National Instruments NI 7831R - Manual (Page 27)

Chapter 2 Hardware Overview of the NI 7831R
NI 7831R User Manual 2-8 ni.com
Figure 2-5. Summary of Analog Input Connections
+
–
+
–
V
1
AI< i>
AISENSE
AIGND< i>
+
–
+
–
V
1
AI< i>
AISENSE
AIGND< i>
See text for information on bias resistors.
+
–
+
–
V
1
AI< i>
AIGND< i>
+
–
+
–
V
1
AI
+ V g –
AIGND
Ground-loop losses, V
g
, are added to
measured signal.
NOT RECOMMENDED
+
–
+
–
V
1
AI< i>(+)
AI< i>(–)
AIGND< i>
+
–
+
–
V
1
AI< i>(+)
AI< i>(–)
AIGND< i>
See text for information on bias resistors.
Signal Source Type
Floating Signal Source
(Not Connected to Building Ground)
Grounded Signal Source
Examples
• Ungrounded Thermocouples
• Signal Conditioning with
Isolated Outputs
• Battery Devices
Examples
• Plug-in Instruments with
Nonisolated Outputs
Input
Differential
(DIFF)
Single-Ended —
Ground
Referenced
(RSE)
Single-Ended —
Nonreferenced
(NRSE)