Table Of Contents

C Series Signal Connections for Counters

Version:
    Last Modified: November 16, 2017

    The following tables lists the default input terminals for various counter measurements. 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.

    NI 9401, NI 9421, NI 9422, NI 9423, NI 9436, and NI 9437 (8-Channel)

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

    NI 9402 and NI 9435 (4-Channel)

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

    NI 9411 (6-Channel)

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

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

    NI 9401, NI 9472, NI 9474, NI 9475, and NI 9485 (8-Channel)

    Ctr0 Ctr1 Ctr2 Ctr3 FreqOut
    PFI 3 PFI 7 PFI 1 PFI 5 PFI 2

    NI 9481, NI 9482, and NI 9402 (4-Channel)

    Ctr0 Ctr1 Ctr2 Ctr3 FreqOut
    PFI 0 PFI 3 PFI 1 PFI 2 PFI 1

    NI 9361 (8-Counters)

    Measurement Ctr0 Ctr1 Ctr2 Ctr3 Ctr4 Ctr5 Ctr6 Ctr7
    Count Edges
    • Edges: PFI 0
    • Count Direction: PFI 7
    • Reset: PFI4
    • Edges: PFI 1
    • Count Direction: PFI 6
    • Reset: PFI5
    • Edges: PFI 2
    • Count Direction: PFI 5
    • Reset: PFI6
    • Edges: PFI 3
    • Count Direction: PFI 4
    • Reset: PFI7
    • Edges: PFI 4
    • Count Direction: PFI 3
    • Reset: PFI0
    • Edges: PFI 5
    • Count Direction: PFI 2
    • Reset: PFI1
    • Edges: PFI 6
    • Count Direction: PFI 1
    • Reset: PFI2
    • Edges: PFI 7
    • Count Direction: PFI 0
    • Reset: PFI3
    Duty Cycle Measurement PFI 0 PFI 1 PFI 2 PFI 3 PFI 4 PFI 5 PFI 6 PFI 7
    Pulse Width Measurement PFI 0 PFI 1 PFI 2 PFI 3 PFI 4 PFI 5 PFI 6 PFI 7
    Period/Frequency Measurement (Dynamic Averaging) PFI 0 PFI 1 PFI 2 PFI 3 PFI 4 PFI 5 PFI 6 PFI 7
    Position Measurement
    • A: PFI 0
    • B: PFI 4
    • Z: PFI 7
    • A: PFI 1
    • B: PFI 5
    • Z: PFI 6
    • A: PFI 2
    • B: PFI 6
    • Z: PFI 5
    • A: PFI 3
    • B: PFI 7
    • Z: PFI 4
    • A: PFI 4
    • B: PFI 0
    • Z: PFI 3
    • A: PFI 5
    • B: PFI 1
    • Z: PFI 2
    • A: PFI 6
    • B: PFI 2
    • Z: PFI 1
    • A: PFI 7
    • B: PFI 3
    • Z: PFI 0
    Velocity
    • A: PFI 0
    • B: PFI 4
    • A: PFI 1
    • B: PFI 5
    • A: PFI 2
    • B: PFI 6
    • A: PFI 3
    • B: PFI 7
    • A: PFI 4
    • B: PFI 0
    • A: PFI 5
    • B: PFI 1
    • A: PFI 6
    • B: PFI 2
    • A: PFI 7
    • B: PFI 3

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