Table 16. Differential Analog Input Signals (Continued)
Channel
Signal -
2
AI2
AI10
3
AI3
AI11
4
AI4
AI12
5
AI5
AI13
6
AI6
AI14
7
AI7
AI15
The following figure shows how to make a differential connection for a floating signal and for
a ground-referenced signal.
Figure 25. Differential Connections with Floating and Grounded Signal Sources
+
–
R
D
R
D
+
–
RD = 100 kΩ – 1 M
Ω
AI+
AI–
AI GND
Floating
Signal Source
+
–
+
–
AI+
AI–
AI GND
Grounded
Signal Source
Connecting Analog Input Signals
The following table summarizes the recommended input configuration for both types of signal
sources.
32
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