NI 9472/9474
12
ni.com
Increasing Current Drive
Each channel of the NI 9472 has a contin
u
o
u
s o
u
tp
u
t c
u
rrent of
0.75 A, and each channel of the NI 9474 has a contin
u
o
u
s o
u
tp
u
t
c
u
rrent of 1 A. If yo
u
want to increase the o
u
tp
u
t c
u
rrent to a
device, yo
u
can connect any n
u
mber of channels together in
parallel. For example,
u
sing the NI 9474, if yo
u
want to drive 4 A
of c
u
rrent, connect DO<0...3> in parallel as shown in Fig
u
re 4.
Yo
u
m
u
st t
u
rn all parallel channels on and off sim
u
ltaneo
u
sly so
that the c
u
rrent on any single channel cannot exceed the 1 A rating.
Figure 4.
Increasing the Current to a Device Connected to the NI 9474
NI 9474
DO3
DO1
DO0
DO2
4 A
+
_
COM
1 A
1 A
1 A
1 A
Extern
a
l
Power
S
upply
De
vice
V
sup
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