NI-9753 differential digital cRIO module - not generating output

[Chris_12345]

We would like to generate differential digital signals using a NI-9753 differential digital cRIO module. We have installed the Powertrain download

http://www.ni.com/gate/gb/GB_EVALTLKTPOWERTRAINDD/US

and tried writing a very simple FPGA VI to set an output on or off. Pin 19 (BATT) and pin 18 (GND) are wired with the correct polarity to a 24 VDC source. Pin 2 (DIO0a) and pin 20 (GND) are wired to an oscilloscope.

Despite manually changing the state of Channel 1, there isn't any change to the signal output from the NI 9753 on pin 2.

What am I doing wrong?

[jprazak]

Following up on Chris' post since I took over this troubleshooting effort for him. We attempted to toggle the output on all 8 channels using the GND pin as a common reference. We ran the FPGA vi in interactive execution to manually toggle the output and were not successful.