Can anyone offer a little assistance to make sure I wire a pressure transducer to the PR55-48 correctly. Wiring diagram for the transducer and the PR55-48 with M12 connector are shown below. I think the Grey, 16V supply should be connected to the + terminal of the transducer, but I’m not sure about the - terminal of the transducer… just connected to Black, ground? @Anil_Bhaskar
@Anil_Bhaskar, I wanted to revisit this question. I wired the gauge with just the Blue and Black wires, and get a reading of 7.2mA with no change in current as pressure goes up or down. In the wiring diagram provided by the pressure gauge, it does say that 10-35V is necessary to supply for the correct operation. Can I use the Gray (5), 16V Supply to power the gauge? I’m not sure how I would wire the M12 connection in that case. Gray to + on the gauge, and then…?
I did try swapping Blue for Brown, and the reading was 0.5mA, but again didn’t change with voltage. Swapping the polarity with Blue/Black didn’t change the reading.
The specs on PR55-48 say that 16V is available to power external 4-20mA devices. Why would it not work?
I don’t see any documentation on the gauge regarding boot time. This is a new gauge, and is supposed to be factory calibrated so zero pressure is 4mA. I’m not sure why when pressure is applied the device isn’t picking it up.
OK, I had to try a different multimeter, but with a 12V bench top supply putting 12V or 16V to the + connection, and a multimeter in series with the - connection, the meter is reading about 4.25mA and when I apply pressure it predictably goes up to ~20mA.
With the NCD device connected to + with the BLUE wire, and the multimeter in series with the - and BLACK wire, during a sampling I am reading two spikes, one around 6mA and then another briefly after that gets max’s at 8.83mA. But neither mA spike seems to change with pressure applied.
