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NI USB-9229/9239 User Guide and Specifications 10 ni.com
source to the AI– terminal. Refer to Table 3 for the terminal assignments
for each channel.
Wiring for High-Vibration Applications
If an application is subject to high vibration, National Instruments
recommends that you either use ferrules to terminate wires to the
detachable screw-terminal connector or use the NI 9971 backshell
kit to protect the connections. Refer to Figure 7 for an illustration.
Figure 7. 2-Terminal Detachable Screw-Terminal Connector with Ferrule
Table 3. Terminal Assignments
Module Channel Terminal Signal
0
0+ AI0+
0– AI0–
1
1+ AI1+
1– AI1–
2
2+ AI2+
2– AI2–
3
3+ AI3+
3– AI3–
1+
1-
0+
0-
2+
2-
3+
3-
Ch 0
Ch 1
Ch 2
Ch 3