Hello, I have a problem trying to convert an Allen-Bradley 1769-IF4I analog input card from three wire to two wire. The three wire used a seperate wire for the 24 vdc power supply. I have a Rosemount ultrasonic that requires 24vdc to power the display. I always thought that the analog cards supplied the 24 vdc along with the 4-20 Ma sign al. Right now I am wired to ch2 with a jumper on the channel, but I do not have any display to the ultrasonic. I am not sure what I am doing wrong. Any help would be greatly appreciated.
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