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© National Instruments Corporation 5 SCC-LP Series Lowpass Filter Modules User Guide
The signal source can be floating or ground-referenced. The SCC-LPXX
input circuitry includes high-impedance bias resistors typically required for
floating sources. Therefore, floating signal sources do not require external
bias resistors connected to ground.
Note For floating signal sources in high-noise environments, connect the negative
terminal of the signal source to the AI GND terminal on the SC-2345 screw-terminal block
to reduce common-mode noise.
Figure 1. SCC-LPXX Signal Connections
For information about configuring the SCC-LPXX module using
NI-DAQmx, refer to the SCC Quick Start Guide.
AI (X )
AI (X+8)
SCC-LP
+
–
E Series DAQ Device
+
–
+
–
+
–
Signal source may be floating or ground-referenced.
10 MΩ
10 MΩ
AI SENSE
1
3
4
2
AI GND
Fourth-Order
Butterworth
Lowpass
Filter
1 kΩ
1 kΩ
1 kΩ
1 kΩ
Fourth-Order
Butterworth
Lowpass
Filter
Signal
Sources