© National Instruments Corporation 27 NI sbRIO-961x/9612XT/963x/9632XT/964x/9642XT
Figure 18 shows how to make a differential connection for a floating signal
and for a ground-referenced signal.
Figure 18. Differential Analog Input Connection
Table 4. Differential Pairs
Channel Signal+ Signal– Channel Signal+ Signal–
0 AI0 AI8 16 AI16 AI24
1 AI1 AI9 17 AI17 AI25
2 AI2 AI10 18 AI18 AI26
3 AI3 AI11 19 AI19 AI27
4 AI4 AI12 20 AI20 AI28
5 AI5 AI13 21 AI21 AI29
6 AI6 AI14 22 AI22 AI30
7 AI7 AI15 23 AI23 AI31
+
–
+
–
AI+
AI–
AI GND
Grounded
Signal Source
+
–
+
–
AI+
AI–
AI GND
Floating
Signal Source
R
b
R
b
R
b
= 100 kΩ –1 MΩ
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