National Instruments Data Acquisition Device E Series - Manual (Page 209)

Appendix A Device-Specific Information
E Series User Manual A-74 ni.com
Refer to the Connecting Analog Output Signals section of Chapter 3,
Analog Output , for more information.
AO External Reference
The AO EXT REF input controls the voltage range of analog output signals.
Figure A-61 shows circuitry of the AO EXT REF on BNC DAQPads.
Figure A-61. AO EXT REF
Refer to the Reference Selection section of Chapter 3, Analog Output , for
more information.
Counter 0 Out and PFI 0/AI Start Trigger
You can access the Counter 0 Out and PFI 0/AI Start Trigger signals
through their respective pins on BNC DAQPads, as shown in Figure A-62
and Figure A-63. Refer to the
Counter 0 Internal Output Signal section of
Chapter 5, Counters , for more information on counter signals. Refer to
Chapter 6, Programmable Function Interfaces (PFI) , for more information
on programmable function interface signals. Refer to the AI Start Trigger
Signal section of Chapter 2, Analog Input , for more information.
Figure A-62. Counter 0 Out
Figure A-63. PFI 0/AI Start Trigger
AO EXT REF
AI GND
CTR 0 OUT
D GND
PFI 0/AI START TRIG
D GND