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Chapter 4 Signal Connections
VXI-MIO Series User Manual 4-20
National Instruments Corporation
Figure 4-7.
Single-Ended Input Connections for Ground-Referenced Signal
Common-Mode Signal Rejection Considerations
Figures 4-6 and 4-7 show connections for signal sources that are
already referenced to some ground point with respect to the
VXI-MIO Series module. In these cases, the PGIA can reject any
voltage caused by ground potential differences between the signal
source and the module. In addition, with differential input connections,
the PGIA can reject common-mode noise pickup in the leads connecting
the signal sources to the module. The PGIA can reject common-mode
signals as long as V
+
in
and V
-
in
are both within
±
11 V of AIGND
.
Analog Output Signal Connections
The analog output signals are DAC0OUT, DAC1OUT, EXTREF, and
AOGND.
EXTREF is not available on the VXI-MIO-64XE-10
.
DAC0OUT is the voltage output signal for analog output channel 0.
DAC1OUT is the voltage output signal for analog output channel 1.
EXTREF is the external reference input signal for both analog output
channels. You must configure each analog output channel individually
for external reference selection in order for the signal applied at the
V
s
+
+
+
-
-
-
V
m
Measured
Voltage
ACH<0..15>
AIGND
Instrumentation
Amplifier
I/O Connector
AISENSE
V
cm
+
-
Selected Channel in NRSE Configuration
Common-
Mode
Noise
and Ground
Potential
Ground-
Referenced
Signal
Source
PGIA
Input Multiplexers