Chapter 4
Connecting Lighting and External Devices
©
National Instruments Corporation
4-3
NI 177x Smart Camera User Manual
Open Collector Outputs
You can wire an open collector output to both sourcing and sinking output
devices. Refer to Figures 4-2 and 4-3 for wiring examples by output type.
Refer to Appendix A,
, for current requirements.
Connecting to a NPN Device
Connect the ground of the NI 177x Smart Camera and the NPN input
device to a common ground.
Note
Each open collector output can sink up to 100 mA.
Figure 4-2.
Connecting to an External NPN Input Device
OUT0
GND
GND
Inp
u
t
NPN-comp
a
tible
PLC device
NI 177x
S
m
a
rt C
a
mer
a
I/O connector
+24 V m
a
x
