Description

The Allen-Bradley 1756-A4 is a compact, 4-slot chassis designed for the ControlLogix platform. This chassis provides the necessary backplane communication and power distribution for ControlLogix modules, including processors, I/O modules, and communication adapters. It is engineered for industrial environments and supports horizontal mounting configurations.

Features

• Four (4) available slots for ControlLogix modules.
• Robust backplane design supporting high-speed data exchange.
• Designed for horizontal mounting in standard industrial enclosures.
• Compatible with standard ControlLogix power supplies and modules.
• Open-type enclosure rating for use in controlled environments.

Technical Specifications

Installation Guidelines

• Ensure the chassis is mounted on a flat, rigid surface within an appropriate industrial enclosure to protect against environmental contaminants.
• Maintain adequate clearance around the chassis to allow for proper airflow and heat dissipation.
• Verify that the backplane connectors are free of debris before inserting modules.
• Always power down the system before installing or removing any ControlLogix modules to prevent electrical damage or unexpected system behavior.
• Ensure the chassis is properly grounded to the enclosure backplane or a common ground point to minimize EMI interference.

FAQ

What is the primary function of the 1756-A4?

The 1756-A4 serves as the physical mounting and electrical backplane for Allen-Bradley ControlLogix modules, allowing them to communicate with the processor and receive power.

Can this chassis be mounted vertically?

The 1756-A4 is specifically designed for horizontal mounting. Refer to the official Allen-Bradley ControlLogix installation manual for specific thermal and orientation requirements if alternative mounting is considered.

Are there any specific power requirements for this chassis?

The chassis itself does not consume power, but it distributes power from a ControlLogix power supply to the modules. It supports a backplane current of 10A at 5V DC and 2.8A at 24V DC.