What is Marshalling Cabinet ?
As discussed in the Typical Architecture of Instrumentation and Automation System, the automation architecture of the plant is having a marshalling cabinet in between the junction box and the system cabinet....
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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...