User manual

Appendix A Device-Specific Information

E Series User Manual A-14 ni.com

Figure A-8. BNC DAQPad Analog Input Circuitry

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-9.

Figure A-9. BNC DACPads Single-Ended Connections

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.

–

0.1 µF

5 kΩ

AI GND

+ 8

0.1 µF

5 kΩ

AI GND