Allen-Bradley 1756-PB72 | ControlLogix GuardLogix Power Supply Module

Overview

The Allen-Bradley 1756-PB72 is a high-performance DC power supply designed for ControlLogix and GuardLogix systems. It provides reliable energy management for industrial control applications, ensuring stable operation across diverse automation environments.

Electrical Specifications

This power supply operates at a nominal input voltage of 24V DC, supporting a wide input range from 19 to 32V DC. Its maximum input power is 95 W, and the maximum output power is 75 W at ambient temperatures between 0–60°C.

The current capacity varies across voltage outputs: 1.5 A at 1.2 V, 4 A at 3.3 V, 10 A at 5.1 V, and 2.8 A at 24 V. The module also handles a maximum inrush current of 30 A.

Protection and Isolation

The 1756-PB72 features reinforced insulation rated at 250 V continuous, with isolation tested at 3,500 V DC for 60 seconds. It includes built-in overcurrent protection, ensuring system safety during abnormal conditions.

Compatibility and Installation

This power supply is compatible with Series A, B, and C ControlLogix chassis. It must be installed in the leftmost slot of the chassis for proper operation. The module includes a single LED status indicator located at the upper right section for simplified monitoring.

Wiring and Terminals

The DC terminals are pre-installed and clearly marked as DC+ for positive and DC- for negative, with a recommendation to connect the protective earth to chassis ground or ground bus. This ensures secure installation and prevents electrical faults.

Key Features

• 24V DC input with 19–32V range for versatile applications.

• Maximum output power: 75 W at 0–60°C ambient temperature.

• Reinforced insulation with 250V continuous isolation.

• Built-in overcurrent protection safeguards connected devices.

• Supports Series A, B, and C ControlLogix chassis.

• Compact design with pre-marked DC terminals and LED indicator.