Chapter 3
Connecting Signals
SCB-68 Shielded Connector Block User Manual
3-10
ni.com
Figure 3-5 shows how to connect a grounded signal source to a channel on
the DAQ device configured for NRSE input mode.
Figure 3-5.
Single-Ended Input Connections for Ground-Referenced Signals
Connecting Analog Output Signals
When using the SCB-68 with a 68-pin or 100-pin DAQ device, the AO
signals are DAC0OUT, DAC1OUT, EXTREF, and AOGND. DAC0OUT
is the voltage output channel for AO channel 0. DAC1OUT is the voltage
output channel for AO channel 1. EXTREF is the external reference input
for both AO channels. AOGND is the ground reference signal for both AO
channels and the external reference signal.
Note
For more information, refer to the device user manual at
ni.com/manuals
for
detailed signal connection information for AO signals.
Common-
Mode
Noise
and Ground
Potential
Ground-
Referenced
Signal
Source
PGIA
–
+
–
+
V
s
V
cm
I/O Connector
AIGND
AISENSE*
–
+
Instrumentation
Amplifier
Measured
Voltage
V
m
–
+
Measurement Device Configured in NRSE Input Mode
*Not all devices support NRSE input mode.
ACH
