4-20mA 4 Wire Current Source Wiring to an Allen Bradley PLC Input

How to wire a 4-20mA 4 Wire device to an Allen Bradley Compactlogix PLC, most other PLCs will be the same. This is the easier of the two 4-20 mA circuits to understand. In our previous lesson, we talked about the difference between a 2 wire current loop and a 4 wire current source. Once you know that you need a 4 wire circuit, or a 3 wire, then this is how you wire it to a typical PLC input.

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Items used in this video:
PLC Tools SIM-ALP2 Analog Simulator https://controls.tw/yt-sim-alp2
PLC Trainer https://controls.tw/yt-plc-trainers

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