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MODBUS/Power Wiring
Can the power supply wires and the MODBUS communication wires be a part of the same multi-pair cable?

First time wiring for MODBUS. Can the power supply wires and the MODBUS communication wires be apart of the same multi-pair cable?

Sure, an unused twisted pair can be used to transfer the DC Voltage required by the Modbus modules.

I have used a simple multi-pair twisted shielded instrument cable for this.