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Chapter 2 Hardware Overview of the NI 7831R
NI 7831R User Manual 2-8 ni.com
Figure 2-5. Summary of Analog Input Connections
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AI<
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AISENSE
AIGND<
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AISENSE
AIGND<
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See text for information on bias resistors.
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AIGND
Ground-loop losses, V
g
, are added to
measured signal.
NOT RECOMMENDED
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AI<
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>(–)
AIGND<
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V
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AI<
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>(+)
AI<
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>(–)
AIGND<
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>
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)