Allen Bradley 1785-L11B PLC-5/11 Processor

Overview
The Allen-Bradley 1785-L11B is a PLC-5/11 processor designed for industrial automation control systems. It provides reliable logic processing, sequencing, and control functions for manufacturing and process applications. The unit is part of the PLC-5 family and is widely used in legacy industrial environments requiring stable and deterministic control performance.

General Information
Part Number: 1785-L11B

Manufacturer: Allen-Bradley (Rockwell Automation)

Brand: Allen-Bradley

Country of Origin: USA

Series: PLC-5 Processors

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 (< 10 W typical)

Protection: Built-in electrical isolation and system protection

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

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

Interface Type: Rack-mounted processor interface

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

Diagnostics: Fault detection, processor health monitoring, 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 installations

Dimensions & Weight
Dimensions: 165 × 51 × 89 mm

Weight: 1.36 kg

Legacy Control Power – Trusted Performance for Critical Systems