Allen-Bradley ControlLogix 1756-PA75 AC Power Supply

Product Overview

The Allen-Bradley 1756-PA75 is a high-capacity AC power supply in the ControlLogix® family from Rockwell Automation. Designed to feed stable DC power to the backplane of a 1756 chassis, it supports controllers, I/O modules, and communication adapters with reliable operation. Its slide-in chassis design simplifies installation while providing robust electrical protection for the connected modules.

Key Features

High-Capacity DC Output

• Provides up to 13 A at 5.1V, 2.8 A at 24V, 4 A at 3.3V, and 1.5 A at 1.2V DC for backplane modules

• Supports large, complex chassis configurations with high-density I/O

• Efficient design minimizes heat while maintaining stable voltages

Universal AC Input

• Operates with 85–265V AC line voltage, covering 120V and 240V nominal systems

• Compatible with 47–63 Hz frequencies for global industrial applications

System Protection and Reliability

• Reinforced insulation separates AC input from backplane to prevent electrical transients

• Minimum holdup time of 20 ms at 120V AC and 240 ms at 240V AC allows for brief power disturbances or controlled shutdown

• Open-style enclosure with industrial-grade construction

Installation and Maintenance Friendly

• Slide-in chassis mount with integrated screws for secure attachment

• Front-panel Green LED indicates normal operating status

• Compatible with Series A and Series B ControlLogix chassis

Technical Specifications

Applications

• Powering controllers, communication modules, and I/O modules in ControlLogix chassis

• High-density backplane setups requiring stable DC power

• Industrial applications where AC line input varies globally

Important Notes

The 1756-PA75 is a non-redundant power supply. For applications requiring high availability, the 1756-PA75R redundant version should be used in conjunction with a redundant module.

FAQ

Q: Can the 1756-PA75 support large chassis with multiple controllers?
A: Yes, its high DC output supports complex configurations with multiple controllers and I/O modules.

Q: Is the module compatible with global AC line voltages?
A: Yes, it operates from 85–265V AC and 47–63 Hz.

Q: How is module status indicated?
A: A front-panel Green LED indicates normal operating conditions.

Q: Can this supply be used in redundant systems?
A: No, this is a standard non-redundant supply. Use the 1756-PA75R for redundancy.

Related Model Comparison

Product Tags

ControlLogix, AC Power Supply, Non-Redundant, 75W, 5.1V Output, 24V Output, Backplane Supply