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653577543
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樓主  發(fā)表于: 2014-03-08 15:48
圖片:
圖片:
  本人看了工程師的電路圖但就是不知道為什么這樣接,請問(wèn)是怎么工作的,電流怎么流的
sjm213
有小知識,無(wú)大學(xué)問(wèn)。
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1樓  發(fā)表于: 2014-03-08 23:17
1.輸入模塊:
輸入均為開(kāi)關(guān)信號,V+通過(guò)外部信號的接通,使I**端子有電,從內部電路返回到M端子形成回路,該過(guò)程中通過(guò)內部光耦告知PLC內存該觸點(diǎn)為ON;
I0.0~I0.7、I1.0~I1.7、I2.0~I2.7分別與0M、1M、2M各自組成回路。
2.輸出模塊:
某一輸出點(diǎn)導通后,M端V-與Q點(diǎn)接通,使電磁閥下端電壓為V-,而其上端電壓直接為V+,故兩端帶電從而動(dòng)作。
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