Common Mode Range AIO
Posted: 28 Nov 2019, 18:06
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
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