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ACM versus CM on Analog input

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  • 2 weeks later...

I noticed that you did not get an answer to your question. I am assuming that you have a V200-18-e3xb type snap in module given how you asked your question.

No, ACM and CM should not be jumpered. CM is to be used only if you are using a 100 Ohm PT temperature input as where you land the 3rd wire of your RTD input. ACM is to be used for analog input commons only (0-10Vdc, 0-20ma, 4-20ma). If you were to use thermocouple inputs then you would land those on the Input + and input - terminals on the E3XB.



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  • 1 month later...

Thanks. I had given up on Unitronics. I'm actually having quite the hard time getting support. I've got a PID problem no one can seem to help me with. Will try another post. Have spoken to you guys in MA, and I'm told there is a PID "guru" in Israel, but they won't get them involved. I'm running a PID that needs to output a PWM signal to a stepper. Got the program written by a veteran programmer, but I think this might be a little beyond his experience level.

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