National Instruments Data Acquisition Device E Series - Manual (Page 163)

Appendix A Device-Specific Information
E Series User Manual A-28 ni.com
Single-Ended Signals
For each BNC connector that you use for two single-ended channels, set the
source type switch to the GS position. This setting disconnects the built-in
ground reference resistor from the negative terminal of the BNC connector,
allowing the connector to be used as a single-ended channel, as shown in
Figure A-25.
Figure A-25. BNC Single-Ended Signals
When you set the source type to the GS position and software-configure the
device for single-ended input, each BNC connector provides access to two
single-ended channels, AI x and AI x+8. For example, the BNC connector
labeled AI 0 provides access to single-ended channels AI 0 and AI 8, the
BNC connector labeled AI 1 provides access to single-ended channels AI 1
and AI 9, and so on. Up to 16 single-ended channels are available in
single-ended measurement modes.
For a detailed description of each signal, refer to the I/O Connector Signal
Descriptions section of Chapter 1, DAQ System Overview .
Analog Output
You can access analog output signals on the BNC connectors labeled AO 0
and AO 1. Figure A-26 shows the analog output circuitry on BNC
DAQPads.
Figure A-26. Analog Output
AI x + 8
AI x
GS
0.1 µF 5 k Ω
AI GND
FS
AO
AO GND