Description

The Allen-Bradley 1756-PSCA is a passive power consolidation adapter designed specifically for the ControlLogix 1756 chassis platform. This module is essential for establishing a redundant power architecture, allowing for the integration of two independent 1756 redundant power supply units. By merging these power feeds into a single, unified pathway, the 1756-PSCA ensures continuous, fault-tolerant operation of the chassis backplane, effectively eliminating single points of failure in critical automation applications.

Features

• Passive electrical design with no active switching components, ensuring high reliability and long MTBF.
• Dual 37-pin Sub-D male connectors for direct interface with 1756-CPR2 redundant power cables.
• Seamless, bumpless hot-swapping capability for power supply units.
• Direct integration with Series B ControlLogix backplanes for multi-rail DC logic distribution.
• Dedicated mounting position on the left-most side of the chassis, preserving standard I/O slot availability.

Applications

This module is widely utilized in high-availability industrial environments where system downtime must be minimized, including oil and gas processing, water and wastewater treatment, power generation, and automated manufacturing lines. It is compatible with 1756-PA75R (AC) and 1756-PB75R (DC) redundant power supplies.

Technical Specifications

Installation Guidelines

• Ensure the ControlLogix chassis is powered down before installing or removing the 1756-PSCA module.
• Mount the module exclusively on the left-most end of the 1756 chassis.
• Verify that the 1756-CPR2 cables are securely fastened to the Sub-D connectors to prevent intermittent power loss.
• Maintain proper ventilation around the chassis to keep ambient temperatures within the 0 to 60 deg C range.
• Handle with standard ESD precautions to protect backplane pins during installation.

FAQ

Does the 1756-PSCA require firmware updates?
No, the 1756-PSCA is a passive electrical device containing no active circuitry, microprocessors, or firmware.

Can I use this with a Series A backplane?
The 1756-PSCA is designed for use with Series B ControlLogix backplanes. Please verify your chassis revision before installation.