1768-PA3 Allen-Bradley CompactLogix Power Supply

Product Overview

The 1768-PA3 is a CompactLogix power supply module from Allen-Bradley. It delivers backplane power to connected modules. Input voltage can be 85-265VAC or 108-132VDC. The unit has a built-in overcurrent protection of 15A. Efficiency is 75% typical. Maximum input power reaches 120 VA or 120 W.

Application Scenarios

This power supply works exclusively with 1768 CompactLogix controllers. Compatible models include 1768-L43, 1768-L43S, 1768-L45, and 1768-L45S. When used with 1769 Compact I/O modules, it supports up to eight modules in one bank. The system relies on proper distance ratings for reliable backplane power.

Technical Specifications

Input frequency range is 47 to 63 Hz for AC. Inrush current is 25 A at low AC and 50 A at high AC. Backplane current is 1.4 Amps at 24 Volts. Power dissipation is 30 Watts maximum. The module has an open-style enclosure. It mounts on DIN rail or panel. LED indicator shows status.

Installation & Maintenance Guide

Before installation, place a 1768 controller in the same bank. Never attach a 1769 power supply to a 1768 backplane. Use copper wire from 14 to 22 AWG. Ensure wire insulation is rated for 167°F. The internal fuse is soldered and non-replaceable. Provide external overcurrent protection of 4 to 6 A.

Packing List

1 x 1768-PA3 Power Supply Module
1 x Installation Manual
Shipping is via Fedex, UPS, or DHL.