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PLC中COM端口如何接線?

發布日期:2022-04-22 點擊率:1601

    什么是COM端口?我們今天說的COM端口,不是我們之前所說的“串行通訊端口”,而是我們購買PLC,準備設計和配線的時候看見在接線端子上面標記的‘COM’是指什么,需要怎么接線,接下來小編給大家介紹一下。

plc  com端口

    一般來講:COM可以接電源負或正,COM如果接負其他和這個COM同組的端子統一接正,否則不會有信號,反之COM接正其他和這個COM同組的端子統一接負。

    這只是表面我們接線方式,實質我們要分是繼電器輸出還是晶體管輸出兩種情況來具體分析是接正還是接負。

    COM端口是公共端,不需要編程.

    繼電器輸出:對于繼電器形式來說,COM端接火線,YO接通時就輸出220V電壓;YO接負載,負載的另一端接零線,就可以了。或者COM端接正24V,YO輸出時就輸出正24V電壓;接電源負載,輸出就是負的。

    晶體管輸出:對于晶體管輸出,COM端口一般都接24V電源的負端。

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