Table of Contents
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Chapter 3
Connecting the Signals
Grounded
Signal
V
s
Source
Common-Mode
Noise,
V
cm
Ground
Potential
Front I/O Connector
DAQCard-1200 User Manual
Differential Connections for Grounded Signal Sources
Figure 3-4 shows how to connect a ground-referenced signal source to a
DAQCard-1200 configured for DIFF input mode. Refer to the
Analog Input
section of Chapter 2,
the
DAQCard-1200, for configuration instructions.
1
ACH 0
3
ACH 2
5
ACH 4
+
7
ACH 6
–
2
ACH 1
4
ACH 3
+
6
ACH 5
–
8
ACH 7
11
AGND
DAQCard-1200 in DIFF Configuration
Figure 3-4. Differential Input Connections for Grounded Signal Sources
With this connection type, the instrumentation amplifier rejects both the
common-mode noise in the signal and the ground-potential difference
between the signal source and the DAQCard-1200 ground, which is shown
as V
in Figure 3-4.
cm
Installing and Configuring
+
–
3-10
Configuring
+
Measured
V
m
Voltage
–
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