Pinout and Signal Descriptions

The following figure shows the pinout of the NI USB-6008/6009. Analog input signal names are listed as single-ended analog input name, AI x, and then differential analog input name, (AI x+/-). Refer to the following table for a detailed description of each signal.

Figure 6. NI USB-6008/6009 Pinout

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Table 5. Signal Descriptions
Signal Name Reference Direction Description
GND — — Ground—The reference point for the single-ended analog input measurements, analog output voltages, digital signals, +5 VDC supply, and +2.5 VDC at the I/O connector, and the bias current return point for differential mode measurements.
AI <0..7> Varies Input Analog Input Channels 0 to 7—For single-ended measurements, each signal is an analog input voltage channel. For differential measurements, AI 0 and AI 4 are the positive and negative inputs of differential analog input channel 0. The following signal pairs also form differential input channels: AI <1, 5>, AI <2, 6>, and AI <3, 7>. Refer to the Analog Input section for more information.
AO <0, 1> GND Output Analog Output Channels 0 and 1—Supplies the voltage output of AO channel 0 or AO channel 1. Refer to the Analog Output section for more information.
P0.<0..7> GND Input or Output Port 0 Digital I/O Channels 0 to 7—You can individually configure each signal as an input or output. Refer to the Digital I/O section for more information.
P1.<0..3> GND Input or Output Port 1 Digital I/O Channels 0 to 3—You can individually configure each signal as an input or output. Refer to the Digital I/O section for more information.
PFI 0 GND Input PFI 0—This pin is configurable as either a digital trigger or an event counter input. Refer to the PFI 0 section for more information.
+2.5 V GND Output +2.5 V External Reference—Provides a reference for wrap-back testing. Refer to the +2.5 V External Reference section for more information.
+5 V GND Output +5 V Power Source—Provides +5 V power up to 200 mA. Refer to the +5 V Power Source section for more information.