Appendix B Connecting I/O Signals
© National Instruments Corporation B-5 NI PXI-7831R User Manual
Connecting to 5B and SSR Signal Conditioning

NI provides cables that allow you to connect signals from the

NIPXI-78 31R directly to 5B backplanes for analog signal conditioning

and SSR backplanes for digital signal conditioning.

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

Signal Name
Driver
Type
Signal
Type and
Direction
Impedance
Input/
Output
Protection
(Volts)
On/Off
Source
(mA at V)
Sink
(mA atV)
Rise
Time Bias
+5V —DO — — — — — —
AI<0..7>+ —AI 10 GΩ in
parallel
with
100pF
42/35 — — — ±2nA
AI<0..7>– —AI 10 GΩ in
parallel
with
100pF
42/35 — — — ±2nA
AIGND —AO — — — — — —
AISENSE —AI 10 GΩ in
parallel
with
100pF
42/35 — — — ±2nA
AO<0..7> —AO 1.25 ΩShort-
circuit to
ground
5 at 10 5 at –10 10V/µs —
AOGND —AO — — — — — —
DGND —DO — — — — — —
DIO<0..15>
Connector 0
DIO<0..39>
Connector<1..2>
Default DIO —–0.5
to+7.0
5.4 at 2.4 5.0 at 0.4 12 ns —
Slow DIO —–0.5
to+7.0
1.9 at 0.4 1.9 at 0.4 75 ns —
Fast DIO —–0.5
to+7.0
16 at 2.4 14 at 0.4 6ns —
AI = Analog Input AO = Analog Output DIO = Digital Input/Output DO = Digital Output