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Appendix B Connecting I/O Signals

NI 7831R User Manual B-4 ni.com

Connecting to CompactRIO Extension I/O Chassis

You can use the CompactRIO R Series Expansion chassis and CompactRIO

I/O modules with the NI 7831R. Refer to the CompactRIO R Series

Expansion System Installation Instructions for information about

connecting the chassis to the NI 7831R.

Table B-2. NI 7831R I/O Signal Summary

Signal Name

Signal

Type and

Direction

Impedance

Input/

Output

Protection

(Volts)

On/Off

Source

(mA at V)

Sink

(mA at V)

Rise Time Bias

+5V DO — — — — — —

AI<0..7>+ AI 10 GΩ in

parallel with

100 pF

42/35 — — — ±2nA

AI<0..7>– AI 10 GΩ in

parallel with

100 pF

42/35 — — — ±2nA

AIGND AO — — — — — —

AISENSE AI 10 GΩ in

parallel with

100 pF

42/35 — — — ±2nA

AO<0..7> AO 1.25 Ω Short-

circuit to

ground

2.5 at 10 2.5 at –10 10 V/µs —

AOGND AO — — — — — —

DGND DO — — — — — —

DIO<0..15>

Connector 0

DIO<0..39>

Connector <1..2>

DIO — –0.5

to +7.0

5.0 at 2.4 5.0 at 0.4 12 ns —

AI = Analog Input AO = Analog Output DIO = Digital Input/Output DO = Digital Output

1 2 ... 52 53 54 55 56 57 58 59 60 61 62 ... 70 71

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