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walwjskj
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樓主  發(fā)表于: 2018-02-09 16:59
西門(mén)子1200的PLC，輸出點(diǎn)接線(xiàn)的時(shí)候是否要經(jīng)過(guò)中間繼電器，我們這里以前的機器都是輸出通過(guò)中間繼電器，然后再接到控制目標上去的， 為什么要這樣啊，我問(wèn)了一個(gè)人，說(shuō)是放置PLC電流防止不夠，是這個(gè)原因嗎？請問(wèn)這個(gè)怎么計算，ET200的輸出好像就不需要，那PLC旁邊的附加IO模塊例如6ES7 223-1BL32-OXBO這個(gè)模塊的輸出要不要走中間繼電器呢，求指導
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1樓  發(fā)表于: 2018-03-12 09:20
也可以理解為保護作用吧

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