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zhaosheng998
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樓主  發(fā)表于: 2014-03-30 15:24
我想問(wèn)一下，兩線(xiàn)光電開(kāi)關(guān)作為輸入怎樣接到PLC的輸入點(diǎn)，是直接接com端和輸入端的點(diǎn)嗎？
fom
冰心玉壺
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1樓  發(fā)表于: 2014-03-30 20:35
引用
引用第2樓chou2003于2014-03-30 16:32發(fā)表的  :
兩線(xiàn)的經(jīng)常誤動(dòng)作，還是用3線(xiàn)的可靠。

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