National Instruments X Series User Manual page 54

Table 4-3. MIO X Series Analog Input Configuration
AI Ground-Reference
*
Setting
Differential
Non-Referenced
Single-Ended (NRSE)
Referenced Single-Ended
(RSE)
*
Refer to the Analog Input Ground-Reference Settings
DIFF modes and software considerations.
†
Refer to the Connecting Ground-Referenced Signal Sources
Floating Signal Sources
(Not Connected to
Building Ground)
Examples:
• Ungrounded thermocouples
• Signal conditioning with
isolated outputs
• Battery devices
Signal Source
AI+
+
– AI–
Signal Source
AI
+
–
Signal Source
AI
+
–
Ground-Referenced
Example:
• Plug-in instruments with
non-isolated outputs
DAQ Device Signal Source
+
+
–
–
AI GND
DAQ Device Signal Source
+
+
–
–
AI SENSE
AI GND
Signal Source
DAQ Device
+
+
–
–
V
A
AI GND
Ground-loop potential (V
section for descriptions of the RSE, NRSE, and
section for more information.
© National Instruments | 4-11
X Series User Manual
†
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.