I have a SLC 500 PLC with NI4 analog input card. I am using two 4-20mA signal coming from an RTD transmitter. The overall length of the cable is around 20ft. I have very limited knowledge in grounding and shielding. In my understanding, voltage signals are more susceptable to interference than current signals. So I am not sure if we need a shielded cable for this signal..
Please let me know what I should do.. Any documentation on basics of grounding/shielding would be helpful too..
Thanks for your time!
Please let me know what I should do.. Any documentation on basics of grounding/shielding would be helpful too..
Thanks for your time!