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Old December 2nd, 2019, 11:52 AM   #6
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Join Date: Mar 2005
Location: ENE of Nowhere Oklahoma
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The 4-20mA signal can easily be run that far, but I would still use at least 18awg wire size, because the theoretical distance and quality of termination are never exactly by the book.

I would also recommend signal isolators at the PLC end to protect the analog inputs from spikes/surges especially if the remotes are in separate buildings.

I was hesitant to respond due to the confusion I got from your side note. I am not sure what to think of this:

Side Note: I will get all the current flowing back to the Remote Box correct? So in other words, if I have 4 signals running at 10mA I will get 40mA returned to the Remote Box. Whether it is on 1 wire or spread across multiple wires. Correct?
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