Allen Bradley 1771-EZ PLC-5 Backplane Extender Module

Product Overview

The Allen-Bradley 1771-EZ is a backplane extender for the PLC-5 1771 I/O platform. It extends the chassis backplane connection, enabling flexible system layout and servicing of 1771 series modules in expanded configurations.

Technical Specs

• Product type: Backplane extender (PCB extender)
• Platform: PLC-5 / 1771 I/O chassis
• Function: Extends backplane bus connection
• Compatibility: 1771 series I/O chassis

Key Features

• Extends backplane connectivity for flexible chassis arrangements
• Required for calibration and servicing of certain 1771 analog modules
• Compact PCB form factor installs directly in the backplane
• Maintains full backplane signal integrity across the extension

FAQ

• What is the 1771-EZ used for? It extends the 1771 backplane and is used during calibration and maintenance of modules such as the 1771-IFE analog input.
• Is it an I/O module? No, it is a passive backplane extension component, not a programmable I/O module.
• Which chassis does it fit? It is compatible with 1771 series A and B I/O chassis.

Installation Guide

1. Power down the chassis completely.
2. Insert the 1771-EZ into the appropriate backplane connector.
3. Attach the module or cable to be extended.
4. Verify all connectors are fully seated.
5. Apply power and confirm normal module operation.

Selection Tips

• Keep a 1771-EZ on hand for 1771 analog module calibration procedures.
• Verify chassis series (A or B) compatibility before ordering.
• Not required for standard I/O installations; it serves specific extension and service functions.