The 1756-PA75R is a ControlLogix redundant AC power supply module designed to provide high-availability power for ControlLogix chassis in critical industrial applications. It supports an input voltage range of 85 to 265V AC (nominal 120/240V AC) at 47 to 63 Hz, making it suitable for global deployment.

Features

• Wide-range AC input voltage support
• Automatic chassis load sharing when used in redundant pairs
• Seamless failover protection with < 5 ms switchover time
• Visual status indicators for real-time health monitoring
• Solid-state relay annunciator output for remote status signaling
• Hot-swappable design for maintenance without system de-energization

Applications

• Water/Wastewater: Chemical dosing and valve control systems
• Oil/Gas/Petrochemical: Pressure loop management and burner gas-feed systems
• Food/Beverage: PID-controlled temperature regulation for mixing and cooking
• Power Generation: Steam governor actuators and cooling tower fan speed integration

Technical Specifications

Installation Guidelines

• Ensure all system power is disconnected before handling the module.
• The 1756-PA75R is typically installed on the far-left side of the chassis or remotely via a chassis adapter.
• Align the top and bottom guides of the power supply with the chassis grooves and slide the module until the rear connector fully seats into the backplane.
• Tighten the top and bottom retaining screws to secure the unit.
• For redundant configurations, use the 1756-PSCA2 chassis adapter and 1756-CPR2 cables.
• Use 2.5 mm2 (14 AWG) copper wire rated at 90 degC or greater for power connections.

FAQ

What is the input voltage range for the 1756-PA75R?

The module is auto-ranging and supports an input voltage range of 85 to 265V AC (nominal 120V or 240V AC at 47 to 63 Hz).

Can I use this power supply as a standalone unit?

Yes, it can operate as a standalone supply. However, its primary purpose is to function in a redundant pair configuration for high-availability systems.

What components are required to build a redundant power supply assembly?

To assemble a redundant pair, you need two 1756-PA75R power supplies, a 1756-PSCA2 chassis adapter module, and two 1756-CPR2 redundant power supply cables.