Figure 4-4. Summary Of Analog Input Connections - National Instruments DAQ PCI E Series User Manual

Input
Differential
(DIFF)
Single-Ended —
Ground
Referenced
(RSE)
Single-Ended —
Nonreferenced
(NRSE)
© National Instruments Corporation
Figure 4-4 summarizes the recommended input configuration for both
types of signal sources.
Floating Signal Source
(Not Connected to Building 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
-
R
See text for information on bias resistors.

Figure 4-4. Summary of Analog Input Connections

Signal Source Type
+
+
V
1
-
-
+
+
V
-
-
Ground-loop losses, V
measured signal
+
+
V
-
-
AIGND
4-15
Chapter 4 Signal Connections
Grounded Signal Source
Examples
• Plug-in instruments with
nonisolated outputs
ACH(+)
+
ACH (-)
-
AIGND
NOT RECOMMENDED
ACH
1
+ V -
g
, are added to
g
ACH
1
AISENSE
AIGND
PCI E Series User Manual
+
-
+
-