National Instruments USB-621 Series User Manual page 163

© National Instruments Corporation
When you set the source type to the GS position and configure the
device for single-ended input in software, 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 information on how to connect your signals in single-ended mode,
AI GND, and/or AI SENSE, refer to the
Signals on USB-6210/6211/6212 Devices
Signals on USB-6215/6216/6218 Devices
Analog Input. For a detailed description of each signal, refer to the
I/O Connector Signal Descriptions
and LED Information.
Analog Output
You can access analog output signals on the BNC connectors labeled AO 0
and AO 1. Figure A-9 shows the analog output circuitry on the
USB-6212/6216 BNC.
Figure A-9. Analog Output Circuitry
Refer to the Connecting Analog Output Signals
Analog Output, for more information.
Digital I/O and Timing I/O
You can access digital I/O and timing I/O signals on the BNC connectors
labeled PFI <0..7>/P1.<0..7>. Figure A-10 shows the DIO/TIO circuitry on
the USB-6212/6216 BNC.
Figure A-10. Digital I/O and Timing I/O Circuitry
Appendix A
section of Chapter 3,
AO x
AO GND
PFI x/P1.x
D GND
A-17
Device-Specific Information
Connecting Analog Input
Connecting Analog Input
or
section of Chapter 4,
Connector
section of Chapter 5,
NI USB-621x User Manual