三线制流量计输出4到20毫安电流怎么接到PLC输入模块上

2024-12-25 21:20:21
推荐回答(3个)
回答1:

A-电源正,接电源正极,如24V+
B-信号正,接PLC的CH+
C-信号负,接PLC的CH-,同时,再把C和电源负极相接。即传感器的信号负和电源的负极都接入PLC AI模块的信号负端口上。
之所以测不到输出信号,是因为信号负没有与电源负相连,未形成回路。

回答2:

这种负极一般是公用的,大部分情况下红色电源线,黄色是4~20ma,黑色或白色负极公用。万用表测得时候电源的正负必须接上,然后将万用表串在信号线回路。

回答3:

???如果是输出4-20毫安 就2跟线吧 这个加个模拟量模块 三菱是AD

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