory energie nab\u00edzej\u00ed rel\u00e9 s aretac\u00ed:<\/p>\n<ul>\n<li><strong>Sn\u00ed\u017een\u00e9 zah\u0159\u00edv\u00e1n\u00ed c\u00edvky<\/strong> \u2014 \u017d\u00e1dn\u00fd trval\u00fd proud znamen\u00e1 \u017e\u00e1dn\u00fd trval\u00fd odvod tepla, co\u017e je d\u016fle\u017eit\u00e9 v uzav\u0159en\u00fdch sk\u0159\u00edn\u00edch a rozvr\u017een\u00edch s vysokou hustotou.<\/li>\n<li><strong>Zachov\u00e1n\u00ed stavu p\u0159i v\u00fdpadku nap\u00e1jen\u00ed<\/strong> \u2014 Posledn\u00ed poloha kontaktu je zachov\u00e1na i p\u0159i \u00fapln\u00e9 ztr\u00e1t\u011b \u0159\u00eddic\u00edho nap\u00e1jen\u00ed, co\u017e je kritick\u00e9 v aplikac\u00edch m\u011b\u0159en\u00ed a bezpe\u010dnostn\u00edho blokov\u00e1n\u00ed.<\/li>\n<li><strong>Ni\u017e\u0161\u00ed n\u00e1roky na nap\u00e1jec\u00ed zdroj<\/strong> \u2014 Bateriov\u00e9 a sol\u00e1rn\u00ed syst\u00e9my v\u00fdznamn\u011b t\u011b\u017e\u00ed z eliminace trval\u00e9ho proudu c\u00edvky.<\/li>\n<\/ul>\n<p>Typick\u00e9 aplikace rel\u00e9 s aretac\u00ed zahrnuj\u00ed:<\/p>\n<ul>\n<li>Chytr\u00e9 m\u011b\u0159en\u00ed elekt\u0159iny, plynu a vody<\/li>\n<li>Syst\u00e9my \u0159\u00edzen\u00ed osv\u011btlen\u00ed a stm\u00edv\u00e1n\u00ed<\/li>\n<li>Automatizace budov (\u0159\u00edzen\u00ed ventil\u016f HVAC, motorizovan\u00e9 \u017ealuzie)<\/li>\n<li>Vzd\u00e1len\u00e9 sp\u00edn\u00e1n\u00ed nap\u00e1jen\u00ed v telekomunika\u010dn\u00ed a infrastrukturn\u00ed s\u00edti<\/li>\n<li>Bateriov\u00e1 za\u0159\u00edzen\u00ed nebo za\u0159\u00edzen\u00ed vyu\u017e\u00edvaj\u00edc\u00ed energii z okol\u00ed<\/li>\n<li>Dve\u0159n\u00ed z\u00e1mky bezpe\u010dnostn\u00edch syst\u00e9m\u016f a \u0159\u00edzen\u00ed p\u0159\u00edstupu<\/li>\n<li>L\u00e9ka\u0159sk\u00e9 p\u0159\u00edstroje, kde je vy\u017eadov\u00e1no zachov\u00e1n\u00ed stavu b\u011bhem v\u00fdm\u011bny baterie<\/li>\n<\/ul>\n<p>Pro aplikace vy\u017eaduj\u00edc\u00ed \u010dasovan\u00e9 sp\u00ednac\u00ed operace krom\u011b zachov\u00e1n\u00ed stavu zva\u017ete prozkoum\u00e1n\u00ed <a href=\"https:\/\/test.viox.com\/cs\/full-guide-to-time-delay-relay\/\">\u010dasov\u00e1 rel\u00e9<\/a> , kter\u00e9 mohou dopl\u0148ovat funk\u010dnost rel\u00e9 s aretac\u00ed.<\/p>\n<h2>Co je rel\u00e9 bez aretace?<\/h2>\n<p>A <strong>nepam\u011b\u0165ov\u00fdm rel\u00e9<\/strong> je elektromechanick\u00fd sp\u00edna\u010d, kter\u00fd m\u011bn\u00ed stav pouze tehdy, kdy\u017e je jeho c\u00edvka nap\u00e1jena. V okam\u017eiku, kdy je nap\u00e1jen\u00ed c\u00edvky odpojeno, vratn\u00e1 pru\u017eina tla\u010d\u00ed kotvu zp\u011bt do v\u00fdchoz\u00ed (nenap\u00e1jen\u00e9) polohy.<\/p>\n<p>To znamen\u00e1, \u017ee rel\u00e9 bez aretace m\u00e1 pouze <strong>jeden stabiln\u00ed stav<\/strong> \u2014 jeho polohu s vratnou pru\u017einou. Nap\u00e1jen\u00fd stav je udr\u017eov\u00e1n v\u00fdhradn\u011b nep\u0159etr\u017eit\u00fdm proudem prot\u00e9kaj\u00edc\u00edm c\u00edvkou. Odpojte proud a kontakty se v\u017edy vr\u00e1t\u00ed do stejn\u00e9 zn\u00e1m\u00e9 polohy.<\/p>\n<p>Toto chov\u00e1n\u00ed s jedn\u00edm stabiln\u00edm stavem je d\u016fvod, pro\u010d se rel\u00e9 bez aretace tak\u00e9 naz\u00fdvaj\u00ed <strong>monostabiln\u00ed rel\u00e9<\/strong>.<\/p>\n<h3>Jak funguje rel\u00e9 bez aretace<\/h3>\n<p>Princip fungov\u00e1n\u00ed je jednoduch\u00fd:<\/p>\n<ol>\n<li><strong>C\u00edvka je nap\u00e1jena<\/strong> \u2014 P\u0159iveden\u00ed nap\u011bt\u00ed na c\u00edvku generuje magnetick\u00e9 pole, kter\u00e9 p\u0159itahuje kotvu a p\u0159esouv\u00e1 kontakty z jejich norm\u00e1ln\u00ed polohy (obvykle NC \u2014 norm\u00e1ln\u011b zav\u0159en\u00e9) do jejich nap\u00e1jen\u00e9 polohy (obvykle NO \u2014 norm\u00e1ln\u011b otev\u0159en\u00e9).<\/li>\n<li><strong>Stav je udr\u017eov\u00e1n nep\u0159etr\u017eit\u00fdm nap\u00e1jen\u00edm<\/strong> \u2014 Dokud je udr\u017eov\u00e1no nap\u011bt\u00ed c\u00edvky, magnetick\u00e1 s\u00edla dr\u017e\u00ed kotvu proti s\u00edle pru\u017einy a udr\u017euje kontakty v nap\u00e1jen\u00e9 poloze.<\/li>\n<li><strong>C\u00edvka je odpojena<\/strong> \u2014 Kdy\u017e je nap\u011bt\u00ed c\u00edvky odpojeno, magnetick\u00e9 pole se zhrout\u00ed a vratn\u00e1 pru\u017eina tla\u010d\u00ed kotvu zp\u011bt do klidov\u00e9 polohy.<\/li>\n<li><strong>Kontakty se vr\u00e1t\u00ed do v\u00fdchoz\u00edho stavu<\/strong> \u2014 Rel\u00e9 je nyn\u00ed zp\u011bt ve sv\u00e9m norm\u00e1ln\u00edm stavu, p\u0159esn\u011b tam, kde za\u010dalo.<\/li>\n<\/ol>\n<p>Neexistuje \u017e\u00e1dn\u00e1 pam\u011b\u0165, \u017e\u00e1dn\u00e1 aretace a \u017e\u00e1dn\u00e1 nejednozna\u010dnost. Poloha rel\u00e9 je v\u017edy p\u0159\u00edmou funkc\u00ed toho, zda je c\u00edvka nap\u00e1jena nebo ne.<\/p>\n<h3>Pro\u010d si in\u017een\u00fd\u0159i vyb\u00edraj\u00ed rel\u00e9 bez aretace<\/h3>\n<p>Rel\u00e9 bez aretace z\u016fst\u00e1vaj\u00ed nejroz\u0161\u00ed\u0159en\u011bj\u0161\u00edm typem rel\u00e9 v pr\u016fmyslov\u00fdch, komer\u010dn\u00edch a spot\u0159ebitelsk\u00fdch aplikac\u00edch z n\u011bkolika praktick\u00fdch d\u016fvod\u016f:<\/p>\n<ul>\n<li><strong>Jednoduch\u00e1 \u0159\u00eddic\u00ed logika<\/strong> \u2014 Jeden sign\u00e1l, jeden stav. P\u0159ive\u010fte nap\u011bt\u00ed pro nap\u00e1jen\u00ed; odpojte nap\u011bt\u00ed pro odpojen\u00ed. \u017d\u00e1dn\u00e9 \u010dasov\u00e1n\u00ed pulz\u016f, \u017e\u00e1dn\u00e1 spr\u00e1va polarity, \u017e\u00e1dn\u00e9 sekvence nastaven\u00ed\/resetov\u00e1n\u00ed.<\/li>\n<li><strong>P\u0159edv\u00eddateln\u00e9 v\u00fdchoz\u00ed chov\u00e1n\u00ed<\/strong> \u2014 P\u0159i ztr\u00e1t\u011b nap\u00e1jen\u00ed se rel\u00e9 v\u017edy vr\u00e1t\u00ed do stejn\u00e9ho zn\u00e1m\u00e9ho stavu. Tato inherentn\u00ed charakteristika bezpe\u010dn\u00e9ho selh\u00e1n\u00ed je nezbytn\u00e1 v mnoha bezpe\u010dnostn\u011b kritick\u00fdch aplikac\u00edch.<\/li>\n<li><strong>Jednoduch\u00e9 zapojen\u00ed<\/strong> \u2014 Rel\u00e9 bez aretace se integruje p\u0159\u00edmo se standardn\u00edmi v\u00fdstupy PLC, kontakty \u010dasova\u010d\u016f, tla\u010d\u00edtkov\u00fdmi stanicemi a \u017eeb\u0159\u00edkovou logikou bez speci\u00e1ln\u00edch budic\u00edch obvod\u016f.<\/li>\n<li><strong>Ni\u017e\u0161\u00ed n\u00e1klady a \u0161ir\u0161\u00ed dostupnost<\/strong> \u2014 Rel\u00e9 bez aretace se vyr\u00e1b\u011bj\u00ed v mnohem v\u011bt\u0161\u00edch objemech, d\u00edky \u010demu\u017e jsou levn\u011bj\u0161\u00ed a dostupn\u00e9 ve v\u00edce tvarech, jmenovit\u00fdch nap\u011bt\u00edch a konfigurac\u00edch kontakt\u016f.<\/li>\n<li><strong>Del\u0161\u00ed mechanick\u00e1 \u017eivotnost<\/strong> \u2014 Bez areta\u010dn\u00edho mechanismu, kter\u00fd by se opot\u0159ebov\u00e1val, dosahuj\u00ed standardn\u00ed rel\u00e9 bez aretace \u010dasto vy\u0161\u0161\u00edho po\u010dtu cykl\u016f.<\/li>\n<\/ul>\n<p>Typick\u00e9 aplikace rel\u00e9 bez aretace zahrnuj\u00ed:<\/p>\n<ul>\n<li>Vkl\u00e1dac\u00ed rel\u00e9 v pr\u016fmyslov\u00fdch \u0159\u00eddic\u00edch panelech<\/li>\n<li>Standardn\u00ed logika \u0159\u00edzen\u00ed stroje (spou\u0161t\u011b\u010de motor\u016f, budi\u010de solenoid\u016f)<\/li>\n<li>Obvody alarm\u016f a signalizace<\/li>\n<li>Procesy \u0159\u00edzen\u00e9 \u010dasova\u010dem<\/li>\n<li>\u0158\u00edzen\u00ed kompresoru a ventil\u00e1toru HVAC<\/li>\n<li>Automobilov\u00e9 p\u0159\u00edslu\u0161enstv\u00ed (sv\u011btlomety, st\u011bra\u010de, klakson)<\/li>\n<li>Jak\u00fdkoli obvod, kde by ztr\u00e1ta \u0159\u00eddic\u00edho nap\u00e1jen\u00ed m\u011bla odpojit v\u00fdstup<\/li>\n<\/ul>\n<p>V bezpe\u010dnostn\u011b kritick\u00fdch aplikac\u00edch, jako jsou <a href=\"https:\/\/test.viox.com\/cs\/fire-alarm-relay-modules-enhancing-safety-and-efficiency-in-fire-detection-systems\/\">syst\u00e9my po\u017e\u00e1rn\u00edho poplachu<\/a>, rel\u00e9 bez aretace poskytuj\u00ed z\u00e1kladn\u00ed chov\u00e1n\u00ed bezpe\u010dn\u00e9ho selh\u00e1n\u00ed automatick\u00fdm n\u00e1vratem do v\u00fdchoz\u00edho stavu p\u0159i ztr\u00e1t\u011b \u0159\u00eddic\u00edho nap\u00e1jen\u00ed.<\/p>\n<h2>Kl\u00ed\u010dov\u00e9 rozd\u00edly, kter\u00e9 skute\u010dn\u011b ovliv\u0148uj\u00ed v\u00fdb\u011br rel\u00e9<\/h2>\n<h3>1. Zachov\u00e1n\u00ed stavu po ztr\u00e1t\u011b nap\u00e1jen\u00ed<\/h3>\n<p>Toto je nejz\u00e1sadn\u011bj\u0161\u00ed rozd\u00edl a m\u011bla by to b\u00fdt prvn\u00ed ot\u00e1zka v jak\u00e9mkoli v\u00fdb\u011brov\u00e9m procesu.<\/p>\n<p>A <strong>pam\u011b\u0165ov\u00fdm rel\u00e9<\/strong> si zachov\u00e1v\u00e1 svou posledn\u00ed polohu kontaktu i po p\u0159eru\u0161en\u00ed nap\u00e1jen\u00ed. Kdy\u017e se \u0159\u00eddic\u00ed nap\u00e1jen\u00ed obnov\u00ed, kontakty jsou st\u00e1le v poloze, ve kter\u00e9 byly p\u0159ed v\u00fdpadkem. D\u00edky tomu jsou areta\u010dn\u00ed rel\u00e9 p\u0159irozenou volbou pro aplikace, kter\u00e9 vy\u017eaduj\u00ed <strong>energeticky nez\u00e1vislou pam\u011b\u0165 stavu<\/strong> \u2014 nap\u0159\u00edklad chytr\u00e9 elektrom\u011bry, kter\u00e9 mus\u00ed udr\u017eovat odpojovac\u00ed sp\u00edna\u010d otev\u0159en\u00fd b\u011bhem v\u00fdpadk\u016f, nebo sv\u011bteln\u00e9 sc\u00e9ny, kter\u00e9 by m\u011bly p\u0159etrvat i p\u0159i kr\u00e1tkodob\u00e9m blik\u00e1n\u00ed nap\u00e1jen\u00ed.<\/p>\n<p>A <strong>nepam\u011b\u0165ov\u00fdm rel\u00e9<\/strong> okam\u017eit\u011b odpadne, kdy\u017e \u0159\u00eddic\u00ed nap\u00e1jen\u00ed zmiz\u00ed. Ka\u017ed\u00fd cyklus nap\u00e1jen\u00ed za\u010d\u00edn\u00e1 ze stejn\u00e9ho zn\u00e1m\u00e9ho v\u00fdchoz\u00edho stavu. To je \u017e\u00e1douc\u00ed v obvodech \u0159\u00edzen\u00ed motor\u016f, syst\u00e9mech nouzov\u00e9ho vypnut\u00ed a v jak\u00e9koli aplikaci, kde by nekontrolovan\u00fd nebo nezn\u00e1m\u00fd stav po obnoven\u00ed nap\u00e1jen\u00ed mohl zp\u016fsobit nebezpe\u010d\u00ed.<\/p>\n<p><strong>Pravidlo rozhodov\u00e1n\u00ed:<\/strong> Pokud je odpov\u011b\u010f na ot\u00e1zku \u201cCo by se m\u011blo st\u00e1t s v\u00fdstupem p\u0159i ztr\u00e1t\u011b \u0159\u00eddic\u00edho nap\u00e1jen\u00ed?\u201d \u201cz\u016fstat tam, kde je\u201d, p\u0159iklo\u0148te se k areta\u010dn\u00edmu rel\u00e9. Pokud je odpov\u011b\u010f \u201cvr\u00e1tit se do bezpe\u010dn\u00e9ho v\u00fdchoz\u00edho stavu\u201d, p\u0159iklo\u0148te se k rel\u00e9 bez aretace.<\/p>\n<h3>2. Spot\u0159eba energie a energetick\u00e1 \u00fa\u010dinnost<\/h3>\n<p>Tento rozd\u00edl se st\u00e1v\u00e1 v\u00fdznamn\u00fdm v aplikac\u00edch s dlouh\u00fdmi dobami dr\u017een\u00ed nebo omezen\u00fdmi rozpo\u010dty energie.<\/p>\n<p>A <strong>pam\u011b\u0165ov\u00fdm rel\u00e9<\/strong> spot\u0159ebov\u00e1v\u00e1 energii c\u00edvky pouze b\u011bhem sp\u00ednac\u00edho pulzu. U typick\u00e9ho 5V areta\u010dn\u00edho rel\u00e9 m\u016f\u017ee pulz trvat 20\u201350 ms a odeb\u00edrat 150\u2013200 mA \u2014 celkov\u00e1 spot\u0159eba energie je zhruba 15\u201350 mJ na sp\u00ednac\u00ed ud\u00e1lost. Mezi ud\u00e1lostmi je spot\u0159eba energie c\u00edvky p\u0159esn\u011b nulov\u00e1.<\/p>\n<p>A <strong>nepam\u011b\u0165ov\u00fdm rel\u00e9<\/strong> spot\u0159ebov\u00e1v\u00e1 energii c\u00edvky nep\u0159etr\u017eit\u011b po celou dobu, kdy je udr\u017eov\u00e1no v nap\u00e1jen\u00e9m stavu. Typick\u00e9 5V rel\u00e9 bez aretace m\u016f\u017ee odeb\u00edrat 70\u2013150 mA nep\u0159etr\u017eit\u011b. B\u011bhem 24hodinov\u00e9 doby dr\u017een\u00ed to \u010din\u00ed zhruba 8\u201318 Wh energie \u2014 o \u0159\u00e1dy v\u00edce ne\u017e areta\u010dn\u00ed rel\u00e9 sp\u00ednaj\u00edc\u00ed jednou denn\u011b.<\/p>\n<p>U syst\u00e9m\u016f nap\u00e1jen\u00fdch z baterie, sol\u00e1rn\u00edch vzd\u00e1len\u00fdch instalac\u00ed nebo za\u0159\u00edzen\u00ed IoT vyu\u017e\u00edvaj\u00edc\u00edch energii z okol\u00ed m\u016f\u017ee b\u00fdt tento rozd\u00edl rozhoduj\u00edc\u00edm faktorem, zda syst\u00e9m spln\u00ed sv\u016fj c\u00edl provozn\u00ed \u017eivotnosti.<\/p>\n<figure style=\"text-align: center; margin: 24px 0;\">\n        <img decoding=\"async\" src=\"https:\/\/img.viox.com\/Energy-consumption-comparison-chart-showing-latching-relay-with-minimal-pulse-power-versus-non-latching-relay-with-continuous-power-draw-over-24-hour-period.webp\" alt=\"Energy consumption comparison chart showing latching relay with minimal pulse power versus non-latching relay with continuous power draw over 24 hour period\" style=\"max-width: 100%; height: auto;\"><figcaption><i>Obr\u00e1zek 3: Srovn\u00e1n\u00ed spot\u0159eby energie zd\u016fraz\u0148uj\u00edc\u00ed, jak areta\u010dn\u00ed rel\u00e9 drasticky sni\u017euj\u00ed celkov\u00fd odb\u011br energie b\u011bhem 24hodinov\u00e9ho obdob\u00ed.<\/i><\/figcaption><\/figure>\n<h3>3. Teplo c\u00edvky a tepeln\u00fd management<\/h3>\n<p>Rel\u00e9 bez aretace generuj\u00ed nep\u0159etr\u017eit\u00e9 teplo, kdykoli jsou nap\u00e1jena. V\u00fdkon rozpt\u00fdlen\u00fd v c\u00edvce \u2014 obvykle vypo\u010d\u00edtan\u00fd jako P = I^2 R nebo P = V^2 \/ R \u2014 se st\u00e1v\u00e1 tepelnou energi\u00ed, kterou je t\u0159eba \u0159\u00eddit.<\/p>\n<p>V uzav\u0159en\u00e9m krytu s omezen\u00fdm proud\u011bn\u00edm vzduchu m\u016f\u017ee n\u011bkolik nep\u0159etr\u017eit\u011b nap\u00e1jen\u00fdch rel\u00e9 bez aretace v\u00fdrazn\u011b zv\u00fd\u0161it vnit\u0159n\u00ed teplotu. To je skute\u010dn\u00fd probl\u00e9m ve venkovn\u00edch sk\u0159\u00edn\u00edch, kompaktn\u00edch sestav\u00e1ch na DIN li\u0161tu a n\u00e1vrz\u00edch PCB s vysokou hustotou.<\/p>\n<p>Areta\u010dn\u00ed rel\u00e9 tento probl\u00e9m do zna\u010dn\u00e9 m\u00edry eliminuj\u00ed. Proto\u017ee je c\u00edvka mezi sp\u00ednac\u00edmi ud\u00e1lostmi odpojena, neexistuje \u017e\u00e1dn\u00fd trval\u00fd zdroj tepla. V tepeln\u011b omezen\u00fdch konstrukc\u00edch m\u016f\u017ee tato v\u00fdhoda sama o sob\u011b ospravedlnit p\u0159echod na areta\u010dn\u00ed rel\u00e9 \u2014 i kdy\u017e spot\u0159eba energie nen\u00ed prim\u00e1rn\u00edm z\u00e1jmem.<\/p>\n<h3>4. Bezpe\u010dn\u00e9 selh\u00e1n\u00ed a bezpe\u010dnostn\u00ed aspekty<\/h3>\n<p>Toto je faktor v\u00fdb\u011bru, kde se st\u00e1vaj\u00ed nejn\u00e1kladn\u011bj\u0161\u00ed chyby.<\/p>\n<p><strong>Rel\u00e9 bez aretace jsou inherentn\u011b bezpe\u010dn\u00e9 proti selh\u00e1n\u00ed ve sm\u011bru odpadnut\u00ed.<\/strong> Pokud obvod c\u00edvky sel\u017ee (p\u0159eru\u0161en\u00fd vodi\u010d, sp\u00e1len\u00e1 pojistka, porucha \u0159\u00eddic\u00ed jednotky, v\u00fdpadek nap\u00e1jen\u00ed), rel\u00e9 se vr\u00e1t\u00ed do sv\u00e9 v\u00fdchoz\u00ed polohy s pru\u017einou. Konstrukt\u00e9\u0159i mohou obvod uspo\u0159\u00e1dat tak, aby tato v\u00fdchoz\u00ed poloha byla bezpe\u010dn\u00fdm stavem \u2014 motor zastaven, ventil uzav\u0159en, oh\u0159\u00edva\u010d vypnut, alarm aktivov\u00e1n.<\/p>\n<p><strong>Areta\u010dn\u00ed rel\u00e9 nemaj\u00ed inherentn\u00ed sm\u011br bezpe\u010dn\u00e9ho selh\u00e1n\u00ed.<\/strong> Z\u016fstanou tam, kde jsou, bez ohledu na to, co se stane s \u0159\u00eddic\u00edm syst\u00e9mem. Pokud bylo rel\u00e9 ve stavu \u201cv\u00fdstup zapnut\u201d v dob\u011b, kdy \u0159\u00eddic\u00ed jednotka selhala, z\u016fstane ve stavu \u201cv\u00fdstup zapnut\u201d. Tato perzistence m\u016f\u017ee b\u00fdt cenn\u00e1 (odpojen\u00ed chytr\u00e9ho elektrom\u011bru) nebo nebezpe\u010dn\u00e1 (oh\u0159\u00edva\u010d ponech\u00e1n zapnut\u00fd), v z\u00e1vislosti na aplikaci.<\/p>\n<p>P\u0159i v\u00fdb\u011bru z\u00e1padkov\u00e9ho rel\u00e9 pro jakoukoli aplikaci souvisej\u00edc\u00ed s bezpe\u010dnost\u00ed mus\u00ed n\u00e1vrh zahrnovat nez\u00e1visl\u00fd prost\u0159edek pro vynucen\u00ed rel\u00e9 do bezpe\u010dn\u00e9ho stavu \u2013 hl\u00eddac\u00ed \u010dasova\u010d, hardwarov\u00fd bezpe\u010dnostn\u00ed obvod nebo redundantn\u00ed vyp\u00ednac\u00ed cesta.<\/p>\n<h3>5. Metoda ovl\u00e1d\u00e1n\u00ed, zapojen\u00ed a budic\u00ed obvody<\/h3>\n<p>Nezapad\u00e1vac\u00ed rel\u00e9 vy\u017eaduj\u00ed nejjednodu\u0161\u0161\u00ed mo\u017en\u00e9 ovl\u00e1dac\u00ed rozhran\u00ed: p\u0159ipojte c\u00edvku ke sp\u00ednan\u00e9mu zdroji nap\u011bt\u00ed. Diskr\u00e9tn\u00ed v\u00fdstup PLC, tranzistor, mechanick\u00fd sp\u00edna\u010d nebo dokonce jednoduch\u00fd kontakt \u010dasova\u010de mohou p\u0159\u00edmo budit nezapad\u00e1vac\u00ed rel\u00e9. \u0158\u00eddic\u00ed logika je jeden \u0159\u00e1dek \u017eeb\u0159\u00edkov\u00e9 logiky nebo jeden GPIO pin.<\/p>\n<p>Zapad\u00e1vac\u00ed rel\u00e9 vy\u017eaduj\u00ed promy\u0161len\u011bj\u0161\u00ed n\u00e1vrh ovl\u00e1d\u00e1n\u00ed:<\/p>\n<ul>\n<li><strong>Jednoc\u00edvkov\u00e1 z\u00e1padkov\u00e1 rel\u00e9<\/strong> vy\u017eaduj\u00ed zm\u011bnu polarity. To obvykle vy\u017eaduje obvod H-m\u016fstku, uspo\u0159\u00e1d\u00e1n\u00ed p\u0159ep\u00edna\u010de DPDT nebo mikrokontrol\u00e9r s budi\u010dem s du\u00e1ln\u00edm v\u00fdstupem. Mus\u00ed b\u00fdt tak\u00e9 \u0159\u00edzena d\u00e9lka pulzu \u2013 p\u0159\u00edli\u0161 kr\u00e1tk\u00e1 m\u016f\u017ee zp\u016fsobit nespolehliv\u00e9 p\u0159ep\u00edn\u00e1n\u00ed rel\u00e9; p\u0159\u00edli\u0161 dlouh\u00e1 m\u016f\u017ee zp\u016fsobit p\u0159eh\u0159\u00e1t\u00ed c\u00edvky.<\/li>\n<li><strong>Dvouc\u00edvkov\u00e1 z\u00e1padkov\u00e1 rel\u00e9<\/strong> vy\u017eaduj\u00ed dva nez\u00e1visl\u00e9 \u0159\u00eddic\u00ed sign\u00e1ly \u2013 jeden pro nastavovac\u00ed c\u00edvku a jeden pro resetovac\u00ed c\u00edvku. V syst\u00e9mech PLC to znamen\u00e1 alokovat dva diskr\u00e9tn\u00ed v\u00fdstupy na rel\u00e9 nam\u00edsto jednoho. V n\u00e1vrz\u00edch mikrokontrol\u00e9r\u016f to znamen\u00e1 dva GPIO piny plus budic\u00ed tranzistory.<\/li>\n<\/ul>\n<p>Krom\u011b toho po zapnut\u00ed nebo inicializaci syst\u00e9mu nemus\u00ed \u0159\u00eddic\u00ed jednotka zn\u00e1t aktu\u00e1ln\u00ed stav z\u00e1padkov\u00e9ho rel\u00e9, pokud neexistuje mechanismus zp\u011btn\u00e9 vazby polohy (pomocn\u00e9 kontakty nebo sn\u00edma\u010d polohy kontaktu). Tento probl\u00e9m nejistoty stavu neexistuje u nezapad\u00e1vac\u00edch rel\u00e9, proto\u017ee jejich stav je v\u017edy zn\u00e1m z budic\u00edho sign\u00e1lu c\u00edvky.<\/p>\n<p>P\u0159i v\u00fdb\u011bru nap\u011bt\u00ed c\u00edvky pro va\u0161i aplikaci je d\u016fle\u017eit\u00e9 porozum\u011bt <a href=\"https:\/\/test.viox.com\/cs\/12v-vs-24v-dc-time-delay-relay\/\">\u00favah\u00e1m o 12V vs. 24V DC rel\u00e9<\/a> , co\u017e v\u00e1m m\u016f\u017ee pomoci optimalizovat n\u00e1vrh z hlediska energetick\u00e9 \u00fa\u010dinnosti a kompatibility \u0159\u00eddic\u00edho obvodu.<\/p>\n<h3>6. Mechanick\u00e1 \u017eivotnost a spolehlivost<\/h3>\n<p>Nezapad\u00e1vac\u00ed rel\u00e9 maj\u00ed obecn\u011b jednodu\u0161\u0161\u00ed vnit\u0159n\u00ed mechanismus \u2013 c\u00edvku, kotvu, pru\u017einu a kontakty. S men\u0161\u00edm po\u010dtem pohybliv\u00fdch \u010d\u00e1st\u00ed a bez permanentn\u00edch magnet\u016f nebo mechanick\u00fdch z\u00e1pad\u016f maj\u00ed tendenci dosahovat vy\u0161\u0161\u00edho hodnocen\u00ed mechanick\u00e9 \u017eivotnosti. Typick\u00e9 specifikace nezapad\u00e1vac\u00edch rel\u00e9 se pohybuj\u00ed od 10 milion\u016f do 100 milion\u016f mechanick\u00fdch operac\u00ed.<\/p>\n<p>Zapad\u00e1vac\u00ed rel\u00e9 obsahuj\u00ed dal\u0161\u00ed komponenty \u2013 permanentn\u00ed magnety (v polarizovan\u00fdch proveden\u00edch) nebo mechanick\u00e9 z\u00e1padkov\u00e9 mechanismy \u2013 kter\u00e9 zvy\u0161uj\u00ed slo\u017eitost a potenci\u00e1ln\u00ed body opot\u0159eben\u00ed. I kdy\u017e jsou modern\u00ed z\u00e1padkov\u00e1 rel\u00e9 vysoce spolehliv\u00e1, jejich jmenovit\u00e1 mechanick\u00e1 \u017eivotnost je \u010dasto o n\u011bco ni\u017e\u0161\u00ed ne\u017e u ekvivalentn\u00edch nezapad\u00e1vac\u00edch proveden\u00ed, zejm\u00e9na v aplikac\u00edch s vysok\u00fdm cyklem.<\/p>\n<p>Pro aplikace s velmi vysokou sp\u00ednac\u00ed frekvenc\u00ed (stovky nebo tis\u00edce cykl\u016f za den) m\u016f\u017ee nezapad\u00e1vac\u00ed rel\u00e9 nab\u00eddnout del\u0161\u00ed \u017eivotnost. Pro aplikace s ne\u010dast\u00fdm sp\u00edn\u00e1n\u00edm (n\u011bkolik cykl\u016f za den nebo m\u00e9n\u011b) je tento rozd\u00edl obvykle zanedbateln\u00fd.<\/p>\n<h3>7. Cena a dostupnost<\/h3>\n<p>Nezapad\u00e1vac\u00ed rel\u00e9 se vyr\u00e1b\u011bj\u00ed v mnohem v\u011bt\u0161\u00edch objemech a t\u011b\u0161\u00ed se \u0161ir\u0161\u00ed konkurenci na trhu. V\u00fdsledkem je, \u017ee jsou obecn\u011b levn\u011bj\u0161\u00ed a dostupn\u00e9 v \u0161ir\u0161\u00ed \u0161k\u00e1le tvarov\u00fdch faktor\u016f, konfigurac\u00ed kontakt\u016f, nap\u011bt\u00ed c\u00edvky a styl\u016f pouzder.<\/p>\n<p>Zapad\u00e1vac\u00ed rel\u00e9, i kdy\u017e jsou \u0161iroce dostupn\u00e1 od hlavn\u00edch v\u00fdrobc\u016f, maj\u00ed tendenci m\u00edt m\u00edrn\u00fd cenov\u00fd rozd\u00edl \u2013 obvykle o 20 % a\u017e 50 % vy\u0161\u0161\u00ed ne\u017e srovnateln\u00e9 nezapad\u00e1vac\u00ed rel\u00e9. U velkoobjemov\u00fdch spot\u0159ebn\u00edch produkt\u016f je tento rozd\u00edl v n\u00e1kladech v\u00fdznamn\u00fd. U maloobjemov\u00fdch pr\u016fmyslov\u00fdch syst\u00e9m\u016f je obvykle druho\u0159ad\u00fd ve srovn\u00e1n\u00ed s funk\u010dn\u00edmi po\u017eadavky.<\/p>\n<h2>Z\u00e1padkov\u00e9 rel\u00e9 vs. nezapad\u00e1vac\u00ed rel\u00e9: Podrobn\u00e9 srovn\u00e1n\u00ed chov\u00e1n\u00ed<\/h2>\n<table border=\"1\" style=\"border-collapse: collapse; width: 100%; text-align: left;\">\n<thead>\n<tr>\n<th style=\"padding: 8px;\">Sc\u00e9n\u00e1\u0159 chov\u00e1n\u00ed<\/th>\n<th style=\"padding: 8px;\">Pam\u011b\u0165ov\u00e9 rel\u00e9<\/th>\n<th style=\"padding: 8px;\">Nepam\u011b\u0165ov\u00e9 rel\u00e9<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding: 8px;\">Ztr\u00e1ta nap\u00e1jen\u00ed ovl\u00e1d\u00e1n\u00ed, kdy\u017e je rel\u00e9 pod nap\u011bt\u00edm<\/td>\n<td style=\"padding: 8px;\">Kontakty z\u016fst\u00e1vaj\u00ed v poloze pod nap\u011bt\u00edm<\/td>\n<td style=\"padding: 8px;\">Kontakty se vr\u00e1t\u00ed do v\u00fdchoz\u00ed polohy<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\">Obnoven\u00ed nap\u00e1jen\u00ed ovl\u00e1d\u00e1n\u00ed po v\u00fdpadku<\/td>\n<td style=\"padding: 8px;\">Kontakty z\u016fst\u00e1vaj\u00ed v poloze p\u0159ed v\u00fdpadkem<\/td>\n<td style=\"padding: 8px;\">Kontakty za\u010d\u00ednaj\u00ed ve v\u00fdchoz\u00ed poloze; \u0159\u00eddic\u00ed jednotka mus\u00ed znovu aktivovat<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\">\u0158\u00eddic\u00ed jednotka se resetuje nebo restartuje<\/td>\n<td style=\"padding: 8px;\">Kontakty se nezm\u011bn\u00ed \u2013 \u0159\u00eddic\u00ed jednotka mus\u00ed dotazovat nebo p\u0159edpokl\u00e1dat stav<\/td>\n<td style=\"padding: 8px;\">Kontakty ve v\u00fdchoz\u00ed poloze \u2013 zn\u00e1m\u00fd po\u010d\u00e1te\u010dn\u00ed stav<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\">P\u0159eru\u0161en\u00ed vodi\u010de c\u00edvky<\/td>\n<td style=\"padding: 8px;\">Kontakty z\u016fst\u00e1vaj\u00ed v posledn\u00ed poloze (nelze je p\u0159epnout)<\/td>\n<td style=\"padding: 8px;\">Kontakty se vr\u00e1t\u00ed do v\u00fdchoz\u00ed polohy (bezpe\u010dn\u00e9 vypnut\u00ed)<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\">Dlouhodob\u00e9 dr\u017een\u00ed (hodiny a\u017e m\u011bs\u00edce)<\/td>\n<td style=\"padding: 8px;\">Nulov\u00fd v\u00fdkon c\u00edvky, nulov\u00e9 teplo<\/td>\n<td style=\"padding: 8px;\">Nep\u0159etr\u017eit\u00fd v\u00fdkon c\u00edvky, nep\u0159etr\u017eit\u00e9 teplo<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\">Rychl\u00e9 cyklov\u00e1n\u00ed (tis\u00edce operac\u00ed za hodinu)<\/td>\n<td style=\"padding: 8px;\">Ka\u017ed\u00fd cyklus vy\u017eaduje pulz v ka\u017ed\u00e9m sm\u011bru<\/td>\n<td style=\"padding: 8px;\">Jednodu\u0161e zapn\u011bte a vypn\u011bte nap\u011bt\u00ed c\u00edvky<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\">Provoz na baterie<\/td>\n<td style=\"padding: 8px;\">Vynikaj\u00edc\u00ed \u2013 minim\u00e1ln\u00ed spot\u0159eba energie<\/td>\n<td style=\"padding: 8px;\">\u0160patn\u00e9 \u2013 nep\u0159etr\u017eit\u00e1 spot\u0159eba b\u011bhem stavu pod nap\u011bt\u00edm<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<figure style=\"text-align: center; margin: 32px 0;\">\n        <img decoding=\"async\" src=\"https:\/\/img.viox.com\/Application-scenarios-showing-latching-relays-in-smart-meters-and-battery-powered-devices-versus-non-latching-relays-in-industrial-control-panels-and-safety-circuits.webp\" alt=\"Application scenarios showing latching relays in smart meters and battery-powered devices versus non-latching relays in industrial control panels and safety circuits\" style=\"max-width: 100%; height: auto;\"><figcaption><i>Obr\u00e1zek 4: B\u011b\u017en\u00e9 sc\u00e9n\u00e1\u0159e pou\u017eit\u00ed z\u00e1padkov\u00fdch rel\u00e9 vs. nezapad\u00e1vac\u00edch rel\u00e9 v ter\u00e9nu.<\/i><\/figcaption><\/figure>\n<h2>Kdy byste si m\u011bli vybrat z\u00e1padkov\u00e9 rel\u00e9<\/h2>\n<p>Vyberte si z\u00e1padkov\u00e9 rel\u00e9, kdy\u017e aplikace t\u011b\u017e\u00ed z jedn\u00e9 nebo v\u00edce z t\u011bchto podm\u00ednek:<\/p>\n<ul>\n<li><strong>P\u0159epnut\u00fd stav mus\u00ed b\u00fdt zachov\u00e1n bez nep\u0159etr\u017eit\u00e9ho nap\u00e1jen\u00ed c\u00edvky.<\/strong> To je prim\u00e1rn\u00ed a nej\u010dast\u011bj\u0161\u00ed d\u016fvod. Pokud bude rel\u00e9 v dan\u00e9m stavu po del\u0161\u00ed dobu (minuty, hodiny, dny nebo trvale), z\u00e1padkov\u00e9 rel\u00e9 eliminuje ve\u0161ker\u00e9 pl\u00fdtv\u00e1n\u00ed p\u0159\u00edkonem.<\/li>\n<li><strong>Spot\u0159eba energie mus\u00ed b\u00fdt minimalizov\u00e1na.<\/strong> Za\u0159\u00edzen\u00ed nap\u00e1jen\u00e1 z bateri\u00ed, sol\u00e1rn\u00ed d\u00e1lkov\u00e9 telemetrick\u00e9 jednotky, senzory pro sb\u011br energie a za\u0159\u00edzen\u00ed pro m\u011b\u0159en\u00ed spot\u0159eby energie t\u011b\u017e\u00ed z t\u00e9m\u011b\u0159 nulov\u00e9 spot\u0159eby v pohotovostn\u00edm re\u017eimu z\u00e1padkov\u00e9ho rel\u00e9.<\/li>\n<li><strong>Teplo c\u00edvky je konstruk\u010dn\u00ed omezen\u00ed.<\/strong> V uzav\u0159en\u00fdch krytech, kompaktn\u00edch sestav\u00e1ch PCB nebo okoln\u00edch prost\u0159ed\u00edch, kter\u00e9 jsou ji\u017e bl\u00edzko tepeln\u00e9ho hodnocen\u00ed rel\u00e9, m\u016f\u017ee eliminace trval\u00e9ho oh\u0159evu c\u00edvky znamenat rozd\u00edl mezi spolehliv\u00fdm n\u00e1vrhem a tepeln\u011b mezn\u00edm n\u00e1vrhem.<\/li>\n<li><strong>Stav kontaktu mus\u00ed p\u0159e\u017e\u00edt v\u00fdpadky nap\u00e1jen\u00ed.<\/strong> Chytr\u00e9 elektrom\u011bry, bezpe\u010dnostn\u00ed odpojova\u010de a syst\u00e9my \u0159\u00edzen\u00ed osv\u011btlen\u00ed \u010dasto vy\u017eaduj\u00ed, aby posledn\u00ed zadan\u00fd stav p\u0159etrval i p\u0159es jak\u00e9koli p\u0159eru\u0161en\u00ed nap\u00e1jen\u00ed ovl\u00e1d\u00e1n\u00ed.<\/li>\n<li><strong>\u0158\u00eddic\u00ed syst\u00e9m je navr\u017een na z\u00e1klad\u011b logiky nastaven\u00ed\/resetov\u00e1n\u00ed nebo pulzn\u00ed logiky.<\/strong> Pokud architektura \u0159\u00eddic\u00ed jednotky ji\u017e podporuje pulzn\u00ed v\u00fdstupy nebo sp\u00edn\u00e1n\u00ed \u0159\u00edzen\u00e9 ud\u00e1lostmi, z\u00e1padkov\u00e1 rel\u00e9 se p\u0159irozen\u011b integruj\u00ed.<\/li>\n<\/ul>\n<h3>Konkr\u00e9tn\u00ed p\u0159\u00edklady pou\u017eit\u00ed z\u00e1padkov\u00fdch rel\u00e9<\/h3>\n<ul>\n<li><strong>Chytr\u00e9 m\u011b\u0159en\u00ed (elekt\u0159ina, plyn, voda):<\/strong> Odpojovac\u00ed rel\u00e9 uvnit\u0159 chytr\u00e9ho elektrom\u011bru mus\u00ed z\u016fstat v jak\u00e9koli poloze, kterou si utilita vy\u017e\u00e1dala \u2013 i kdy\u017e elektrom\u011br ztrat\u00ed nap\u00e1jen\u00ed na n\u011bkolik dn\u00ed. Z\u00e1padkov\u00e9 rel\u00e9 je jedinou praktickou volbou.<\/li>\n<li><strong>\u0158\u00edzen\u00ed osv\u011btlen\u00ed a automatizace budov:<\/strong> Ovlada\u010de sc\u00e9n, syst\u00e9my zalo\u017een\u00e9 na obsazenosti a centralizovan\u00e9 panely osv\u011btlen\u00ed pou\u017e\u00edvaj\u00ed z\u00e1padkov\u00e1 rel\u00e9 k udr\u017een\u00ed stavu osv\u011btlen\u00ed mezi \u0159\u00eddic\u00edmi p\u0159\u00edkazy bez pl\u00fdtv\u00e1n\u00ed energi\u00ed.<\/li>\n<li><strong>Vzd\u00e1len\u00e9 telekomunika\u010dn\u00ed a utilitn\u00ed sp\u00edn\u00e1n\u00ed:<\/strong> Za\u0159\u00edzen\u00ed instalovan\u00e1 na mobiln\u00edch v\u011b\u017e\u00edch, monitorovac\u00edch stanic\u00edch potrub\u00ed nebo elektrick\u00fdch rozvodn\u00e1ch \u010dasto b\u011b\u017e\u00ed s omezen\u00fdmi rozpo\u010dty energie s ne\u010dast\u00fdmi sp\u00ednac\u00edmi p\u0159\u00edkazy.<\/li>\n<li><strong>Z\u00e1lohov\u00e1n\u00ed p\u0159\u00edstupu bateri\u00ed:<\/strong> Elektronick\u00e9 z\u00e1mky dve\u0159\u00ed a bezpe\u010dnostn\u00ed panely pou\u017e\u00edvaj\u00ed z\u00e1padkov\u00e1 rel\u00e9 k udr\u017een\u00ed stavu z\u00e1mku b\u011bhem p\u0159echod\u016f nap\u00e1jen\u00ed nebo v\u00fdm\u011bny baterie.<\/li>\n<li><strong>L\u00e9ka\u0159sk\u00e9 p\u0159\u00edstroje:<\/strong> Infuzn\u00ed pumpy, monitory pacient\u016f a dal\u0161\u00ed za\u0159\u00edzen\u00ed mohou pou\u017e\u00edvat z\u00e1padkov\u00e9 rel\u00e9 k zachov\u00e1n\u00ed stavu ventil\u016f b\u011bhem v\u00fdm\u011bny baterie nebo kr\u00e1tk\u00fdch v\u00fdpadk\u016f nap\u00e1jen\u00ed.<\/li>\n<\/ul>\n<h2>Kdy byste si m\u011bli vybrat rel\u00e9 bez aretace<\/h2>\n<p>Vyberte rel\u00e9 bez aretace, pokud aplikace t\u011b\u017e\u00ed z t\u011bchto podm\u00ednek:<\/p>\n<ul>\n<li><strong>Obvod by se m\u011bl p\u0159i ztr\u00e1t\u011b nap\u00e1jen\u00ed vr\u00e1tit do definovan\u00e9ho bezpe\u010dn\u00e9ho stavu.<\/strong> Pokud konstruk\u010dn\u00ed filozofie vy\u017eaduje, aby ztr\u00e1ta \u0159\u00eddic\u00edho nap\u00e1jen\u00ed automaticky odpojila v\u00fdstup \u2013 zastavila motor, uzav\u0159ela ventil, aktivovala alarm \u2013 rel\u00e9 bez aretace toto chov\u00e1n\u00ed inherentn\u011b poskytuje.<\/li>\n<li><strong>Jednoduch\u00e1 \u0159\u00eddic\u00ed logika je prioritou.<\/strong> Pokud syst\u00e9m pou\u017e\u00edv\u00e1 z\u00e1kladn\u00ed \u017eeb\u0159\u00edkovou logiku, jednoduch\u00e9 kontakty \u010dasova\u010de, ru\u010dn\u00ed sp\u00edna\u010de nebo PLC s jedn\u00edm v\u00fdstupem, rel\u00e9 bez aretace vy\u017eaduje nejm\u00e9n\u011b slo\u017eit\u00e9 \u0159\u00eddic\u00ed rozhran\u00ed.<\/li>\n<li><strong>Aplikace se \u0159\u00edd\u00ed konven\u010dn\u00edmi postupy pr\u016fmyslov\u00e9ho \u0159\u00edzen\u00ed.<\/strong> V\u011bt\u0161ina pr\u016fmyslov\u00fdch \u0159\u00eddic\u00edch panel\u016f, v\u00fdrobc\u016f stroj\u016f a syst\u00e9mov\u00fdch integr\u00e1tor\u016f navrhuje na z\u00e1klad\u011b chov\u00e1n\u00ed rel\u00e9 bez aretace. Pou\u017eit\u00ed stejn\u00e9ho typu sni\u017euje n\u00e1klady na \u0161kolen\u00ed, zjednodu\u0161uje \u00fadr\u017ebu a je v souladu se zaveden\u00fdmi standardy zapojen\u00ed.<\/li>\n<li><strong>Rel\u00e9 bude \u010dasto cyklovat.<\/strong> V aplikac\u00edch s vysokou frekvenc\u00ed sp\u00edn\u00e1n\u00ed nab\u00edzej\u00ed rel\u00e9 bez aretace obvykle lep\u0161\u00ed mechanickou odolnost a jednodu\u0161\u0161\u00ed po\u017eadavky na \u010dasov\u00e1n\u00ed.<\/li>\n<li><strong>N\u00e1klady jsou v\u00fdznamn\u00fdm omezen\u00edm ve velkoobjemov\u00e9 v\u00fdrob\u011b.<\/strong> U spot\u0159ebn\u00edch produkt\u016f vyr\u00e1b\u011bn\u00fdch v des\u00edtk\u00e1ch tis\u00edc kus\u016f mohou ni\u017e\u0161\u00ed jednotkov\u00e9 n\u00e1klady rel\u00e9 bez aretace smyslupln\u011b ovlivnit kusovn\u00edk.<\/li>\n<\/ul>\n<h3>Konkr\u00e9tn\u00ed p\u0159\u00edklady aplikac\u00ed rel\u00e9 bez aretace<\/h3>\n<ul>\n<li><strong>Pomocn\u00e9 obvody \u0159\u00edzen\u00ed motoru:<\/strong> Vkl\u00e1dac\u00ed rel\u00e9 mezi PLC a styka\u010dem motoru by m\u011bla odpadnout, kdy\u017e PLC ztrat\u00ed nap\u00e1jen\u00ed, \u010d\u00edm\u017e zajist\u00ed zastaven\u00ed motoru.<\/li>\n<li><strong>Obvody alarm\u016f a signalizace:<\/strong> Zvukov\u00e9 a vizu\u00e1ln\u00ed alarmy, kter\u00e9 se mus\u00ed aktivovat (nebo deaktivovat) v p\u0159\u00edm\u00e9 reakci na \u0159\u00eddic\u00ed sign\u00e1l a mus\u00ed se vypnout, kdy\u017e je syst\u00e9m odpojen od nap\u00e1jen\u00ed.<\/li>\n<li><strong>\u0158\u00edzen\u00ed kompresoru HVAC:<\/strong> Styka\u010de kompresoru a rel\u00e9 ventil\u00e1toru, kter\u00e9 se mus\u00ed odpojit p\u0159i selh\u00e1n\u00ed regul\u00e1toru, aby se zabr\u00e1nilo po\u0161kozen\u00ed za\u0159\u00edzen\u00ed.<\/li>\n<li><strong>Automobilov\u00e9 osv\u011btlen\u00ed a p\u0159\u00edslu\u0161enstv\u00ed:<\/strong> Rel\u00e9 sv\u011btlomet\u016f, rel\u00e9 st\u011bra\u010d\u016f a rel\u00e9 klaksonu se mus\u00ed odpojit, kdy\u017e \u0159idi\u010d vypne sp\u00edna\u010d.<\/li>\n<li><strong>Bezpe\u010dnostn\u00ed blokovac\u00ed obvody:<\/strong> Syst\u00e9my nouzov\u00e9ho zastaven\u00ed, blokov\u00e1n\u00ed ochrann\u00fdch dve\u0159\u00ed a monitorovac\u00ed rel\u00e9 sv\u011bteln\u00fdch z\u00e1vor, kter\u00e9 mus\u00ed vynutit vypnut\u00ed v\u00fdstup\u016f, kdy\u017e je bezpe\u010dnostn\u00ed obvod p\u0159eru\u0161en.<\/li>\n<\/ul>\n<h2>Kter\u00e9 rel\u00e9 je lep\u0161\u00ed pro pr\u016fmyslov\u00e9 \u0159\u00eddic\u00ed panely?<\/h2>\n<p>Ve v\u011bt\u0161in\u011b pr\u016fmyslov\u00fdch \u0159\u00eddic\u00edch panel\u016f, <strong>rel\u00e9 bez aretace z\u016fst\u00e1vaj\u00ed standardn\u00ed volbou<\/strong>. D\u016fvody jsou praktick\u00e9:<\/p>\n<ul>\n<li>Konstrukt\u00e9\u0159i panel\u016f o\u010dek\u00e1vaj\u00ed, \u017ee rel\u00e9 odpadnou, kdy\u017e dojde ke ztr\u00e1t\u011b \u0159\u00eddic\u00edho nap\u00e1jen\u00ed.<\/li>\n<li>Technici \u00fadr\u017eby mohou ur\u010dit stav rel\u00e9 kontrolou nap\u011bt\u00ed c\u00edvky.<\/li>\n<li>\u017deb\u0159\u00edkov\u00e1 logika a pevn\u011b zapojen\u00e9 \u0159\u00eddic\u00ed obvody jsou postaveny na p\u0159edpokladu, \u017ee stav rel\u00e9 se rovn\u00e1 stavu c\u00edvky.<\/li>\n<li>Bezpe\u010dnostn\u00ed normy (jako je IEC 60204-1 pro bezpe\u010dnost stroj\u016f) \u010dasto vy\u017eaduj\u00ed, aby ztr\u00e1ta \u0159\u00eddic\u00edho nap\u00e1jen\u00ed vedla k bezpe\u010dn\u00e9mu stavu stroje \u2013 co\u017e p\u0159irozen\u011b odpov\u00edd\u00e1 chov\u00e1n\u00ed bez aretace.<\/li>\n<\/ul>\n<p>Nicm\u00e9n\u011b, <strong>rel\u00e9 s aretac\u00ed se st\u00e1le \u010dast\u011bji pou\u017e\u00edvaj\u00ed v konstrukc\u00edch panel\u016f<\/strong> kde:<\/p>\n<ul>\n<li>Je vy\u017eadov\u00e1na pam\u011b\u0165ov\u00e1 funkce (udr\u017eov\u00e1n\u00ed sv\u011bteln\u00e9 sc\u00e9ny, udr\u017eov\u00e1n\u00ed stavu procesu b\u011bhem kr\u00e1tk\u00e9ho poklesu nap\u00e1jen\u00ed).<\/li>\n<li>Mus\u00ed se sn\u00ed\u017eit spot\u0159eba energie v panelu (velk\u00e9 panely s des\u00edtkami nep\u0159etr\u017eit\u011b nap\u00e1jen\u00fdch rel\u00e9 mohou generovat zna\u010dn\u00e9 teplo).<\/li>\n<li>Panel slou\u017e\u00ed vzd\u00e1len\u00e9mu nebo bateriov\u011b z\u00e1lohovan\u00e9mu syst\u00e9mu, kde je nep\u0159etr\u017eit\u00e9 nap\u00e1jen\u00ed c\u00edvky nepraktick\u00e9.<\/li>\n<\/ul>\n<p>Lep\u0161\u00ed rel\u00e9 pro dan\u00fd panel nen\u00ed to s pokro\u010dilej\u0161\u00edm mechanismem \u2013 je to to, jeho\u017e chov\u00e1n\u00ed odpov\u00edd\u00e1 filozofii \u0159\u00edzen\u00ed a bezpe\u010dnostn\u00edm po\u017eadavk\u016fm panelu. Pro panelov\u00e9 instalace, <a href=\"https:\/\/test.viox.com\/cs\/a-complete-guide-to-modular-contactor\/\">modul\u00e1rn\u00ed styka\u010de<\/a> nab\u00edzej\u00ed podobn\u00e9 v\u00fdhody z hlediska \u00faspory m\u00edsta a lze je vybrat na z\u00e1klad\u011b podobn\u00fdch krit\u00e9ri\u00ed.<\/p>\n<h2>\u010cast\u00e9 chyby p\u0159i v\u00fdb\u011bru, kter\u00fdm je t\u0159eba se vyhnout<\/h2>\n<h3>V\u00fdb\u011br rel\u00e9 s aretac\u00ed pouze pro \u00fasporu energie<\/h3>\n<p>\u00daspory energie jsou re\u00e1ln\u00e9 a cenn\u00e9, ale nesm\u00ed potla\u010dit po\u017eadavky na bezpe\u010dn\u00e9 chov\u00e1n\u00ed p\u0159i poru\u0161e, determinismus stavu po zapnut\u00ed nebo jednoduchost \u00fadr\u017eby. Pokud aplikace vy\u017eaduje zaru\u010den\u00e9 odpadnut\u00ed p\u0159i ztr\u00e1t\u011b nap\u00e1jen\u00ed, rel\u00e9 s aretac\u00ed vytv\u00e1\u0159\u00ed bezpe\u010dnostn\u00ed probl\u00e9m, kter\u00fd nem\u016f\u017ee ospravedlnit \u017e\u00e1dn\u00e1 \u00faspora energie.<\/p>\n<h3>V\u00fdb\u011br rel\u00e9 bez aretace bez vyhodnocen\u00ed dlouhodob\u00e9 doby dr\u017een\u00ed<\/h3>\n<p>Pokud mus\u00ed rel\u00e9 z\u016fstat nap\u00e1jeno po dobu hodin, dn\u016f nebo neomezen\u011b dlouho, m\u016f\u017ee nep\u0159etr\u017eit\u00e9 nap\u00e1jen\u00ed c\u00edvky a v\u00fdsledn\u00e9 teplo zp\u016fsobit probl\u00e9my s tepeln\u00fdm managementem. V prost\u0159ed\u00edch s vysokou okoln\u00ed teplotou nebo v uzav\u0159en\u00fdch krytech m\u016f\u017ee toto opomenut\u00ed v\u00e9st k p\u0159ed\u010dasn\u00e9mu selh\u00e1n\u00ed rel\u00e9 nebo p\u0159eh\u0159\u00e1t\u00ed krytu.<\/p>\n<h3>Ignorov\u00e1n\u00ed chov\u00e1n\u00ed p\u0159i ztr\u00e1t\u011b nap\u00e1jen\u00ed b\u011bhem f\u00e1ze n\u00e1vrhu<\/h3>\n<p>Mnoho chyb p\u0159i v\u00fdb\u011bru rel\u00e9 pramen\u00ed z jednoduch\u00e9ho opomenut\u00ed: n\u00e1vrh\u00e1\u0159sk\u00fd t\u00fdm nikdy explicitn\u011b nedefinoval, co by se m\u011blo st\u00e1t s ka\u017ed\u00fdm v\u00fdstupem, kdy\u017e dojde ke ztr\u00e1t\u011b \u0159\u00eddic\u00edho nap\u00e1jen\u00ed a n\u00e1sledn\u011b se obnov\u00ed. Tato ot\u00e1zka by m\u011bla b\u00fdt zodpov\u011bzena pro ka\u017ed\u00fd rel\u00e9ov\u00fd v\u00fdstup v syst\u00e9mu p\u0159ed v\u00fdb\u011brem typ\u016f rel\u00e9.<\/p>\n<h3>Zapomenut\u00ed po\u017eadavk\u016f na budic\u00ed obvod rel\u00e9 s aretac\u00ed<\/h3>\n<p>Rel\u00e9 s aretac\u00ed s jednou c\u00edvkou nelze budit jednoduch\u00fdm tranzistorov\u00fdm sp\u00edna\u010dem \u2013 pot\u0159ebuje p\u0159ep\u00f3lov\u00e1n\u00ed. Rel\u00e9 s aretac\u00ed se dv\u011bma c\u00edvkami pot\u0159ebuje dva v\u00fdstupn\u00ed kan\u00e1ly na rel\u00e9. Pokud hardwarov\u00e9 vybaven\u00ed regul\u00e1toru tyto po\u017eadavky nepodporuje, v\u00fdb\u011br rel\u00e9 s aretac\u00ed vytv\u00e1\u0159\u00ed probl\u00e9m s \u0159\u00eddic\u00edm syst\u00e9mem, kter\u00e9mu se dalo zcela vyhnout. Nau\u010dte se diagnostikovat <a href=\"https:\/\/test.viox.com\/cs\/contactor-troubleshooting-guide-buzzing-coil-failure\/\">bzu\u010d\u00edc\u00ed c\u00edvky a dal\u0161\u00ed selh\u00e1n\u00ed rel\u00e9<\/a> abyste se vyhnuli podobn\u00fdm probl\u00e9m\u016fm b\u011bhem instalace a provozu.<\/p>\n<h3>P\u0159edpoklad, \u017ee regul\u00e1tor zn\u00e1 stav rel\u00e9 s aretac\u00ed po zapnut\u00ed<\/h3>\n<p>Na rozd\u00edl od rel\u00e9 bez aretace (jeho\u017e stav je p\u0159i zapnut\u00ed v\u017edy \u201cv\u00fdchoz\u00ed\u201d) m\u016f\u017ee b\u00fdt rel\u00e9 s aretac\u00ed po restartu v kter\u00e9koli poloze. \u0158\u00eddic\u00ed software mus\u00ed bu\u010f na\u010d\u00edst stav kontaktu prost\u0159ednictv\u00edm pomocn\u00fdch kontakt\u016f, p\u0159ik\u00e1zat zn\u00e1m\u00fd stav b\u011bhem inicializace, nebo b\u00fdt navr\u017een tak, aby fungoval spr\u00e1vn\u011b bez ohledu na po\u010d\u00e1te\u010dn\u00ed polohu rel\u00e9. Pokud m\u00e1te podez\u0159en\u00ed na selh\u00e1n\u00ed rel\u00e9 b\u011bhem provozu, nau\u010dte se <a href=\"https:\/\/test.viox.com\/cs\/how-to-test-a-bad-starter-relay\/\">jak spr\u00e1vn\u011b otestovat rel\u00e9<\/a> abyste p\u0159esn\u011b diagnostikovali probl\u00e9my.<\/p>\n<h3>Pova\u017eov\u00e1n\u00ed v\u0161ech rel\u00e9 s aretac\u00ed za zam\u011bniteln\u00e1<\/h3>\n<p>Rel\u00e9 s aretac\u00ed s jednou c\u00edvkou a se dv\u011bma c\u00edvkami maj\u00ed z\u00e1sadn\u011b odli\u0161n\u00e9 po\u017eadavky na zapojen\u00ed, budic\u00ed obvody a d\u016fsledky pro \u0159\u00eddic\u00ed logiku. Specifikace \u201crel\u00e9 s aretac\u00ed\u201d v kusovn\u00edku bez specifikace konfigurace c\u00edvky m\u016f\u017ee v\u00e9st k chyb\u00e1m p\u0159i n\u00e1kupu a zpo\u017ed\u011bn\u00edm p\u0159i p\u0159epracov\u00e1n\u00ed.<\/p>\n<h2>Praktick\u00fd kontroln\u00ed seznam pro v\u00fdb\u011br<\/h2>\n<p>Pou\u017eijte tento rozhodovac\u00ed r\u00e1mec k usm\u011brn\u011bn\u00ed v\u00fdb\u011bru typu rel\u00e9:<\/p>\n<table border=\"1\" style=\"border-collapse: collapse; width: 100%; text-align: left;\">\n<thead>\n<tr>\n<th style=\"padding: 8px;\">Ot\u00e1zka<\/th>\n<th style=\"padding: 8px;\">Pokud Ano \u2192 P\u0159ikl\u00e1n\u011bjte se k<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding: 8px;\">Mus\u00ed si rel\u00e9 udr\u017eet sv\u016fj posledn\u00ed stav, kdy\u017e je odpojeno \u0159\u00eddic\u00ed nap\u00e1jen\u00ed?<\/td>\n<td style=\"padding: 8px;\"><strong>Rel\u00e9 s aretac\u00ed<\/strong><\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\">Mus\u00ed se obvod vr\u00e1tit do v\u00fdchoz\u00edho stavu, kdy\u017e dojde ke ztr\u00e1t\u011b \u0159\u00eddic\u00edho nap\u00e1jen\u00ed?<\/td>\n<td style=\"padding: 8px;\"><strong>Rel\u00e9 bez aretace<\/strong><\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\">Je n\u00edzk\u00e1 spot\u0159eba energie kritick\u00fdm po\u017eadavkem n\u00e1vrhu?<\/td>\n<td style=\"padding: 8px;\"><strong>Rel\u00e9 s aretac\u00ed<\/strong><\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\">Je d\u016fle\u017eit\u011bj\u0161\u00ed jednoduch\u00e9, konven\u010dn\u00ed ovl\u00e1dac\u00ed zapojen\u00ed ne\u017e \u00faspora energie?<\/td>\n<td style=\"padding: 8px;\"><strong>Rel\u00e9 bez aretace<\/strong><\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\">Je teplo c\u00edvky probl\u00e9mem v aplikaci s dlouhou dobou provozu nebo s tepeln\u00fdm omezen\u00edm?<\/td>\n<td style=\"padding: 8px;\"><strong>Rel\u00e9 s aretac\u00ed<\/strong><\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\">Vy\u017eaduje bezpe\u010dnostn\u00ed anal\u00fdza chov\u00e1n\u00ed p\u0159i v\u00fdpadku v bezpe\u010dn\u00e9m stavu?<\/td>\n<td style=\"padding: 8px;\"><strong>Rel\u00e9 bez aretace<\/strong><\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\">Je syst\u00e9m nap\u00e1jen z baterie nebo vyu\u017e\u00edv\u00e1 energii z okol\u00ed?<\/td>\n<td style=\"padding: 8px;\"><strong>Rel\u00e9 s aretac\u00ed<\/strong><\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\">M\u00e1 \u0159\u00eddic\u00ed syst\u00e9m k dispozici pouze jednoduch\u00e9 v\u00fdstupy zapnuto\/vypnuto?<\/td>\n<td style=\"padding: 8px;\"><strong>Rel\u00e9 bez aretace<\/strong><\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\">Mus\u00ed b\u00fdt stav rel\u00e9 deterministick\u00fd ihned po zapnut\u00ed?<\/td>\n<td style=\"padding: 8px;\"><strong>Rel\u00e9 bez aretace<\/strong><\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\">Sp\u00edn\u00e1 aplikace z\u0159\u00eddka, ale dr\u017e\u00ed po dlouhou dobu?<\/td>\n<td style=\"padding: 8px;\"><strong>Rel\u00e9 s aretac\u00ed<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Z\u00e1v\u011br<\/h2>\n<p>Volba mezi <strong>pam\u011b\u0165ov\u00fdm rel\u00e9<\/strong> a <strong>nepam\u011b\u0165ov\u00fdm rel\u00e9<\/strong> se nakonec redukuje na jednu ot\u00e1zku: <strong>co by m\u011blo rel\u00e9 d\u011blat, kdy\u017e \u0159\u00eddic\u00ed sign\u00e1l zmiz\u00ed?<\/strong><\/p>\n<p>A <strong>pam\u011b\u0165ov\u00fdm rel\u00e9<\/strong> dr\u017e\u00ed sv\u016fj posledn\u00ed stav. \u0160et\u0159\u00ed energii, eliminuje teplo c\u00edvky b\u011bhem dlouh\u00fdch dob dr\u017een\u00ed a zachov\u00e1v\u00e1 v\u00fdstupn\u00ed pozici i p\u0159i v\u00fdpadc\u00edch nap\u00e1jen\u00ed. Je to spr\u00e1vn\u00e1 volba pro syst\u00e9my citliv\u00e9 na energii, aplikace s pam\u011bt\u00ed stavu, za\u0159\u00edzen\u00ed nap\u00e1jen\u00e1 z baterie a vzd\u00e1len\u00e9 sp\u00ednac\u00ed instalace.<\/p>\n<p>A <strong>nepam\u011b\u0165ov\u00fdm rel\u00e9<\/strong> se vrac\u00ed do sv\u00e9ho v\u00fdchoz\u00edho stavu. Zjednodu\u0161uje \u0159\u00eddic\u00ed logiku, poskytuje inherentn\u00ed bezpe\u010dn\u00fd v\u00fdpadek, je v souladu s konven\u010dn\u00ed pr\u016fmyslovou prax\u00ed a zaji\u0161\u0165uje zn\u00e1m\u00fd po\u010d\u00e1te\u010dn\u00ed stav po ka\u017ed\u00e9m cyklu nap\u00e1jen\u00ed. Je to spr\u00e1vn\u00e1 volba pro standardn\u00ed pr\u016fmyslov\u00e9 \u0159\u00edzen\u00ed, bezpe\u010dnostn\u011b kritick\u00e9 obvody, jednoduch\u00e9 sp\u00ednac\u00ed aplikace a jak\u00fdkoli syst\u00e9m, kde je po\u017eadov\u00e1n v\u00fdpadek p\u0159i ztr\u00e1t\u011b nap\u00e1jen\u00ed.<\/p>\n<p>\u017d\u00e1dn\u00fd typ nen\u00ed univerz\u00e1ln\u011b lep\u0161\u00ed. Lep\u0161\u00ed rel\u00e9 je to, jeho\u017e p\u0159irozen\u00e9 chov\u00e1n\u00ed odpov\u00edd\u00e1 funk\u010dn\u00edm a bezpe\u010dnostn\u00edm po\u017eadavk\u016fm va\u0161\u00ed konkr\u00e9tn\u00ed aplikace. Nejprve definujte, co se mus\u00ed st\u00e1t p\u0159i ztr\u00e1t\u011b nap\u00e1jen\u00ed \u2013 spr\u00e1vn\u00fd typ rel\u00e9 z toho vyplyne.<\/p>\n<h2>\u010cASTO KLADEN\u00c9 DOTAZY<\/h2>\n<h3>Jak\u00fd je hlavn\u00ed rozd\u00edl mezi bistabiln\u00edm a monostabiln\u00edm rel\u00e9?<\/h3>\n<p>A <strong>pam\u011b\u0165ov\u00fdm rel\u00e9<\/strong> udr\u017euje svou posledn\u00ed polohu kontaktu po odstran\u011bn\u00ed \u0159\u00eddic\u00edho sign\u00e1lu \u2013 \u201cpamatuje si\u201d, zda bylo nastaveno nebo resetov\u00e1no. A <strong>nepam\u011b\u0165ov\u00fdm rel\u00e9<\/strong> se vrac\u00ed do sv\u00e9 pru\u017einou zat\u00ed\u017een\u00e9 v\u00fdchoz\u00ed polohy, jakmile je odpojeno nap\u00e1jen\u00ed c\u00edvky. Tento rozd\u00edl v udr\u017een\u00ed stavu je z\u00e1sadn\u00ed rozd\u00edl mezi t\u011bmito dv\u011bma typy.<\/p>\n<h3>Je bistabiln\u00ed rel\u00e9 tot\u00e9\u017e co rel\u00e9 s aretac\u00ed?<\/h3>\n<p>Ano. V praktick\u00e9m in\u017een\u00fdrsk\u00e9m pou\u017eit\u00ed term\u00edny <strong>pam\u011b\u0165ov\u00fdm rel\u00e9<\/strong> a <strong>bistabiln\u00ed rel\u00e9<\/strong> ozna\u010duj\u00ed stejn\u00e9 za\u0159\u00edzen\u00ed. Naz\u00fdv\u00e1 se \u201cbistabiln\u00ed\u201d, proto\u017ee m\u00e1 dva stabiln\u00ed klidov\u00e9 stavy (nastaveno a resetov\u00e1no) a z\u016fst\u00e1v\u00e1 v tom stavu, do kter\u00e9ho bylo naposledy p\u0159epnuto, bez nutnosti trval\u00e9ho nap\u00e1jen\u00ed.<\/p>\n<h3>Je monostabiln\u00ed rel\u00e9 tot\u00e9\u017e co rel\u00e9 bez aretace?<\/h3>\n<p>Ano. Jisti\u010d GFCI <strong>nepam\u011b\u0165ov\u00fdm rel\u00e9<\/strong> je b\u011b\u017en\u011b popisov\u00e1no jako <strong>monostabiln\u00ed rel\u00e9<\/strong> proto\u017ee m\u00e1 pouze jeden stabiln\u00ed stav \u2013 svou polohu s vratnou pru\u017einou (bez nap\u011bt\u00ed). Energizovan\u00fd stav je udr\u017eov\u00e1n pouze trval\u00fdm proudem c\u00edvky a nen\u00ed nez\u00e1visle stabiln\u00ed.<\/p>\n<h3>Kter\u00fd typ rel\u00e9 spot\u0159ebov\u00e1v\u00e1 m\u00e9n\u011b energie?<\/h3>\n<p>A <strong>pam\u011b\u0165ov\u00fdm rel\u00e9<\/strong> spot\u0159ebov\u00e1v\u00e1 v\u00fdrazn\u011b m\u00e9n\u011b energie v aplikac\u00edch, kde mus\u00ed b\u00fdt sp\u00ednan\u00fd stav udr\u017eov\u00e1n po del\u0161\u00ed dobu. Spot\u0159ebov\u00e1v\u00e1 energii pouze b\u011bhem kr\u00e1tk\u00e9ho sp\u00ednac\u00edho impulzu (typicky 20\u2013100 ms), zat\u00edmco monostabiln\u00ed rel\u00e9 spot\u0159ebov\u00e1v\u00e1 trval\u00fd proud c\u00edvky po celou dobu dr\u017een\u00ed. U rel\u00e9 dr\u017een\u00e9ho pod nap\u011bt\u00edm po dobu 24 hodin m\u016f\u017ee b\u00fdt rozd\u00edl v energii n\u011bkolik \u0159\u00e1d\u016f.<\/p>\n<h3>Kter\u00e9 rel\u00e9 je lep\u0161\u00ed pro chov\u00e1n\u00ed v bezpe\u010dn\u00e9m stavu?<\/h3>\n<p>A <strong>nepam\u011b\u0165ov\u00fdm rel\u00e9<\/strong> je obecn\u011b lep\u0161\u00ed pro aplikace s bezpe\u010dn\u00fdm stavem, proto\u017ee se p\u0159i ztr\u00e1t\u011b \u0159\u00eddic\u00edho nap\u00e1jen\u00ed inherentn\u011b vrac\u00ed do sv\u00e9ho v\u00fdchoz\u00edho stavu. Konstrukt\u00e9\u0159i mohou obvod uspo\u0159\u00e1dat tak, aby tento v\u00fdchoz\u00ed stav byl bezpe\u010dn\u00fdm stavem. Bistabiln\u00ed rel\u00e9 z\u016fst\u00e1v\u00e1 ve sv\u00e9 posledn\u00ed poloze bez ohledu na stav \u0159\u00eddic\u00edho syst\u00e9mu, co\u017e vy\u017eaduje dal\u0161\u00ed bezpe\u010dnostn\u00ed opat\u0159en\u00ed, pokud je vy\u017eadov\u00e1no chov\u00e1n\u00ed v bezpe\u010dn\u00e9m stavu.<\/p>\n<h3>Kter\u00e9 rel\u00e9 je lep\u0161\u00ed pro za\u0159\u00edzen\u00ed nap\u00e1jen\u00e1 z baterie?<\/h3>\n<p><strong>Bistabiln\u00ed rel\u00e9<\/strong> jsou siln\u011b preferov\u00e1na pro syst\u00e9my nap\u00e1jen\u00e9 z baterie. Proto\u017ee nevy\u017eaduj\u00ed \u017e\u00e1dnou udr\u017eovac\u00ed energii mezi sp\u00ednac\u00edmi ud\u00e1lostmi, mohou prodlou\u017eit \u017eivotnost baterie o n\u011bkolik \u0159\u00e1d\u016f ve srovn\u00e1n\u00ed s monostabiln\u00edm rel\u00e9, kter\u00e9 odeb\u00edr\u00e1 trval\u00fd proud c\u00edvky. D\u00edky tomu jsou standardn\u00ed volbou v chytr\u00fdch m\u011b\u0159i\u010d\u00edch, p\u0159enosn\u00fdch p\u0159\u00edstroj\u00edch a vzd\u00e1len\u00fdch telemetrick\u00fdch za\u0159\u00edzen\u00edch.<\/p>\n<h3>Je bistabiln\u00ed rel\u00e9 obt\u00ed\u017en\u011bj\u0161\u00ed ovl\u00e1dat ne\u017e monostabiln\u00ed rel\u00e9?<\/h3>\n<p>M\u016f\u017ee b\u00fdt. A <strong>nepam\u011b\u0165ov\u00fdm rel\u00e9<\/strong> vy\u017eaduje pouze jednoduch\u00fd nap\u011b\u0165ov\u00fd sign\u00e1l zapnuto\/vypnuto. A <strong>jednoc\u00edvkov\u00e9 rel\u00e9 s aretac\u00ed<\/strong> vy\u017eaduje zm\u011bnu polarity (typicky budi\u010d H-m\u016fstku), zat\u00edmco a <strong>dvouc\u00edvkov\u00e9 rel\u00e9 s aretac\u00ed<\/strong> vy\u017eaduje dva samostatn\u00e9 \u0159\u00eddic\u00ed v\u00fdstupy. Krom\u011b toho m\u016f\u017ee \u0159\u00eddic\u00ed syst\u00e9m pot\u0159ebovat \u0159\u00eddit d\u00e9lku impulzu a sledovat aktu\u00e1ln\u00ed stav rel\u00e9, co\u017e zvy\u0161uje slo\u017eitost softwaru.<\/p>\n<h3>Jak\u00fd je rozd\u00edl mezi jedno-c\u00edvkov\u00fdm a dvou-c\u00edvkov\u00fdm bistabiln\u00edm rel\u00e9?<\/h3>\n<p>A <strong>jednoc\u00edvkov\u00e9 rel\u00e9 s aretac\u00ed<\/strong> pou\u017e\u00edv\u00e1 jednu c\u00edvku a p\u0159ep\u00edn\u00e1 mezi stavy nastaven\u00ed a resetov\u00e1n\u00ed zm\u011bnou polarity proudov\u00e9ho impulzu. A <strong>dvouc\u00edvkov\u00e9 rel\u00e9 s aretac\u00ed<\/strong> pou\u017e\u00edv\u00e1 dv\u011b samostatn\u00e9 c\u00edvky \u2013 jednu pro nastaven\u00ed, jednu pro resetov\u00e1n\u00ed \u2013 ka\u017ed\u00e1 je buzen\u00e1 impulzem s jednou polaritou. Dvou-c\u00edvkov\u00e9 konstrukce zjednodu\u0161uj\u00ed budic\u00ed obvod, ale vy\u017eaduj\u00ed v\u00edce kabel\u00e1\u017ee a dal\u0161\u00ed \u0159\u00eddic\u00ed v\u00fdstup.<\/p>\n<h3>Mohu pou\u017e\u00edt bistabiln\u00ed rel\u00e9 v bezpe\u010dnostn\u011b kritick\u00e9m obvodu?<\/h3>\n<p>Ano, ale s dal\u0161\u00edmi konstruk\u010dn\u00edmi opat\u0159en\u00edmi. Proto\u017ee se bistabiln\u00ed rel\u00e9 automaticky nevrac\u00ed do bezpe\u010dn\u00e9ho stavu p\u0159i ztr\u00e1t\u011b nap\u00e1jen\u00ed, mus\u00ed bezpe\u010dnostn\u00ed n\u00e1vrh zahrnovat nez\u00e1visl\u00fd mechanismus, kter\u00fd vynut\u00ed rel\u00e9 do bezpe\u010dn\u00e9 polohy \u2013 nap\u0159\u00edklad pevn\u011b zapojen\u00fd bezpe\u010dnostn\u00ed obvod, hl\u00eddac\u00ed \u010dasova\u010d nebo redundantn\u00ed monostabiln\u00ed rel\u00e9 v s\u00e9rii. Bezpe\u010dnostn\u00ed anal\u00fdza mus\u00ed v\u00fdslovn\u011b zohlednit chov\u00e1n\u00ed bistabiln\u00edho rel\u00e9 p\u0159i zachov\u00e1n\u00ed stavu.<\/p>\n<h3>M\u00e1m pou\u017e\u00edt bistabiln\u00ed rel\u00e9 v ka\u017ed\u00e9m n\u00edzkoenergetick\u00e9m proveden\u00ed?<\/h3>\n<p>Ne nutn\u011b. I kdy\u017e je energetick\u00e1 v\u00fdhoda jasn\u00e1, mus\u00edte tak\u00e9 vyhodnotit po\u017eadovan\u00e9 chov\u00e1n\u00ed p\u0159i resetov\u00e1n\u00ed, dostupn\u00e9 mo\u017enosti budic\u00edho obvodu, pot\u0159ebu determinismu stavu p\u0159i zapnut\u00ed a co by se m\u011blo st\u00e1t b\u011bhem poruchy \u0159\u00eddic\u00edho syst\u00e9mu. Pokud n\u011bkter\u00fd z t\u011bchto faktor\u016f up\u0159ednost\u0148uje monostabiln\u00ed rel\u00e9, samotn\u00e1 \u00faspora energie nemus\u00ed ospravedlnit zv\u00fd\u0161enou slo\u017eitost.<\/p>\n<h3>Jak pozn\u00e1m stav bistabiln\u00edho rel\u00e9 po zapnut\u00ed?<\/h3>\n<p>Na rozd\u00edl od monostabiln\u00edho rel\u00e9 (kter\u00e9 je p\u0159i zapnut\u00ed v\u017edy ve sv\u00e9 v\u00fdchoz\u00ed poloze) m\u016f\u017ee b\u00fdt bistabiln\u00ed rel\u00e9 v kter\u00e9mkoli stavu. K ur\u010den\u00ed jeho polohy m\u016f\u017eete pou\u017e\u00edt <strong>pomocn\u00e9 kontakty<\/strong> kter\u00e9 poskytuj\u00ed zp\u011btnovazebn\u00ed sign\u00e1l do \u0159\u00eddic\u00ed jednotky, nebo m\u016f\u017eete <strong>p\u0159ik\u00e1zat zn\u00e1m\u00fd stav<\/strong> b\u011bhem inicializa\u010dn\u00ed sekvence odesl\u00e1n\u00edm impulzu nastaven\u00ed nebo resetov\u00e1n\u00ed p\u0159i spu\u0161t\u011bn\u00ed.<\/p>\n<h3>Stoj\u00ed bistabiln\u00ed rel\u00e9 v\u00edce ne\u017e monostabiln\u00ed rel\u00e9?<\/h3>\n<p>Obecn\u011b ano. Bistabiln\u00ed rel\u00e9 maj\u00ed m\u00edrn\u00fd cenov\u00fd rozd\u00edl \u2013 typicky o 20\u201350 % v\u00edce ne\u017e srovnateln\u00e9 monostabiln\u00ed rel\u00e9 \u2013 kv\u016fli dal\u0161\u00edm permanentn\u00edm magnet\u016fm nebo mechanick\u00fdm areta\u010dn\u00edm sou\u010d\u00e1stem a ni\u017e\u0161\u00edm objem\u016fm v\u00fdroby. V n\u00e1kladov\u011b citliv\u00fdch velkoobjemov\u00fdch produktech na tomto rozd\u00edlu z\u00e1le\u017e\u00ed. V pr\u016fmyslov\u00fdch aplikac\u00edch s men\u0161\u00edm objemem obvykle funk\u010dn\u00ed po\u017eadavky p\u0159eva\u017euj\u00ed nad rozd\u00edlem v n\u00e1kladech.<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>If you are choosing between a latching relay and a non-latching relay, one distinction decides the rest: a latching relay holds its last contact position after the control signal is removed, while a non-latching relay springs back to its default state the moment coil power disappears. That single behavioral difference ripples through every other design [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":22467,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-22466","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"_links":{"self":[{"href":"https:\/\/test.viox.com\/cs\/wp-json\/wp\/v2\/posts\/22466","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/test.viox.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/test.viox.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/test.viox.com\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/test.viox.com\/cs\/wp-json\/wp\/v2\/comments?post=22466"}],"version-history":[{"count":1,"href":"https:\/\/test.viox.com\/cs\/wp-json\/wp\/v2\/posts\/22466\/revisions"}],"predecessor-version":[{"id":22468,"href":"https:\/\/test.viox.com\/cs\/wp-json\/wp\/v2\/posts\/22466\/revisions\/22468"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/test.viox.com\/cs\/wp-json\/wp\/v2\/media\/22467"}],"wp:attachment":[{"href":"https:\/\/test.viox.com\/cs\/wp-json\/wp\/v2\/media?parent=22466"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/test.viox.com\/cs\/wp-json\/wp\/v2\/categories?post=22466"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/test.viox.com\/cs\/wp-json\/wp\/v2\/tags?post=22466"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}