Product Overview

The Allen-Bradley 1756-PA75 serves as the primary energy backbone for ControlLogix chassis systems. This 75W AC power supply mounts directly onto the left side of a 1756 chassis, providing regulated DC power to the backplane for I/O modules, processors, and communication adapters. We supply this unit as 100% Brand New and Original in its factory packaging, ensuring maximum MTBF (Mean Time Between Failure) for your critical automation loops.

Technical Specifications

Engineering Advantages

• Global Grid Compatibility: The 1756-PA75 accepts a wide input range (85–265 VAC), allowing engineers to standardize on a single part number across international facilities regardless of local line voltage.

• Ride-Through Protection: The unit provides a 6-cycle hold-up time at 120V AC. This prevents nuisance CPU resets and data loss during brief voltage dips or brownouts common in heavy industrial environments.

• Thermal Efficiency: The design utilizes high-grade reinforced insulation and efficient heat dissipation, allowing it to maintain a full 75W output even at the top of its 60°C temperature rating.

• Chassis Versatility: This module integrates seamlessly with Series B and Series C ControlLogix chassis, offering a simple slide-in installation that requires no external wiring to the backplane.

FAQs

Is this unit compatible with older ControlLogix Series A chassis?

The 1756-PA75 is specifically designed for Series B and C chassis. While it physically fits, we recommend verifying your specific backplane revision to ensure full support for the 10A current draw on the 5.1V rail.

How does the 1756-PA75 handle high-vibration environments?

Allen-Bradley builds these units for industrial-grade durability. The module locks securely into the chassis frame, and the internal components feature potting or reinforced mounting to resist the mechanical stresses found in manufacturing plants and machine automation.

Does this power supply support redundancy?

While the 1756-PA75 is a standard high-capacity supply, it is often confused with the 1756-PA75R (Redundant version). The standard PA75 powers a single chassis reliably; for true N+1 redundancy, you must utilize the 1756-PA75R along with a redundancy cable and a 1756-PSCA2 chassis adapter.

Does the 1756-PA75 come with the power connector?

Yes, every brand new 1756-PA75 includes the necessary terminal block for AC input wiring, ensuring you can begin installation immediately upon arrival.