National Instruments NI 6238 - Manual (Page 67)

Chapter 7 Counters
NI 6238/6239 User Manual 7-2 ni.com
Figure 7-1. M Series Counters
The counters have seven input signals, although in most applications only
a few inputs are used.
For information on connecting counter signals, refer to the Default Counter
Terminals section.
Counter 0
Counter 0 Source (Counter 0 Timebase)
Counter 0 Aux
Counter 0 HW Arm
Counter 0 A
Counter 0 B (Counter 0 Up_Down)
Counter 0 Z
Counter 0 Gate
Counter 0 Internal Output
Counter 0 TC
Input Selection Muxes
Frequency Generator
Frequency Output Timebase Freq Out
Input Selection Muxes
Counter 1
Counter 1 Source (Counter 1 Timebase)
Counter 1 Aux
Counter 1 HW Arm
Counter 1 A
Counter 1 B (Counter 1 Up_Down)
Counter 1 Z
Counter 1 Gate
Counter 0 Internal Output
Counter 0 TC
Input Selection Muxes