Product Overview:
The Allen-Bradley 1785-L20B is a robust and highly reliable PLC-5/20 Programmable Logic Controller (PLC) processor module, designed to serve as the central control unit for a wide range of industrial automation applications. As a core component of the venerable Allen-Bradley PLC-5 family, this processor is engineered for demanding environments, providing stable and efficient control over complex machinery and processes. The 1785-L20B excels in scenarios requiring high-speed data processing, precise control, and seamless integration within existing PLC-5 systems. Its enduring design and proven performance make it an ideal choice for maintaining and upgrading legacy industrial control systems, ensuring continued operational efficiency and reliability in manufacturing, process control, and various automated environments. This module is critical for operations that depend on consistent, real-time data handling and execution of control logic, supporting everything from discrete manufacturing lines to continuous process operations.

 
Technical Specifications:

 Part Number: 1785-L20B
 Alternate Part Number: 1785L20B
 Series: PLC-5
 Processor Type: PLC-5/20
 Memory Size: 16K words (16,384 words)
 Memory Type: RAM (Battery-backed)
 Communication Ports: 1 x Data Highway Plus (DH+), 1 x RS-232
 Backplane Current Draw: Approximately 1.5 A @ 5V DC
 Operating Temperature: 0°C to 60°C (32°F to 140°F)
 Storage Temperature: -40°C to 85°C (-40°F to 185°F)
 Relative Humidity: 5% to 95% non-condensing
 Mounting: Chassis Mount (1771 I/O Chassis)
 Programming Software: RSLogix 5
 Weight: Approximately 0.8 kg (1.76 lbs)