Using Digital I/O Terminals as Timing Input Signals

Use digital I/O terminals to route external timing signals to many different functions.

Each digital I/O terminal can be routed to any of the following signals:

  • AI Convert Clock (ai/ConvertClock)
  • AI Sample Clock (ai/SampleClock)
  • AI Sample Clock Timebase (ai/SampleClockTimebase)
  • AI Start Trigger (ai/StartTrigger)
  • AI Reference Trigger (ai/ReferenceTrigger)
  • AI Pause Trigger (ai/PauseTrigger)
  • AO Start Trigger (ao/StartTrigger)
  • AO Sample Clock (ao/SampleClock)
  • AO Sample Clock Timebase (ao/SampleClockTimebase)
  • AO Pause Trigger (ao/PauseTrigger)
  • Counter input signals for all counters—Source, Gate, Aux, HW_Arm, A, B, Z
  • Counter n Sample Clock
  • DI Sample Clock (di/SampleClock)
  • DI Sample Clock Timebase (di/SampleClockTimebase)
  • DI Reference Trigger (di/ReferenceTrigger)
  • DO Sample Clock (do/SampleClock)

Most functions allow you to configure the polarity of digital I/O inputs and whether the input is edge or level sensitive.