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Digital I/O
Connecting Digital I/O Signals
© National Instruments Corporation
Load
VOUT 0
Figure 2-9. Analog Output Connections
You can configure the NI 783xR DIO lines individually for either input or
output. When the system powers on, the DIO lines are high impedance. To
set another power-on state, you can configure the NI 783xR to load a VI
when the system powers on. The VI can then set the DIO lines to any
power-on state.
The DIO signals on the NI 783xR MIO connector are DGND and
DIO<0..15>. The DIO signals on the NI 783xR DIO connector are DGND
and DIO<0..39>. The DIO<0..n> signals make up the DIO port and DGND
is the ground reference signal for the DIO port. The NI 7830R has one MIO
and one DIO connector for a total of 56 DIO lines. The NI 7831R/7833R
has one MIO and two DIO connectors for a total of 96 DIO lines.
Refer to Figure B-1,
NI 783xR Connector
NI 783xR I/O Connector Pin
the I/O connector pin assignments on the NI 783xR.
The DIO lines on the NI 783xR are TTL-compatible. When configured as
inputs, they can receive signals from 5 V TTL, 3.3 V LVTTL, 5 V CMOS,
and 3.3 V LVCMOS devices. When configured as outputs, they can send
signals to 5 V TTL, 3.3 V LVTTL, and 3.3 V LVCMOS devices. Because
the digital outputs provide a nominal output swing of 0 to 3.3 V
Chapter 2
AO0
+
–
AOGND0
NI 783 x R
Locations, and Figure B-2,
Assignments, for the connector locations and
2-15
Hardware Overview of the NI 783xR
Channel 0
NI 783xR User Manual
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