Bus-Powered M Series Signal Connections for Counters

NI-DAQmx 18.6 Help


Edition Date: January 2019
Part Number: 370466AH-01
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The following table lists the default input terminals for various counter measurements on bus-powered M 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.

16-PFI Line Devices (NI 6218)

Count Edges Edges: PFI 0 Count Direction: PFI 9 Edges: PFI 3 Count Direction: PFI 10
Pulse Width Measurement PFI 1 PFI 2
Period/Frequency Measurement (Low Frequency with One Counter) PFI 1 PFI 2
Period/Frequency Measurement (High Frequency with Two Counters) PFI 0 PFI 3
Period/Frequency Measurement (Large Range with Two Counters) PFI 0 PFI 3
Semiperiod Measurement PFI 1 PFI 2
Two-Edge Separation Measurement
  • Start: PFI 9
  • Stop: PFI 1
  • Start: PFI 10
  • Stop: PFI 2
Position Measurement
  • A: PFI 0
  • B: PFI
  • Z: PFI 1
  • A: PFI 3
  • B: PFI 10
  • Z: PFI 2

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
PFI 4 PFI 5

16-PFI Line Devices (NI 6212/6216)

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

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
PFI 12 PFI 13

8-PFI Line Devices (Such as the NI 6210/6211/6215)

Measurement Ctr0 Ctr1

Count Edges

  • Edges: PFI 0
  • Count Direction: PFI 0
  • Edges: PFI 3
  • Count Direction: PFI 3
Pulse Width Measurement PFI 1 PFI 2
Period/Frequency Measurement (Low Frequency with One Counter) PFI 1 PFI 2
Period/Frequency Measurement (High Frequency with Two Counters) PFI 0 PFI 3
Period/Frequency Measurement (Large Range with Two Counters) PFI 0 PFI 3
Semiperiod Measurement PFI 1 PFI 2
Two-Edge Separation Measurement
  • Start: PFI 0
  • Stop: PFI 1
  • Start: PFI 3
  • Stop: PFI 2
Position Measurement
  • A: PFI 0
  • B: PFI 1
  • Z: PFI 2
  • A: PFI 3
  • B: PFI 2
  • Z: PFI 1

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
PFI 4 PFI 5

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