Figure 4-3. Summary Of Analog Input Connections - National Instruments VXI-MIO Series User Manual

Input
Differential
(DIFF)
Referenced
Single-Ended
Ground
(RSE)
Nonreferenced
Single-Ended
(NRSE)
National Instruments Corporation
Figure 4-3 summarizes the recommended input configuration for both
types of signal sources.
Floating Signal Source
(Not Connected to Earth Ground)
Examples
• Ungrounded thermocouples
• Signal conditioning with isolated outputs
• Battery devices
ACH(+)
+
V
1
ACH (-)
-
R
AIGND
See text for information on bias resistors.
ACH
+
V
1
AIGND
-
ACH
+
V
1
AISENSE
-
See text for information on bias resistors.

Figure 4-3. Summary of Analog Input Connections

Signal Source Type
+
+
V
-
-
+
+
-
-
Ground-loop losses, V
measured signal
+
+
-
-
R
AIGND
4-13
Chapter 4 Signal Connections
Grounded Signal Source
Examples
• Plug-in instruments with
nonisolated outputs
ACH(+)
+
1
ACH (-)
-
AIGND
NOT RECOMMENDED
ACH
V
1
+ V -
g
, are added to
g
ACH
+
V
1
AISENSE
-
AIGND
VXI-MIO Series User Manual
+
-