National Instruments NI 9512 User Manual - page 35
© National Instruments
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3-7
or error condition. Refer to the
NI SoftMotion Module
book of the
LabVIEW Help
for a list of
faults, errors, and other conditions that deactivate the Drive Enable output.
Caution
National Instruments strongly recommends using Drive Enable for
personal safety, as well as to protect the motion system.
Drive Enable Output Circuit
You can use software to enable and disable the Drive Enable output and to configure the active
state of the Drive Enable output to on or off. Refer to the drive documentation to determine the
active state of the enable input on the drive. The Drive Enable output type can be configured in
software for sinking or sourcing. If the drive has a sinking enable input, configure the output type
for the Drive Enable circuit for sourcing. Conversely, if the drive has a sourcing enable input,
configure the output type for the Drive Enable circuit for sinking.
Caution
Do
not
connect the Drive Enable output to a +5 V input circuit when the
Drive Enable output is configured for sourcing.
Figure 3-4 shows an example of wiring the output to a sinking input device. Figure 3-5 shows
an example of wiring the output to a sourcing input device.
Figure 3-4.
Drive Enable Circuit Configured for Sourcing
Drive En
ab
le or
Digit
a
l O
u
tp
u
t
COM
NI 951x
NI 951x V
su
p
NPN (
S
inking)
Inp
u
t Device
Config
u
red
For
S
o
u
rcing
S
inking
Circ
u
it
V–
(Reference)
In
Drive En
ab
le or
Digit
a
l O
u
tp
u
t
V+