X Series Signal Connections for Counters

NI-DAQmx 18.6 Help


Edition Date: January 2019
Part Number: 370466AH-01
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NI-DAQmx 18.6 Help
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The following table lists the default input terminals for various counter measurements on X Series devices. You can use a different PFI line for any of the input terminals. To change the PFI input for a measurement, use the NI-DAQmx channel attributes/properties.

Measurement Ctr0 Ctr1 Ctr2 Ctr3
Count Edges
  • Edges: PFI 8
  • Count Direction: PFI 10
  • Edges: PFI 3
  • Count Direction: PFI 11
  • Edges: PFI 0
  • Count Direction: PFI 2
  • Edges: PFI 5
  • Count Direction: PFI 7
Pulse Width Measurement PFI 9 PFI 4 PFI 1 PFI 6
Period/Frequency Measurement (Low Frequency with One Counter) PFI 9 PFI 4 PFI 1 PFI 6
Period/Frequency Measurement (High Frequency with Two Counters) PFI 8 PFI 3 PFI 0 PFI 5
Period/Frequency Measurement (Large Range with Two Counters) PFI 8 PFI 3 PFI 0 PFI 5
Pulse Measurement PFI 9 PFI 4 PFI 1 PFI 6
Semiperiod Measurement PFI 9 PFI 4 PFI 1 PFI 6
Two-Edge Separation Measurement
  • Start: PFI 10
  • Stop: PFI 9
  • Start: PFI 11
  • Stop: PFI 4
  • Start: PFI 2
  • Stop: PFI 1
  • Start: PFI 7
  • Stop: PFI 6
Position Measurement
  • A: PFI 8
  • B: PFI 10
  • Z: PFI 9
  • A: PFI 3
  • B: PFI 11
  • Z: PFI 4
  • A: PFI 0
  • B: PFI 2
  • Z: PFI 1
  • A: PFI 5
  • B: PFI 7
  • Z: PFI 6

The following table lists the output terminals for counter output. You can use a different PFI line for any of the output terminals.

Ctr0 Ctr1 Ctr2 Ctr3
PFI 12 PFI 13 PFI 14 PFI 15

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