Allen Bradley 1771-ALX Local I/O Adapter Module

Overview

The Allen Bradley 1771-ALX is a local I/O adapter module designed for PLC-5 and 1771 series systems. It enables high-speed communication between the processor and remote or local I/O chassis, ensuring reliable data transfer and system synchronization in industrial automation applications. It is commonly used in distributed control architectures and legacy PLC installations.

General Information

Part Number: 1771-ALX

Manufacturer: Allen-Bradley (Rockwell Automation)

Brand: Allen-Bradley

Country of Origin: USA

Series: 1771 I/O System / PLC-5

Product Type: Local I/O Adapter Module

Mounting Type: Installed within 1771 I/O chassis

Function: Provides communication link between PLC processor and local I/O racks

Design: Industrial communication adapter for modular PLC systems

Power Specifications

Input Power: Supplied via 1771 backplane

Operating Voltage: System-dependent PLC-5 architecture

Power Consumption: Low-power electronic module

Protection: Electrical isolation and industrial surge protection

Start-Up: Automatic synchronization with PLC system during initialization

Communication & Interface

Interface Type: 1771 local I/O backplane communication

System Role: I/O adapter between processor and chassis

Data Transfer: High-speed parallel backplane communication

Diagnostics: Status LEDs for module health and communication status

System Integration: Compatible with PLC-5 processor systems and 1771 racks

Environmental

Operating Temperature: 0 to 60 °C

Storage Temperature: -40 to 85 °C

Humidity: 5% to 95% non-condensing

Vibration Resistance: Industrial-grade cabinet installation standard

Protection Rating: IP20 when installed in enclosure

Installation Environment: Industrial control cabinet required

Dimensions & Weight

Dimensions (H × W × D): 165 × 51 × 89 mm

Weight: 0.6 kg

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