National Instruments Multifunction RIO NI R Series, User Manual

Page: 36 / 71

Chapter 2 Hardware Overview of the NI 78xxR
© National Instruments Corporation 2-17 R Series Multifunction RIO 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 gro
u
nd reference signal for
the AO channels.
Fig
u
re 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
Yo
u
can config
u
re the NI 78 xx R DIO lines individ
u
ally for either inp
u
t or
o
u
tp
u
t. When the system powers on, the DIO lines are at high impedance.
To set another power-on state, yo
u
can config
u
re 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
u
p the
DIO port and DGND is the gro
u
nd reference signal for the DIO port. The
NI 781 x R has fo
u
r 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