NI-9207 Not Reading Voltage Correctly

Updated Jan 16, 2020

Reported In

Hardware

  • NI-9207

Issue Details

I'm using a NI-9207 to read in sensor data. When I check the voltage with my digital multi-meter (DMM), I see the voltage is an expected value. However the NI-9207 is reading a lower voltage than expected. My device gives a differential signal. 

Solution

Devices which have differential signals require a 1 MΩ Resistor connected to the COM port. 



See the NI 9207 Getting Started Guide for more detail.