User manual

Chapter 4 Connecting Signals
NI 6034E/6035E/6036E User Manual 4-10 ni.com
Figure 4-3. Summary of Analog Input Connections
Input
Input
Floating Signal Source
(Not Connected to Building Ground)
Grounded Signal Source
Differential
(DIFF)
Single-Ended —
Ground
Referenced
(RSE)
Single-Ended —
Nonreferenced
(NRSE)
See text for information on bias resistors.
Not Recommended
Ground-loop losses, V
g
, are added to
the measured signal.
See text for information on bias resistors.
Examples
• Underground Thermocouples
• Signal Conditioning with
Isolated Outputs
• Battery Devices
Example
• Plug-in Instruments with Nonisolated
Outputs
ACH(+)
ACH(–)
+
–
+
–
R
AIGND
V
1
ACH(+)
AIGND
+
–
+
–
V
1
ACH
AISENSE
AIGND
AIGND
R
+
–
+
–
V
1
ACH
AISENSE
+
–
+
–
V
1
ACH
+
–
+
–
V
1
+
–
V
g
ACH(+)
ACH(–)
+
–
+
–
AIGND
V
1
UM.book Page 10 Monday, May 14, 2001 10:32 AM