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xulifei
與自動(dòng)化，工控握手！
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樓主  發(fā)表于: 2012-04-30 20:40
小弟發(fā)現個(gè)問(wèn)題~~~~PLC上輸入只有一個(gè)COM口，為什么輸出的COM分開(kāi)呢~~~~~求大大告知~~謝謝了
學(xué)習，努力
hxl202319
工資就像大姨媽?zhuān)辉乱淮�，一周就沒(méi)了
級別: 網(wǎng)絡(luò )英雄

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1樓  發(fā)表于: 2012-04-30 21:20
1.輸入點(diǎn)的電流小，輸出點(diǎn)電流大
2.COM點(diǎn)分組使不同電壓組別可以隔離。例如你控制電磁閥椒24V，接觸器是220V，如果COM點(diǎn)不區分，勢必使220V電壓串  入24V回路，造成不必要的危險
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