Table of Contents
Advertisement
Chapter 4
Analog Input
AI Ground-Reference
*
Setting
Differential
Non-Referenced
Single-Ended (NRSE)
Referenced Single-Ended
(RSE)
*
Refer to the
Analog Input Ground-Reference Settings
software considerations.
†
Refer to the
Connecting Ground-Referenced Signal Sources
M Series User Manual
Table 4-6. Analog Input Configuration
Floating Signal Sources
(Not Connected to Building
Ground)
Examples:
• Ungrounded thermocouples
• Signal conditioning with
isolated outputs
• Battery devices
Signal Source
DAQ Device
AI+
+
AI–
–
Signal Source
DAQ Device
AI
+
–
Signal Source
DAQ Device
AI
+
–
section for descriptions of the RSE, NRSE, and DIFF modes and
section for more information.
4-14
Ground-Referenced
Example:
• Plug-in instruments with
non-isolated outputs
Signal Source
+
+
–
–
AI GND
Signal Source
+
+
–
–
AI SENSE
AI GND
+
Signal Source
–
+
–
AI GND
V
A
Ground-loop potential (V
†
Signal Sources
DAQ Device
AI+
+
AI–
–
AI GND
DAQ Device
AI
+
–
AI SENSE
AI GND
NOT RECOMMENDED
DAQ Device
AI
+
–
V
B
AI GND
– V
) are added
A
B
to measured signal.
ni.com
Hide quick links:
Advertisement
Table of Contents
