National Instruments Data Acquisition Device NI USB-621x User Manual page 146

Note For more information about default NI-DAQmx counter inputs, refer to Connecting
Counter Signals in the NI-DAQmx Help or the LabVIEW Help in version 8.0 or later.
© National Instruments Corporation
Table A-3. Default NI-DAQmx Counter/Timer Pins
Counter/Timer Signal
CTR 0 SRC
CTR 0 GATE
CTR 0 AUX
CTR 0 OUT
CTR 0 A
CTR 0 Z
CTR 0 B
CTR 1 SRC
CTR 1 GATE
CTR 1 AUX
CTR 1 OUT
CTR 1 A
CTR 1 Z
CTR 1 B
FREQ OUT
A-7
Appendix A Device-Specific Information
Default Terminal Number (Name)
33 (PFI 8)
34 (PFI 9)
35 (PFI 10)
38 (PFI 12)
33 (PFI 8)
34 (PFI 9)
35 (PFI 10)
4 (PFI 3)
6 (PFI 4)
36 (PFI 11)
39 (PFI 13)
4 (PFI 3)
6 (PFI 4)
36 (PFI 11)
40 (PFI 14)
NI USB-621x User Manual