I am looking at some 4-20mA Wago analog input cards. They have 2 varieties, and I am not sure of when to use one version over the other.
One version has 0V ran from the analog input card to the sensor, and then returns back to the input on the analog input card.
https://www.wago.com/us/controllers-bus-couplers-i-o/4-channel-analog-input/p/750-455
The other version runs 24V out to the sensor from the analog input card, and then returns back to the input:
https://www.wago.com/us/controllers-bus-couplers-i-o/4-channel-analog-input/p/750-455_020-000
Struggling to find some traction on deciding when to use one over the other. I understand "single ended", but both are single-ended....when would one use the 24V version and when to use the 0V version?
One version has 0V ran from the analog input card to the sensor, and then returns back to the input on the analog input card.
https://www.wago.com/us/controllers-bus-couplers-i-o/4-channel-analog-input/p/750-455
The other version runs 24V out to the sensor from the analog input card, and then returns back to the input:
https://www.wago.com/us/controllers-bus-couplers-i-o/4-channel-analog-input/p/750-455_020-000
Struggling to find some traction on deciding when to use one over the other. I understand "single ended", but both are single-ended....when would one use the 24V version and when to use the 0V version?