A-B 1756-PA75R Redundant Power Supply Module

Allen-Bradley 1756-PA75R Redundant Power Supply Module (ControlLogix)

 

 

The Allen-Bradley 1756-PA75R is a ControlLogix AC Redundant Power Supply Module designed for high-availability ControlLogix systems. It provides stable backplane power and supports redundant power supply architectures to improve system reliability and uptime.

Key Specifications

• Model: 1756-PA75R
• Brand: Allen-Bradley (Rockwell Automation)
• Series: ControlLogix
• Product Type: Redundant AC Power Supply Module
• Input Voltage:
  • 85–265 VAC
  • Nominal 120/240 VAC
• Input Frequency:
  • 47–63 Hz
• Maximum Output Power:
  • 75 W
• Output Current:
  • 13 A @ 5.1 VDC
  • 2.8 A @ 24 VDC
  • 4 A @ 3.3 VDC
  • 1.5 A @ 1.2 VDC
• Operating Temperature:
  • 0°C to 60°C
• Weight:
  • Approximately 1.45 kg (3.2 lb)

What it does (simple explanation)

AC Power Input
↓
1756-PA75R Power Supply
↓
ControlLogix Backplane
↓
CPU / Communication Modules / I/O Modules

The module converts incoming AC power into regulated DC voltages required by the ControlLogix chassis and supports redundant power configurations for critical applications.

Main Features

• Supports ControlLogix redundant power systems
• 75W output capacity
• Wide-range AC input (85–265 VAC)
• High reliability for critical control applications
• Continuous isolation protection
• Diagnostic/alarm output capability
• Designed for 24/7 industrial operation

Compatibility

Compatible with ControlLogix chassis:

• 1756-A4
• 1756-A7
• 1756-A10
• 1756-A13
• 1756-A17

For redundant installations it is typically used with:

• 1756-PSCA2 Power Supply Chassis Adapter
• 1756-CPR2 Redundancy Cable assemblies

Applications

• Process control systems
• Oil & gas facilities
• Power generation plants
• Water treatment systems
• Pharmaceutical production
• High-availability manufacturing systems
• Redundant PLC architectures