National Instruments DAQ X Series User Manual page 58

Chapter 4 Analog Input
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
software considerations.
†
Refer to the Connecting Ground-Referenced Signal Sources
X Series User Manual
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Floating Signal Sources
(Not Connected to Building
Ground)
Examples:
• Ungrounded thermocouples
• Signal conditioning with
isolated outputs
• Battery devices
Signal Source DAQ Device
AI+
+
+
– AI–
–
AI GND
Signal Source DAQ Device
AI
+
+
–
–
AI SENSE
AI GND
Signal Source DAQ Device
AI
+
+
–
–
AI GND
section for descriptions of the RSE, NRSE, and DIFF modes and
section for more information.
4-12
Ground-Referenced
†
Signal Sources
Example:
• Plug-in instruments with
non-isolated outputs
Signal Source DAQ Device
AI+
+
+
– AI–
–
AI GND
Signal Source DAQ Device
AI
+
+
–
–
AI SENSE
AI GND
NOT RECOMMENDED
Signal Source DAQ Device
AI
+
+
–
–
V
A
V
B
AI GND
Ground-loop potential (V – V ) are added
A B
to measured signal.
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