National Instruments sbRIO-9605 - Page 30

NI sbRIO-960x/962x/963x OEM Instructions & Specifications 30 ni.com
Connecting Analog Input Signals
Table 7 summarizes the recommended input configuration for both types of
signal sources.
Table 7. NI sbRIO Analog Input Configuration
AI Ground-Reference
Setting
Floating Signal Sources
(Not Connected to Building
Ground)
Ground-Referenced
Signal Sources
Examples:
• Ungrounded thermocouples
• Signal conditioning with
isolated outputs
• Battery devices
Example:
• Plug-in instruments with
non-isolated outputs
Differential
Referenced Single-Ended
(RSE)
+
–
+
–
AI+
AI–
AI GND
Signal Source
+
–
+
–
AI+
AI–
AI GND
Signal Source
+
–
+
–
AI
AI GND
Signal Source
Ground-loop potential (V
A
– V
B
) are added
to measured signal.
NOT RECOMMENDED
+
–
+
–
AI
AI GND
V
B
V
A
Signal Source