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工控曉剛
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樓主  發(fā)表于: 2021-09-25 17:31
松下FP0C32T PLC,輸入端x正負都可以接，如果我com接正,x端輸入是高電平還是低電平，如果x端接npn型傳感器，com端必須接0v嗎?還是正負都可以，求大佬解惑�。。�！
�。�！
wangnaizhi
級別: 工控俠客
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1樓  發(fā)表于: 2021-09-26 10:27
圖片：
現在PLC的輸入端 大多數都是雙輸入模式的（NPN  PNP 都可以） 看一下內部的電路圖 你就明白怎么接線(xiàn)了    正常輸入端都是（光電隔離）光耦  說(shuō)直白點(diǎn) 就是點(diǎn)亮發(fā)光二極管就算那個(gè)點(diǎn)有信號了
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