© National Instruments Corporation 3 NI cDAQ-9172 User Guide and Specifications
Counter Timing Signals...................................................................63
Counter n Source Signal...........................................................64
Counter n Gate Signal...............................................................65
Counter n Aux Signal...............................................................65
Counter n A, Counter n B, and Counter n Z Signals................ 66
Counter n Up_Down Signal..................................................... 66
Counter n HW Arm Signal.......................................................66
Counter n Internal Output and Counter n TC Signals.............. 67
Frequency Output Signal..........................................................67
Default Counter/Timer Routing.......................................................68
Counter Triggering.......................................................................... 68
Other Counter Features....................................................................69
Cascading Counters.................................................................. 69
Counter Filters..........................................................................69
Prescaling..................................................................................70
Duplicate Count Prevention......................................................71
Synchronization Modes............................................................73
Digital Routing and Clock Generation....................................................75
Clock Routing..................................................................................76
80MHz Timebase .................................................................... 76
20MHz Timebase .................................................................... 76
100kHz Timebase ....................................................................76
Specifications..........................................................................................77
Analog Input....................................................................................77
Analog Output..................................................................................77
Digital Waveform Characteristics (Slots 1 through 4 Only) ...........78
PFI Characteristics (Slots 5 and 6 Only)......................................... 78
General-Purpose Counter/Timers (Slots 5 and 6 Only)...................79
Frequency Generator (Slots 5 and 6 Only)......................................80
External Digital Triggers (Slots 5 and 6 or with Some
AI Modules)..................................................................................80
Module I/O States............................................................................80
Power Requirements........................................................................80
Bus Interface....................................................................................81
Physical Characteristics...................................................................81
Safety...............................................................................................81
Environmental..................................................................................82
Shock and Vibration........................................................................82
Electromagnetic Compatibility........................................................83
CE Compliance................................................................................83
Environmental Management............................................................83
Where to Go for Support.........................................................................84