Connecting Differential Analog Input Signals - National Instruments BNC-2090A Quick Start Manual

Connecting Differential Analog Input Signals

BNC-2090A Quick Start Guide
Complete the following steps to measure a differential (DIFF) analog input
signal.
1. Connect the BNC cable to one of the AI <0..7> BNC connectors on the
front panel.
Do not connect anything to the corresponding AI <8..15> BNC
connector below the AI <0..7> BNC connector you use.
2. Move the corresponding SE/DIFF switch to the DIFF position. On the
BNC-2090A front panel, a line indicates which SE/DIFF switch
corresponds to each AI <0..7> BNC connector.
3. Configure your software to measure this channel differentially.
Figure 3 shows how differential AI signals are routed to the DAQ device.
SE
AI 0
DIFF
AI 8
Do Not
Connect
Figure 3. Analog Input Differential Mode
BNC-2090A
NRSE
RSE
RSE/NRSE
Switch
Not Used
4
Cable DAQ Device
AI 0
AI 8
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