Allen-Bradley 1769-ECL | Left-End Terminator for CompactLogix I/O Systems

Overview

The Allen-Bradley 1769-ECL is a left end cap/terminator used in CompactLogix and MicroLogix 1500 systems to terminate the left end of the 1769 I/O communication bus. This module is required for proper bus integrity and system operation when no communication module is present on the left end of the I/O bank.

It ensures electrical termination and shielding continuity, making it an essential component for maintaining communication reliability and signal integrity across the Compact I/O system.

Key Features

• Terminates Left Side of I/O Bus – Required for systems without a left-end module

• Compact & Lightweight – Simple DIN-rail mountable form factor

• Essential for System Operation – Maintains bus continuity and shielding

• Tool-Free Installation – Clips directly into I/O bank

• Compatible with:

  • CompactLogix Controllers (1769 series)

  • MicroLogix 1500 Systems

Technical Specifications

• Catalog Number: 1769-ECL

• Function: Left end communication bus terminator

• Compatibility: 1769 Compact I/O family

• Mounting Type: DIN rail

• Dimensions: 35 x 118 x 87 mm (W x H x D approx.)

• Weight: Approx. 100 g

• Operating Temperature: 0°C to +60°C

Applications

• CompactLogix I/O Assemblies – Required when no communication module is used on the left

• Machine & Panel Builders – Completes communication setup

• Distributed I/O Systems – Maintains signal integrity at the bus end

Why Choose the 1769-ECL?

• Essential for terminating the communication bus properly

• Simple to install and compatible across Compact I/O systems

• Prevents signal loss and system errors

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