1756-PA50 Allen Bradley | 85-265VAC Input Slim Power Supply

Allen Bradley 1756-PA50 ControlLogix 85-265V AC Slim Power Supply Module

Product Description

The 1756-PA50 (1756-PA50) is a high-efficiency slim-line AC power supply designed specifically for the Allen-Bradley ControlLogix platform. This module is engineered to occupy minimal space on the left side of any 1756 ControlLogix chassis while providing robust, regulated DC power to the backplane. It converts a wide range of global AC input voltages (85–265V AC) into the specific DC levels required by processors, communication adapters, and I/O modules.

The 1756-PA50 (1756-PA50) features advanced diagnostic capabilities, including the ability to sense imminent power failure. This allows the system controller to execute an orderly shutdown and preserve critical data before the backplane voltage drops below operational levels. Its "slim" form factor is ideal for high-density control cabinets where optimizing rail space is a priority.

Detailed Technical Specifications

The 1756-PA50 provides regulated power distribution with the following technical parameters:

• Manufacturer: Allen-Bradley (Rockwell Automation)

• Model/Part Number: 1756-PA50

• Product Line: ControlLogix 1756

• Input Voltage Range: 85–265V AC

• Input Frequency Range: 47–63 Hz

• Maximum Power Consumption: 100 VA

• Real Output Power: 60 Watts @ 0–60 °C

• Output Current (1.2V DC): 1.5 Amperes

• Output Current (3.3V DC): 2.0 Amperes

• Output Current (5.1V DC): 8.0 Amperes @ 50 °C; 6.0 Amperes @ 60 °C

• Output Current (24V DC): 1.5 Amperes

• Inrush Current (Max): 20 Amperes

• Isolation Voltage: 250V Continuous (tested at 1500V AC for 60 seconds)

• Hold-up Time: 5 cycles @ 85V AC (50/60 Hz); 6 cycles @ 120V AC; 25 cycles @ 240V AC

• Mounting Location: Left side of the ControlLogix chassis (dedicated slot)

• Dimensions: 5.51 x 1.38 x 5.71 in (Slim-line width)

Key Performance Features

• Slim-Line Design: Occupies significantly less horizontal space than standard power supplies like the 1756-PA72, allowing for more compact chassis and enclosure layouts.

• Global Voltage Compatibility: The wide input range (85–265V AC) eliminates the need for step-down transformers in most international power grids.

• Intelligent Backplane Signaling: Communicates directly with the system via the backplane to signal power health, enabling proactive fault management.

• Integrated Circuit Protection: Built-in overcurrent and overvoltage protection to safeguard expensive processors and sensitive I/O modules.

• Tool-less Installation: Snaps directly onto the left side of any standard 1756 chassis without the need for additional mounting hardware.