I have a problem for getting the 4-20mA input via 1769-IF8 I/O module. My field device is in good condition, but my AI card doesn’t respond. When I have been browsing about it, most of them said, the impedance of the field device and AI module are not matched.
I don’t have any idea about how to match the impedance of both,explain to me how should match the impedance successfully?