National Instruments X Series User Manual page 241

Appendix A Device-Specific Information
Note Refer to Table 7-9,
Termination/USB BNC Device Default NI-DAQmx Counter/Timer
the default NI-DAQmx counter/timer pins for this device. For more information
about default NI-DAQmx counter inputs, refer to Connecting Counter Signals in the
NI-DAQmx Help or the LabVIEW Help.
A-34 | ni.com
X Series PCI Express/PXI Express/USB Mass
Pins, for a list of