Chapter 2
Hardware Overview of the NI 78xxR
©
National Instruments Corporation
2-17
R Series Intelligent DAQ User Manual
Connecting Analog Output Signals
The AO signals are AO <0..
n
> and AOGND.
AO <0..
n
> are the AO channels. AOGND is the ground reference signal for
the AO channels.
Figure 2-10 shows how to make AO connections to the
NI 783
x
R/784
x
R/785
x
R.
Figure 2-10.
Analog Output Connections
Digital I/O
You can configure the NI 78
xx
R DIO lines individually for either input or
output. When the system powers on, the DIO lines are at high impedance.
To set another power-on state, you can configure the NI 78
xx
R 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 78
xx
R RDIO connectors are DGND and
DIO<0..39>. The DIO signals on the NI 783
x
R/784
x
R/785
x
R RMIO
connector are DGND and DIO<0..15>. The DIO<0..
n
> signals make up the
DIO port and DGND is the ground reference signal for the DIO port. The
NI 781
x
R has four RDIO connectors for a total of 160 DIO lines. The
Load
VOUT 0
+
–
AOGND0
NI 783
x
R/784
x
R/785
x
R
AO0
Channel 0
