Chapter 2 Hardware Overview ofthe NI 783xR
© National Instruments Corporation 2-15 NI 783xR User Manual
Figure 2-9. Analog Output Connections
Digital I/O
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.
Connecting Digital I/O Signals
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 Locations, and Figure B-2,
NI78 3xR I/O Connector Pin Assignments, for the connector locations and
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 5V TTL, 3.3 V LVTTL, 5 V CMOS,
and 3.3 VLVCMOS devices. When configured as outputs, they can send
signals to 5V 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
Load
VOUT 0
+
–AOGND0
NI 783
x
R
AO0 Channel 0