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National Instruments Corp.
17
NI 9512 Operating Instructions and Specifications
Caution
Do
not
connect digital o
u
tp
u
ts to +5 V inp
u
t
circ
u
itry in either sinking or so
u
rcing config
u
ration.
Caution
Only connect the Drive Enable o
u
tp
u
t to +5 V
inp
u
t circ
u
itry when the o
u
tp
u
t is config
u
red for sinking.
Fig
u
re 11 shows an example of wiring the o
u
tp
u
ts to a sinking
inp
u
t device.
Figure 11.
Drive Enable or Digital Output Circuit Configured for Sourcing
Drive Enable or
Digital Output
COM
NI 9512
NI 9512
V
sup
NPN (Sinking)
Input Device
Configured
For Sourcing
Sinking
Circuit
V–
(Reference)
In
Drive Enable or
Digital Output
V+