NI 9472/9474
10
ni.com
Yo
u
m
u
st connect an external power s
u
pply to the NI 9472/9474.
This power s
u
pply provides the c
u
rrent for the devices yo
u
connect
to the mod
u
le. Connect the positive lead of the power s
u
pply to
V
s
u
p
and the negative lead of the power s
u
pply to COM. The V
s
u
p
pins on the NI 9472 with DSUB are internally connected. Yo
u
can
connect only one external voltage s
u
pply to the device. Refer to the
section for information abo
u
t the power s
u
pply
voltage range.
Caution
Do not remove or insert mod
u
les if the external
power s
u
pply connected to the V
s
u
p
and COM pins is
powered on.
The NI 9472/9474 has c
u
rrent so
u
rcing o
u
tp
u
ts, meaning the DO
terminal or pin is driven to V
s
u
p
when the channel is t
u
rned on.
