Control

RS485 Serial comm via Field analog box wiring

M

Thread Starter

Milton

Have a situation, of running approximatly 2000' of cable/conduit to connect RS485 serial between a remote PLC and a DCS. Is there any possibility of failure if I choose to use the local existing Field Analog box already connected between the two locations with multipair instrument cable? I've been wanted to suggest this as a cost saving idea, but I'm not sure if there is any risk involved. And by the way I have used dedicated multipair instr cable for this purpose, but never mixed with analogs.

Thanks in advance for your time and advice.
 
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