The tutorial How To Measure Voltage provides a good and thorough description of the different terminal configurations, and explains when to use them. For a short summary/overview continue below.
|Referenced Single Ended (RSE)|
|Non-Referenced Single Ended (NRSE) Terminal Configuration|
|Measures the potential difference between the AI+ and AI- ||Measures the potential difference between the AI and the AI GND||Measures the potential difference between the AI and the AI SENSE|
In general, it is recommended to use differential configuration when possible. Differential signal connections reduce noise pickup and avoid ground loops. The following chart summarizes ways to connect a signal source to a measurement system.
To find your device pinouts of your specific hardware, open NI Measurement and Automation Explorer (MAX) and follow the steps outlined in Where to Find NI-DAQmx Device Pinouts or Pin Mappings