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- Allen Bradley
- 1785-L20E/E
- PLC-5/20 Processor
- USA
- 165 x 51 x 89 mm
- 1.45 kg
- Xiamen, China
- New & In Stock
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- 1 Year
- 1-3 Working Days
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Global Logistics
We have a 10-year logistics and express cooperation agreement, so our products can be shipped to any place in the world.
Brand new and original
Our products are imported in bulk from the place of origin. Because of the cooperative relationship, our products are all original and 100% new.
24-hour service
We provide 7*24 hours service to our customers. We will be there whenever you need us.
Price advantage
All our products are priced very favorably because we have our own warehouse and supply.
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Product Overview
The Allen Bradley 1785-L20E/E is a PLC-5/20 Processor engineered for high-performance industrial automation. This enhanced version (“/E/E”) provides advanced processing speed, increased memory, and improved network communication capabilities. It serves as the central processing unit for PLC-5 systems, capable of managing complex control, logic, and sequencing operations in demanding industrial environments.
Technical Specifications
| Parameter | Details |
|---|---|
| Manufacturer | Allen Bradley |
| Model | 1785-L20E/E |
| Product Type | PLC Processor |
| Function | Central processing unit for PLC-5 systems |
| Compatibility | PLC-5 I/O modules and racks |
| Dimensions | 165 × 51 × 89 mm |
| Weight | 1.45 kg |
| Operating Environment | Industrial automation and process control systems |
Function and Working Principle
The 1785-L20E/E functions by:
- Executing user-defined PLC programs with high-speed processing
- Reading input signals from PLC-5 I/O modules
- Generating output signals to control machinery and processes
- Managing communication with HMIs, networked PLCs, and peripheral devices
- Providing enhanced memory and extended network functionality
It acts as the brain of a PLC-5 system, delivering deterministic, reliable control for complex industrial automation applications.
Role in Industrial Automation
The processor is crucial for:
- Coordinating logic, sequencing, and data processing in PLC networks
- Controlling high-speed machinery and industrial processes
- Maintaining communication between controllers, operator interfaces, and networked devices
- Supporting high-reliability operations requiring fast scan times and redundancy
- Storing and managing larger or more complex control programs
Industrial Applications
Typical applications include:
- Advanced manufacturing automation systems
- Chemical, oil & gas, and power plant process control
- Material handling and automated packaging lines
- Networked PLC environments requiring high-speed data processing
- Industrial systems with extensive I/O modules or complex logic
Installation and System Integration
Installation steps:
- Insert the 1785-L20E/E processor into a PLC-5 rack
- Connect to compatible I/O modules and power supply
- Configure using RSLogix 5 or compatible software
- Verify input/output functionality, program execution, and network communication
The processor’s rugged, compact design ensures easy integration and reliable performance in industrial environments.
Compatible System Components
- PLC-5 I/O racks and modules
- Allen Bradley communication modules (e.g., 1785-ENET, 1785-BCM)
- Operator interfaces and HMIs
- RSLogix 5 programming software
- Networked PLC-5 and ControlLogix systems
Recommended Alternative Models
| Model | Type | Key Feature | Application |
|---|---|---|---|
| Allen Bradley 1785-L20E/E | PLC Processor | Enhanced PLC-5/20 CPU | High-performance industrial automation |
| Allen Bradley 1785-L20B | PLC Processor | Standard PLC-5/20 CPU | Mid- to high-performance automation |
| Allen Bradley 1785-L40B | PLC Processor | Advanced PLC-5/20 CPU | Large-scale, complex industrial systems |
Key Advantages
- High-speed control for complex PLC-5 systems
- Supports advanced logic, sequencing, and data handling
- Enhanced memory and network communication capabilities
- Rugged and industrial-grade design
- Enables efficient, reliable operation in demanding automation environments
Technical FAQs
What distinguishes the 1785-L20E/E from the standard L20B?
The 1785-L20E/E offers enhanced processing, larger memory, and extended network capabilities compared to the standard L20B.
Which I/O modules is it compatible with?
Compatible with PLC-5 I/O racks and modules.
Can it communicate with other PLCs or industrial devices?
Yes, it supports communication with HMIs, networked PLCs, and other devices via Allen Bradley communication modules.
What are its primary applications?
Used in high-speed, high-reliability industrial automation systems, including manufacturing, process control, and complex material handling environments.
Conclusion
The Allen Bradley 1785-L20E/E PLC-5/20 Processor is a high-performance, reliable, and enhanced CPU for industrial automation. With fast processing, extended memory, and advanced network capabilities, it is ideal for complex PLC-5 control systems requiring maximum efficiency, reliability, and operational flexibility.