Skiroy
Member
Hey guys were having difficulties with a flow meter that takes 24VDC PSU but sends 4-20ma output as we verified. The Compact Logix analog module says its +/- 10VDC but can see Voltage or 4-20ma. Our raw data is incorrect. When we use a 1VDC 4-20ma signal generator its raw data is as expected.
Is there a difference between 24VDC 4-20ma and 10VDC 4-20ma? Isnt 4-20ma, 4-20ma? No matter the voltage being used to the device? I could understand if we were reading voltage but not current.
It is a ABB 1769-IF4 analog module. And can anyone explain when and why would one use the the analog common on the module vs the -V/I terminal?
Is there a difference between 24VDC 4-20ma and 10VDC 4-20ma? Isnt 4-20ma, 4-20ma? No matter the voltage being used to the device? I could understand if we were reading voltage but not current.
It is a ABB 1769-IF4 analog module. And can anyone explain when and why would one use the the analog common on the module vs the -V/I terminal?