National Instruments Data Acquisition Device NI USB-621x - Manual (Page 144)

Appendix A Device-Specific Information
© National Instruments Corporation A-5 NI USB-621x User Manual
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.
Table A-2. Default NI-DAQmx Counter/Timer Pins
Counter/Timer Signal Default Terminal Number (Name)
CTR 0 SRC 1 (PFI 0)
CTR 0 GATE 2 (PFI 1)
CTR 0 AUX 1 (PFI 0)
CTR 0 OUT 6 (PFI 4)
CTR 0 A 1 (PFI 0)
CTR 0 Z 3 (PFI 2)
CTR 0 B 2 (PFI 1)
CTR 1 SRC 4 (PFI 3)
CTR 1 GATE 3 (PFI 2)
CTR 1 AUX 4 (PFI 3)
CTR 1 OUT 7 (PFI 5)
CTR 1 A 4 (PFI 3)
CTR 1 Z 2 (PFI 1)
CTR 1 B 3 (PFI 2)
FREQ OUT 8 (PFI 6)