Differential Connections For Ground-Referenced Signal Sources; Figure 4-6. Differential Input Connections For Ground-Referenced Signals - National Instruments AT-MIO/AI E Series User Manual

Ground-
Referenced
+
Signal
V
s
Source
-
Common-
Mode
+
Noise and
V
cm
Ground
-
Potential
I/O Connector
National Instruments Corporation
Differential Connections for Ground-Referenced
Signal Sources
Figure 4-6 shows how to connect a ground-referenced signal source to
an AT E Series board channel configured in DIFF input mode.
ACH<0..7>
ACH<8..15>
Input Multiplexers
AISENSE
AIGND
Selected Channel in DIFF Configuration

Figure 4-6. Differential Input Connections for Ground-Referenced Signals

With this type of connection, the PGIA rejects both the common-mode
noise in the signal and the ground potential difference between the
signal source and the AT E Series board ground, shown as V
Figure 4-6.
4-21
Chapter 4 Signal Connections
Instrumentation
Amplifier
+
PGIA
+
Measured
- V
m
Voltage
-
cm
AT-MIO/AI E Series User Manual
in