National Instruments NI 9512 User Manual - page 43
© National Instruments
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3-15
Figure 3-16.
High-Side Switch Connected to a Sourcing Digital Input
Digital Outputs
The NI 9512 drive interface module also has two general-purpose digital outputs with an output
voltage range of 0 to 30 V.
Digital Output Circuit
You can configure the active state of the digital outputs in software for on or off and the digital
output circuit can be configured in software for sinking or sourcing output type. If you are
connecting to sinking inputs, configure the output type to sourcing. Conversely, if you are
connecting to sourcing inputs, configure the output type to sinking.
Caution
Do
not
connect digital outputs to +5 V input circuitry in either sinking or
sourcing configuration.
Tip
Refer to the
Signal Connection Recommendations
section of Chapter 4,
Accessory and Cable Connections
, for additional wiring and cabling
recommendations.
Figure 3-17 shows an example of wiring the digital outputs to a sinking input device.
Figure 3-18 shows an example of wiring the digital outputs to a sourcing input device.
Figure 3-17.
Digital Output Circuit Configured for Sourcing
Low-
S
ide
S
witch
COM
NI 951x
Limit, Home,
or Digit
a
l Inp
u
t
NI 951x V
su
p
Config
u
red
For
S
o
u
rcing
Limit, Home,
or Digit
a
l Inp
u
t
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+