Table Of Contents

USB-6218 Screw Terminal Pinout

Version:
    Last Modified: September 18, 2017

    Table 1. Default Counter/Timer Terminals
    Counter/Timer Signal Default PFI Terminal
    CTR 0 SRC PFI 0
    CTR 0 GATE PFI 1
    CTR 0 AUX PFI 9
    CTR 0 OUT PFI 4
    CTR 0 A PFI 0
    CTR 0 Z PFI 1
    CTR 0 B PFI 9
    CTR 1 SRC PFI 3
    CTR 1 GATE PFI 2
    CTR 1 AUX PFI 10
    CTR 1 OUT PFI 5
    CTR 1 A PFI 3
    CTR 1 Z PFI 2
    CTR 1 B PFI 10
    FREQ OUT PFI 6
    Table 2. Signal Descriptions
    Signal Reference Description

    AI GND

    Analog Input Ground—These terminals are the reference point for single-ended AI measurements in RSE mode and the bias current return point for DIFF measurements. All ground references—AI GND, AO GND, and D GND—are connected on the device.

    AI <0..31>

    Varies

    Analog Input ChannelsFor single-ended measurements, each signal is an analog input voltage channel. In RSE mode, AI GND is the reference for these signals. In NRSE mode, the reference for each AI signal is an AI SENSE.

    For differential measurements, AI 0 and AI 8 are the positive and negative inputs of differential analog input channel 0. Similarly, the following signal pairs also form differential input channels: AI <1,9>, AI <2,10>, and so on.

    AI SENSE

    Analog Input Sense—In NRSE mode, the reference for each AI <0..31> signal is AI SENSE.

    AO <0,1>

    AO GND

    Analog Output Channels—These terminals supply voltage output.

    AO GND

    Analog Output GroundAO GND is the reference for AO. All ground references—AI GND, AO GND, and D GND—are connected on the device.

    D GND

    Digital GroundD GND supplies the reference for port 0, port 1 digital channels, PFI, and +5 V. All ground references—AI GND, AO GND, and D GND—are connected on the device.

    +5 V

    D GND

    +5 V Power Source—These terminals provide a +5 V power source or can be used to externally power the digital outputs.

    PFI <0..3>/P0.<0..3>, PFI <8..11>/P0.<4..7>

    D GND

    Programmable Function Interface or Static Digital Input ChannelsEach PFI terminal can be used to supply an external source for AI, AO, or counter/timer inputs. You also can use these terminals as static digital input lines.

    PFI <4..7>/P1.<0..3>, PFI <12..15>/P1.<4..7>

    D GND

    Programmable Function Interface or Static Digital Output ChannelsYou can route many different internal AI, AO, or counter/timer outputs to each PFI terminal. You also can use these terminals as static digital output lines.

    NC

    No connect—Do not connect signals to this terminal.

    Table 3. LED State/Device Status
    POWER/ACT Device Status
    Off Device is not powered or device error. Refer to ni.com/support if device is powered.
    On Device error. Refer to ni.com/support.
    Single-blink Device operating normally. Device connected to USB Hi-Speed port.
    Double-blink Device connected to USB Full-Speed port. Device performance might be affected.

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