National Instruments NI ISC-1772C User Manual page 37

Note Each open collector output can sink up to 100 mA.
© National Instruments Corporation
Use this protection method if you connect any of the open collector outputs
directly to an inductive load.
Connect the NI 177x Smart Camera output and the negative side of the load
to the diode anode and connect the positive side of the load to a +24 V
power supply and the diode cathode, as illustrated in Figure 4-4.
Connect the ground of the NI 177x Smart Camera and the inductive load
device to a common ground.
NI 177x Smart Camera
I/O connector
Figure 4-4. Connecting to an External Inductive Load Device
Chapter 4 Connecting Lighting and External Devices
External
diode
OUT0
GND
4-5
+24 V max
Sinking input
GND
PNP-compatible
PLC device
NI 177x Smart Camera User Manual