©
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–
Channel
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
S
ignal
S
ource
+
–
+
–
AI+
AI–
AI GND
Floating
S
ignal
S
ource
R
b
R
b
R
b
= 100 k
Ω
– 1 M
Ω