SNAP POWER SUPPLIES
SNAP PAC R-Series Controller User’s Guide
68
Wiring the Primary Power Supply
Use one power supply per I/O unit. Use 14 AWG wire.
1.
Mount the SNAP-PS5 or SNAP-PS5-24DC power supply so that the attached red and black power wires
will reach the + and – power terminals on the SNAP mounting rack.
2.
Using the power terminals on the SNAP mounting rack, attach the red wire to the + terminal and the
black wire to the – terminal. Connect the ground terminal on the SNAP rack to ground.
3.
For the SNAP-PS5 (not illustrated): Using the removable input power connector on top of the power
supply, apply 120 volts AC power between the two terminals marked “AC.” Connect the ground terminal
to ground.
4.
For the SNAP-PS5U (not illustrated): Using the removable input power connector on top of the power
supply, apply 240 or 120 volts AC power between the two terminals marked “AC.” Connect the ground
terminal to ground.
5.
For the SNAP-PS5-24DC (illustrated below): Using the removable input power connector on top of the
power supply, apply 24 volts DC power between the two terminals marked “±DC.” Connect the ground
terminal to ground.
Loop Power Supply
Some analog modules (SNAP-AIMA, SNAP-AIMA-4, SNAP-AIMA-i, SNAP-AIMA2-i) also require a current loop
supply, which can be provided by the SNAP-PS24 or the SNAP-PS24U. Both offer 24 volts of DC power, the
SNAP-PS24 at .75 A and the SNAP-PS24U at 1.25 A. Follow these steps to wire these power supplies.
1.
Mount the SNAP-PS24 or SNAP-PS24U power supply in a location where the attached output power
wires will reach the field connector for SNAP analog modules.
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.
