National Instruments Isolated Analog Input Modules SCC-AI14 - Manual (Page 6)

SCC-AI Series Isolated Analog Input Modules 6 ni.com
Figure 1-3. SCC-AIXX Signal Connections
The inputs are designed in a floating (nonreferenced) single-ended
configuration. If the measured signals are floating, connect the negative
input pins, 1 and 3, to AISENSE on the SC-2345 terminal block through
a 10 k
Ω to 100 kΩ resistor. Figure 1-4 shows a floating signal connection
on one channel of the SCC-AIXX.
Figure 1-4. Nonreferenced Signal Connection for the SCC-AIXX (One Channel)
+
4
Lowpass
Filter
+
–
–
+
–
+
–
Lowpass
Filter
3
2
1
E Series DAQ Device Signal
Source
ACH( X )
SCC-AI XX
AISENSE
AIGND
ACH( X+8)
+
4
Lowpass
Filter
+
–
–
+
–
Lowpass
Filter
3
2
1
E Series DAQ Device
Signal
Source
ACH( X )
SCC-AI XX
AISENSE
AIGND
ACH( X+8)
AISENSE
on SC-2345
terminal block
10 –100 k Ω