Chapter 4
Connecting the Signals
4-18
ni.com
Single-Ended Connections for Floating Signal
Sources (RSE Configuration)
Figure 4-8 shows how to connect a floating signal source to a channel
on the NI 6052E configured for RSE mode.
Figure 4-8.
Single-Ended Input Connections for Nonreferenced or Floating Signals
Single-Ended Connections for Grounded Signal
Sources (NRSE Configuration)
To measure a grounded signal source with a single-ended configuration,
you must configure the device in NRSE input mode. The signal is then
connects to the PGIA positive input, and the signal local ground reference
connects to the PGIA negative input. The ground point of the signal should,
therefore, connect to the AISENSE pin. Any potential difference between
the NI 6052E ground and the signal ground appears as a common-mode
signal at both the positive and negative inputs of the PGIA, and the
amplifier rejects this difference. If the input circuitry of the NI 6052E were
referenced to ground, as in the RSE configuration, this difference in ground
potentials appears as an error in the measured voltage.
Figure 4-9 shows how to connect a grounded signal source to a channel on
the NI 6052E configured for NRSE mode.
Selected Channel in RSE Configuration
PGIA
Input Multiplexers
–
+
–
Floating
Signal
Source
V
s
I/O Connector
AIGND
AISENSE
ACH
+
Instrumentation
Amplifier
Measured
Voltage
V
m
–
+