Chapter 4 Analog Input
© National Instruments 4-19 X Series User Manual
connection is made remotely near the source. However, the noise rejection
of NRSE mode is worse than DIFF mode because the AI SENSE
connection is shared with all channels rather than being cabled in a twisted
pair with the AI+ signal.
Using the DAQ Assistant, you can configure the channels for RSE or NRSE
input modes. Refer to the Configuring AI Ground-Reference Settings in
Software section for more information about the DAQ Assistant.
Using Referenced Single-Ended (RSE) Connections
for Floating Signal Sources
Figure 4-9 shows how to connect a floating signal source to the MIO
X Series device configured for RSE mode.
Figure 4-9. RSE Connections for Floating Signal Sources
Using the DAQ Assistant, you can configure the channels for RSE or NRSE
input modes. Refer to the Configuring AI Ground-Reference Settings in
Software section for more information about the DAQ Assistant.
Selected Channel in RSE Configuration
PGIA
Input Multiplexers
–
+
–
Floating
Signal
Source
V
s
I/O Connector
AI GND
AI SENSE
AI <0..31>
+
Programmable Gain
Instrumentation
Amplifier
Measured
Voltage
V
m
–
+
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