{"id":14250,"date":"2024-08-25T14:59:00","date_gmt":"2024-08-25T06:59:00","guid":{"rendered":"https:\/\/lorentzzi.com\/?p=14250"},"modified":"2025-07-07T10:22:43","modified_gmt":"2025-07-07T02:22:43","slug":"wet-vs-dry-contacts-in-temperature-controller-what-are-the-differences","status":"publish","type":"post","link":"https:\/\/lorentzzi.com\/pt\/wet-vs-dry-contacts-in-temperature-controller-what-are-the-differences\/","title":{"rendered":"Contatos \u00famidos e secos no controlador de temperatura: Quais s\u00e3o as diferen\u00e7as?"},"content":{"rendered":"
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No campo da automa\u00e7\u00e3o industrial e do conforto dom\u00e9stico, controladores de temperatura<\/a><\/span> desempenham um papel insubstitu\u00edvel na manuten\u00e7\u00e3o da temperatura desejada. O princ\u00edpio de funcionamento desse controlador \u00e9, na verdade, muito simples: ele compara a temperatura real atual com a temperatura-alvo que voc\u00ea definiu e, em seguida, liga ou desliga automaticamente a energia do equipamento de aquecimento ou resfriamento at\u00e9 que as duas atinjam o mesmo n\u00edvel. Nesse processo, o papel dos contatos \u00e9 indispens\u00e1vel. Este artigo explorar\u00e1 mais detalhadamente a diferen\u00e7a entre contatos secos e contatos \u00famidos em controladores de temperatura industriais e suas aplica\u00e7\u00f5es espec\u00edficas.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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O que \u00e9 contato seco?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Um contato seco \u00e9 uma chave passiva com dois estados: <\/span>fechado e aberto<\/b>. N\u00e3o h\u00e1 polaridade entre os dois contatos e eles podem ser trocados. Os sinais de contato seco comuns incluem v\u00e1rios interruptores, como sa\u00eddas de chaves de limite, bot\u00f5es, rel\u00e9s eletromagn\u00e9ticos, chaves reed e contatores CA, etc.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Nos controladores de temperatura pid industriais, os contatos secos geralmente s\u00e3o chamados de rel\u00e9s, que n\u00e3o podem fornecer tens\u00e3o e corrente a cargas externas. Se o aquecedor tiver que ser operado, uma fonte de alimenta\u00e7\u00e3o externa deve ser conectada aos contatos do rel\u00e9.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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O que \u00e9 contato \u00famido?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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O contato molhado \u00e9 uma chave ativa com dois estados:<\/span> com e sem alimenta\u00e7\u00e3o<\/b>. H\u00e1 polaridade entre os dois contatos e eles n\u00e3o podem ser invertidos. As formas comuns de contatos \u00famidos incluem sinais de contato seco conectados \u00e0 fonte de alimenta\u00e7\u00e3o, sa\u00edda de n\u00edvel TTL, sa\u00edda do coletor e VCC de transistores NPN, PNP, sa\u00edda do coletor e VCC de <\/span>Transistor Darlington<\/span><\/a><\/span>e a sa\u00edda dos sensores de proximidade.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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No controlador de temperatura pid, a sa\u00edda do SSR \u00e9 um contato \u00famido, que pode fornecer energia diretamente aos componentes de controle do rel\u00e9 de estado s\u00f3lido. Geralmente, o contato \u00famido \u00e9 uma fonte de alimenta\u00e7\u00e3o de 12 VCC 20 mA, e n\u00e3o requer fonte de alimenta\u00e7\u00e3o externa.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Principais diferen\u00e7as entre contatos secos e \u00famidos<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\tItem<\/span><\/th>\n\t\t\t \t\t\t\t \n\t\t\t\t\t\t\t\t\t\t\t\t\t\tContatos secos<\/span><\/th>\n\t\t\t \t\t\t\t \n\t\t\t\t\t\t\t\t\t\t\t\t\t\tContatos \u00famidos<\/span><\/th>\n\t\t\t \t\t\t\t <\/tr>\n\t\t\t <\/thead>\n\t\t\t \t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\tDefini\u00e7\u00e3o\t\t\t\t\t\t\t\t\t\t\t\t<\/div><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t \t\t\t\t\t\t\t\t\t\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\tChave passiva com dois estados: fechado e aberto\t\t\t\t\t\t\t\t\t\t\t\t<\/div><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t \t\t\t\t\t\t\t\t\t\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\tChave ativa, com dois estados: energizado e n\u00e3o energizado\t\t\t\t\t\t\t\t\t\t\t\t<\/div><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/tr>\n\t\t\t \t\t\t\t\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\tPolaridade\t\t\t\t\t\t\t\t\t\t\t\t<\/div><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t \t\t\t\t\t\t\t\t\t\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\tSem polaridade, os contatos s\u00e3o intercambi\u00e1veis\t\t\t\t\t\t\t\t\t\t\t\t<\/div><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t \t\t\t\t\t\t\t\t\t\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\tPolaridade, os contatos n\u00e3o podem ser trocados\t\t\t\t\t\t\t\t\t\t\t\t<\/div><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/tr>\n\t\t\t \t\t\t\t\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\tSinais comuns\t\t\t\t\t\t\t\t\t\t\t\t<\/div><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t \t\t\t\t\t\t\t\t\t\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\tInterruptor de limite, interruptor de deslocamento, interruptor de p\u00e9, interruptor rotativo, interruptor de temperatura, interruptor de n\u00edvel de l\u00edquido, etc.; bot\u00e3o; sa\u00edda de sensor; rel\u00e9, sa\u00edda de interruptor reed\t\t\t\t\t\t\t\t\t\t\t\t<\/div><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t \t\t\t\t\t\t\t\t\t\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\tSinal de contato seco conectado \u00e0 fonte de alimenta\u00e7\u00e3o; sa\u00edda de n\u00edvel TTL; sa\u00edda do coletor do transistor NPN e VCC; sa\u00edda do coletor do tubo Darlington e VCC; sa\u00edda do sensor de reflex\u00e3o infravermelho e do sensor de barreira\t\t\t\t\t\t\t\t\t\t\t\t<\/div><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/tr>\n\t\t\t \t\t\t\t\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\tFaixa de tens\u00e3o\t\t\t\t\t\t\t\t\t\t\t\t<\/div><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t \t\t\t\t\t\t\t\t\t\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\tSem necessidade de tens\u00e3o\t\t\t\t\t\t\t\t\t\t\t\t<\/div><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t \t\t\t\t\t\t\t\t\t\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\tO controle industrial normalmente usa DC0~30V, o padr\u00e3o \u00e9 DC24V; a sa\u00edda AC110~220V tamb\u00e9m pode ser de contato \u00famido\t\t\t\t\t\t\t\t\t\t\t\t<\/div><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/tr>\n\t\t\t \t\t\t\t\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\tVantagens\t\t\t\t\t\t\t\t\t\t\t\t<\/div><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t \t\t\t\t\t\t\t\t\t\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\tCapaz de transportar correntes mais altas; adequado para dispositivos de alta pot\u00eancia\t\t\t\t\t\t\t\t\t\t\t\t<\/div><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t \t\t\t\t\t\t\t\t\t\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\tMais adequado para cargas pequenas de CC, se os contatos secos estiverem conectados \u00e0 alimenta\u00e7\u00e3o, tamb\u00e9m \u00e9 poss\u00edvel executar cargas de alta pot\u00eancia.\t\t\t\t\t\t\t\t\t\t\t\t<\/div><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/tr>\n\t\t\t \t\t\t\t\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\tSeguran\u00e7a\t\t\t\t\t\t\t\t\t\t\t\t<\/div><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t \t\t\t\t\t\t\t\t\t\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\tComo n\u00e3o transporta tens\u00e3o ou corrente, a interface \u00e9 altamente segura e adequada para conectar componentes sens\u00edveis.\t\t\t\t\t\t\t\t\t\t\t\t<\/div><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t \t\t\t\t\t\t\t\t\t\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\tPreste aten\u00e7\u00e3o \u00e0 polaridade, pois uma conex\u00e3o inadequada pode danificar o dispositivo\t\t\t\t\t\t\t\t\t\t\t\t<\/div><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/tr>\n\t\t\t \t\t\t\t\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\tFun\u00e7\u00e3o\t\t\t\t\t\t\t\t\t\t\t\t<\/div><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t \t\t\t\t\t\t\t\t\t\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\u00c9 usado para transmiss\u00e3o de sinais ou controle de circuitos externos e n\u00e3o alimenta diretamente a carga.\t\t\t\t\t\t\t\t\t\t\t\t<\/div><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t \t\t\t\t\t\t\t\t\t\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\tEle fornece energia diretamente \u00e0 carga e, quando fechado, completa o circuito e permite o fluxo de corrente.\t\t\t\t\t\t\t\t\t\t\t\t<\/div><\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/td>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/tr>\n\t\t\t \t\t\t <\/tbody>\n\t\t\t<\/table>\n\t\t<\/div>\n\t \t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Aplica\u00e7\u00f5es em sistemas de controle de temperatura<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Os contatos secos s\u00e3o sa\u00eddas de rel\u00e9 nos controladores de temperatura pid acima e n\u00e3o podem alimentar diretamente aquecedores ou outros dispositivos intermedi\u00e1rios. Portanto, se voc\u00ea tiver apenas rel\u00e9s intermedi\u00e1rios ou contatores CA, tente usar esses contatos secos (sa\u00eddas de rel\u00e9). O diagrama de fia\u00e7\u00e3o \u00e9 o seguinte, por exemplo:<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"Diagrama\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Os contatos \u00famidos, chamados principalmente de sa\u00eddas SSR em controladores de temperatura pid, s\u00e3o sa\u00eddas que podem alimentar dispositivos externos. Os contatos \u00famidos s\u00e3o usados principalmente para controlar a corrente alternada rel\u00e9s de estado s\u00f3lido<\/a><\/span> controlados por CC em sistemas de controle de temperatura. O diagrama de fia\u00e7\u00e3o t\u00edpico geralmente \u00e9 o seguinte:<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"Diagrama\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t

Conclus\u00e3o<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

Em resumo, os contatos secos n\u00e3o podem alimentar diretamente a carga, enquanto os contatos \u00famidos podem. Outra diferen\u00e7a importante \u00e9 que, se os dois contatos operarem diretamente a carga, o contato seco pode operar uma carga grande, enquanto o contato \u00famido s\u00f3 pode operar uma carga pequena. Quanto aos dois contatos no termostato pid, o contato seco representa a sa\u00edda do rel\u00e9 e o contato \u00famido \u00e9 a sa\u00edda do rel\u00e9 de estado s\u00f3lido<\/span><\/p>

Nosso Novo controlador de temperatura TCN4 pid desenvolvido<\/a><\/span> tem dois contatos - contato seco (sa\u00edda de rel\u00e9) e contato \u00famido (acionamento do SSR), o que o torna muito adequado para muitas aplica\u00e7\u00f5es sem restri\u00e7\u00f5es, e voc\u00ea pode alternar facilmente a sa\u00edda pressionando um bot\u00e3o. Clique no bot\u00e3o abaixo para ver mais detalhes dos nossos controladores de temperatura com sa\u00eddas SSR+rel\u00e9!<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\"Controlador\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"

In the field of industrial automation and home comfort, temperature controllers play an irreplaceable role in maintaining the desired temperature. The working principle of this controller is actually very simple: it compares the current actual temperature with the target temperature you set, and then automatically turns on or off the power of heating or cooling […]<\/p>\n","protected":false},"author":1,"featured_media":14258,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"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":"disabled","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-14250","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-temperature-controller"],"yoast_head":"\nWet Vs. 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