OPTO 22 SNAP-PAC-R1 User Manual page 91

APPENDIX: SNAP MOUNTING RACKS AND POWER SUPPLIES
The white and red wire is the positive wire (24 VDC). The white and black wire is the negative
wire (24 VDC return).
2. If you are wiring directly to the module, see the wiring diagram for the specific module you are
using.
Examples for an input module are shown in the following diagrams.
SNAP-PS24
In this diagram, the SNAP-PS24 power supply supplies power directly to the input module. The
SNAP-PS5 supplies power to the rack.
SNAP-PS24U
Here, the SNAP-PS24U power supply supplies power directly to the input module. The
SNAP-PS5U supplies power to the rack.
SNAP PAC R-Series Controller User's Guide