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Appendix A
Module/Device-Specific Information
Counter/Timer Signal
CTR 0 SRC
CTR 0 GATE
CTR 0 AUX
CTR 0 OUT
CTR 1 SRC
CTR 1 GATE
CTR 1 AUX
CTR 1 OUT
FREQ OUT
Note
For a detailed description of each signal, refer to the
Descriptions
Note
For more information about default NI-DAQmx counter inputs, refer to
Connecting Counter Signals in the NI-DAQmx Help or the LabVIEW Help.
USB-6251 BNC Important Links
The following list contains links specific to your DAQ device:
•
Specifications—Refer to the NI 6251 Specifications for more detailed information about
the USB-6251 BNC device.
LED Patterns—Refer to the
•
Information, for information about the USB-6251 BNC LEDs.
Fuse Replacement—Refer to the
•
Getting
Started, for information about replacing the fuse on the USB-6251 BNC.
Accessory Options—Refer to the
•
section of Chapter 2,
A-34 | ni.com
Table A-16. Default NI-DAQmx Counter/Timer Pins
CTR 0 A
CTR 0 Z
CTR 0 B
CTR 1 A
CTR 1 Z
CTR 1 B
section of Chapter 3,
LED Patterns
USB Device Accessories, USB Cable, and Power Supply
DAQ System
Connector and LED
section of Chapter 3,
USB Device Fuse Replacement
Overview, for more information.
Default Pin Name
PFI 8
PFI 9
PFI 10
PFI 12
PFI 8
PFI 9
PFI 10
PFI 3
PFI 4
PFI 11
PFI 13
PFI 3
PFI 4
PFI 11
PFI 14
I/O Connector Signal
Information.
Connector and LED
section of Chapter 1,
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