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az526357932
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樓主  發(fā)表于: 2013-05-06 00:53
請問(wèn)為什么PLC電源接進(jìn)去輸入端用電筆測會(huì )亮呢COM端子沒(méi)有接線(xiàn)？我拿PNP和NPN的光電開(kāi)關(guān)接進(jìn)去都沒(méi)輸入呢？接線(xiàn)自己覺(jué)得也沒(méi)有接錯。
wang324521
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1樓  發(fā)表于: 2013-05-06 15:53
你外接24V電源了嗎？
az526357932
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發(fā)帖數量: 47 個(gè)
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2樓  發(fā)表于: 2013-05-06 16:02
外接24V電源？接在哪里��？

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