JYTEK NuDAQ PCI-69222, User Manual

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Hardware Information 21
Input Configurations
Single-ended Connections
A single-ended connection is used when the analog input sig -
nal is referenced to a ground that can be shared with other
analog input signals. There are two types of single-ended con -
nections: RSE and NRSE configuration. In RSE configuration,
the PCI-69222/PCI-69223 card provides the grounding point
for external analog input signals and is suitable for floating sig -
nal sources. In NRSE configuration, the card does not provide
the grounding point. The external analog input signal provides
its own reference grounding point and is suitable for ground-
referenced signals.
Referenced Single-ended (RSE) Mode
In referenced single-ended mode, all the input signals are con -
nected to the ground provided by the PCI-69222/PCI-69223.
This mode is suitable for connections with floating signal
sources. Figure 2-2 shows an illustration of this mode. Take note that
when two or more floating sources are connected, these sources will
be referenced to the same common ground.
Figure 2-2: Floating Source and RSE Input Connections
x
AIn
AIGND
n = 0, ...,63
Floating
Signal
Source
Instrumentation
Amplifier
To A/D
Converter
Input Multipexer
V1
V2
+
-
+
-
CN1