National Instruments NI 784xR, User Manual

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Appendix A Connecting I/O Signals
© National Instruments Corporation A-5 R Series Intelligent DAQ User Manual
Caution Connections that exceed any of the maximum ratings of input or output signals
on the NI 78 xx R can damage the NI 78 xx R and the computer. Maximum input ratings for
each signal are in the Protection column of Table A-2. NI is not liable for any damage
resulting from such signal connections
Table A-2. NI 78 xx R 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 — — — — — —
Analog Signals (NI 783 x R/784 x R/785 x R Only)
AI<0..7>+ AI 10 G
Ω
in
parallel with
100 pF
42/35 — — — ±2 nA
AI<0..7>– AI 10 G
Ω
in
parallel with
100 pF
42/35 — — — ±2 nA
AIGND AO — — — — — —
AISENSE AI 10 G
Ω
in
parallel with
100 pF
42/35 — — — ±2 nA
AO<0..7> AO 1.25
Ω
Short
circuit to
ground
2.5 at 10 2.5 at –10 10 V/
μ
s —
AOGND AO — — — — — —
Digital Signals (All NI 78 xx R Devices) — — — —
DIO<0..39>
Connector<0..3>
(NI 781
x R)
DIO<0..15>
Connector 0
(NI 783
x R,
NI 784 x R, and
NI 785 x R)
DIO<0..39>
Connector <1..2>
(NI 783
x R,
NI 784 x R, and
NI 785 x R)
DIO — –0.5 to +7.0
(NI 783
x R)
–20 to 20
(NI 784
x R/
NI 785 x R)
4.0 at 2.4 4.0 at 0.4 — —
AI = Analog Input AO = Analog Output DIO = Digital Input/Output DO = Digital Output