Allen-Bradley 1756-PB72 | ControlLogix Standard DC Power Supply

Overview

The Allen-Bradley 1756-PB72 is a ControlLogix Standard DC Power Supply designed to deliver reliable 24V DC power to industrial automation systems. It supports a wide input voltage range of 18–32V DC and provides multiple output currents for diverse control requirements.

Technical Specifications

• Model Number: 1756-PB72

• Module Type: Standard DC Power Supply

• Brand: Allen-Bradley

• Series: ControlLogix

• Input Voltage: 18–32 VDC, nominal 24V DC

• Power Output: 75 Watts at 60°C

• Current Capacity: 1.5A @ 1.2V, 2A @ 3.3V, 6–8A @ 5.1V depending on temperature, 2–2.8A @ 24V depending on temperature

• Isolation Voltage: 250V continuous, reinforced, backplane tested at 3500V DC for 60s

• Input Power: 95 Watts

• Max Inrush Current: 30 Amperes

• Hold-Up Time: 35–40 ms depending on input voltage

• Operating Temperature: 0–60°C (32–140°F)

• Non-Operating Temperature: -40–85°C (-40–185°F)

• Relative Humidity: 5–95% non-condensing

• Dimensions: 14.0 × 11.2 × 14.5 cm (5.51 × 4.41 × 5.71 in)

• Weight: 0.95 kg (2.10 lb)

• Chassis Compatibility: 1756-A4/A, A7/A, A10/A, A13/A, A17/A, and B/C variants

• Vibration/ Shock: 2G operational vibration, 30G operating shock, 50G non-operating shock

• Surge & Immunity: ±1 kV line-line, ±2 kV line-earth, 10 Vrms conducted RF immunity, ±4 kV EFT/B

Key Features

The 1756-PB72 provides built-in overcurrent protection and ensures system stability through reinforced insulation tested at 3,500V DC. Its multiple output currents support high-demand industrial control modules.

With PowerBoost capability, it can start high inrush loads, and its compact enclosure fits standard 1756 chassis. The power supply also features excellent surge and RF immunity, ensuring reliable operation in electrically noisy environments.

The operating temperature range of 0–60°C and non-operating range of -40–85°C make this module suitable for harsh industrial conditions. Its compact size and robust construction provide easy installation and long-term durability.

Industrial Applications

The Allen-Bradley 1756-PB72 is ideal for ControlLogix systems, industrial automation, process control, and machine control applications, providing stable and efficient power to all connected modules.