Allen Bradley 1785-L20E/E PLC-5/20 Processor

Overview
The Allen-Bradley 1785-L20E/E is a PLC-5/20 processor module designed for industrial automation systems requiring reliable and deterministic control performance. It delivers enhanced processing capability for logic execution, sequencing, and system coordination within PLC-5 architectures. This module is commonly used in manufacturing and process environments where stable operation and dependable system control are essential.

General Information
Part Number: 1785-L20E/E

Manufacturer: Allen-Bradley (Rockwell Automation)

Brand: Allen-Bradley

Country of Origin: USA

Series: PLC-5 Processor Series

Type: PLC Processor Module

Installation: PLC rack-mounted module

Function: Central processing unit for PLC-5 control systems

Application: Industrial automation, machine control, process control systems

Power Specifications
Supply Source: Powered via PLC backplane

Operating Voltage: 5 V DC (system backplane supply)

Power Consumption: Moderate power consumption (< 12 W typical)

Protection: Electrical isolation and system protection

Status Indicators: LED indicators for processor status, run mode, and fault conditions

Communication & Interface
Network Support: PLC-5 communication system compatible

Interface Type: Rack-mounted processor interface

Functionality: Logic execution, I/O control, system coordination

Diagnostics: Processor health monitoring, fault detection, and system status reporting

Configuration: Programmed via PLC programming software tools

Environmental
Operating Temperature: 0 to +60 °C

Storage Temperature: −40 to +85 °C

Relative Humidity: 5% to 95% non-condensing

Vibration Resistance: Industrial-grade vibration tolerance

Protection Level: Designed for enclosed PLC rack environments

Dimensions & Weight
Dimensions: 165 × 51 × 89 mm

Weight: 1.45 kg

Engineered for Control – Performance You Can Rely On