National Instruments USB-6008 User Manual page 11

Signal Reference
Name
GND
AI <0..7> Varies
10 | ni.com | NI USB-6008/6009 User Guide
Figure 6. NI USB-6008/6009 Pinout
GND
AI 0 (AI 0+)
AI 4 (AI 0–)
GND
AI 1 (AI 1+)
AI 5 (AI 1–)
GND
AI 2 (AI 2+)
AI 6 (AI 2–)
GND
AI 3 (AI 3+)
AI 7 (AI 3–)
GND
AO 0
AO 1
GND
Table 5. Signal Descriptions
Direction
— —
Input
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.
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
information.
P0.0
P0.1
P0.2
P0.3
P0.4
P0.5
P0.6
P0.7
P1.0
P1.1
P1.2
P1.3
PFI 0
+2.5 V
+5 V
GND
Description
section for more