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-9222/PCI-9223 card provides the grounding point for
external analog input signals and is suitable for floating signal
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-refer-
enced 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-9222/PCI-9223. 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
AIn
AIGND
n = 0, ...,63
Floating
Signal
Source
Instrumentation
Amplifier
To A/D
Converter
Input Multipexer
V1
V2
+
-
+
-
CN1
Содержание NuDAQ PCI-9222
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