What is Marshalling Cabinet?
This marshalling cabinet function is to interface the incoming field cable (which is normally a multipair cable) and the I/O (Input/Output) card connection....
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PLC Digital Signals Wiring Techniques
Ina process plant, on/off control is done through the PLC or DCS. The below Figure is an overview of one discrete/digital (on/off) circuit, showing the entire process from the power supply...