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Common Mode Range AIO

Posted: 28 Nov 2019, 18:06
by RR4711
Since the 4 analog inputs share hardware on the AIO module, is there any statement on common mode voltage for the 4 inputs?

I understand the inputs are differential but what if they share a ground externally?

Example: I would for instance use one channel to measure a voltage at a DC load (e.g. a small motor) and with a 2nd channel i try to make a high side indirect current measurement by measuring the voltage drop over a shunt in the loads plus line?

What is the maximum voltage before I introduce errors or even destroy parts?

Markus

Re: Common Mode Range AIO

Posted: 14 Jan 2020, 14:16
by dirk
Hi Markus, it is 45 Volts.

Re: Common Mode Range AIO

Posted: 14 Jan 2020, 14:17
by RR4711
Thanks. Maybe something for putting into the datasheet (I couldn't find the info there)