Rockwell Automation 1769-PB4 Compact I/O Expansion Power Supplies - Manuel (Page 21)

Compact I/O Expansion Power Supplies 21
Publication 1769-IN028B-EN-P - October 2008
Connect Field Wires
The following instructions explain how to wire your power supply.
Ground the Power Supply
Wire the Power Supply
1. 1769-PA4 only - Set the V AC line input power switch behind the clear door to match
your 120V or 240V AC power source as directed by the DANGER label on the
power supply.
The switch is shipped from the factory in the 240V AC position. Remove the selector
switch label that covers the connectors after setting the proper power switch.
2. Connect the ground screw of the power supply to the nearest ground or ground bus.
Use a 2.5 mm 2 (14 AWG) wire and keep the leads as short as possible.
ATTENTION
This product is intended to be mounted to a well-grounded mounting surface such as a
metal panel. Additional grounding connections from the power supply's mounting tabs or
DIN rail (if used) are not required unless the mounting surface cannot be grounded. Refer
to Industrial Automation Wiring and Grounding Guidelines, Allen-Bradley publication
1770-4.1 , for additional information.
TIP
This symbol denotes a protective earth ground terminal that provides a low
impedance path between electrical circuits and earth for safety purposes and provides
noise immunity improvement. This connection must be made for safety purposes.