Allen-Bradley 1756-PA75R ControlLogix AC Redundant Power Supply 75W

Allen-Bradley 1756-PA75R ControlLogix AC Redundant Power Supply 75W

The Allen-Bradley 1756-PA75R is a 75W AC redundant power supply designed for the ControlLogix platform, ensuring continuous and reliable power delivery in critical industrial applications. Its redundant configuration enhances system reliability by providing automatic load sharing and seamless power transition in the event of a power supply failure.

Key Features

• Redundant Operation: Supports dual-supply redundancy for increased system reliability and automatic load sharing, ensuring uninterrupted operation even if one supply fails.
• Wide Input Voltage Range: Accepts an input voltage range of 85–265V AC, accommodating various power sources and ensuring flexibility in installation.
• Stable DC Outputs: Delivers regulated DC outputs suitable for driving I/O modules, controllers, and other chassis-mounted devices.
• Automatic Load Sharing: Ensures balanced power distribution between redundant power supplies, enhancing system stability.
• Status Indicators: Provides visual diagnostics for input/output and redundancy status, facilitating easy monitoring and maintenance.
• Hot-Swappable Design: Allows for easy replacement without shutting down the system, minimizing downtime.

Technical Specifications

• Input Voltage Range: 85–265V AC (nominal 120/240V AC, 47–63 Hz)
• Output Power: 75 W at 0–60°C (32–140°F)
• Backplane DC Output Currents:
  • 1.5 A at 1.2 V
  • 4 A at 3.3 V
  • 13 A at 5.1 V
  • 2.8 A at 24 V DC
• Maximum Inrush Current: 20 A (at power-up)
• Hold-Up Time (after input loss): 2 cycles at 60 Hz (typical)
• Chassis Compatibility: 1756-A4, A7, A10, A13, A17 (Series B/C ControlLogix chassis)
• Operating Temperature: 0 to 60°C (32 to 140°F)
• Weight: Approximately 1.45 kg (3.2 lb)

Applications

The 1756-PA75R is ideal for use in process control, manufacturing, and high-availability automation environments where uninterrupted power is essential. Its redundant architecture ensures no single point of failure, making it suitable for critical uptime applications.

Installation and Compatibility

This power supply is designed for easy integration into ControlLogix systems, fitting standard racks and compatible with chassis models 1756-A4, A7, A10, A13, and A17. It is typically mounted in the leftmost slot of the chassis and supports panel mounting.

Compliance and Certifications

• Isolation Voltage: 250V continuous, reinforced insulation type, power input to backplane, power input to annunciator, annunciator to backplane; type tested at 3250V DC for 60 s.
• Certifications: UL, CE, c-UL, and more.

By incorporating the 1756-PA75R into your ControlLogix system, you ensure a robust and reliable power solution capable of meeting the demands of critical industrial applications.