Brand:Allen Bradley PLC Item No.:1785-L80E Product Origin:USA Product Dimensions:165 x 51 x 89 mm Product Weight:1.39 kg Payment:T/T, Western Union, Credit Card Goods_stock:15 Shipping Port:Xiamen, China Lead Time:1-3 Days Condition:Brand New And Original Warranty:1 Year Certificate:COO
The Allen-Bradley 1785-L80E PLC-5/80E Processor is a high-capacity industrial controller designed for complex automation environments. As part of the PLC-5 enhanced series, it combines traditional PLC-5 reliability with Ethernet networking capability, enabling improved integration into plant-wide communication systems.
It supports large-scale distributed I/O architectures and multiple communication channels including DH+, Remote I/O, and Ethernet. This makes it suitable for extensive industrial plants requiring coordinated control across many subsystems.
Although discontinued, the 1785-L80E remains widely used in legacy industrial infrastructure due to its reliability, deterministic performance, and long service life in mission-critical applications.
Technical Specifications
Parameter
Specification
Product Model
1785-L80E
Product Type
PLC-5/80E Processor Module
System
Allen-Bradley PLC-5 (1771 chassis)
Communication
Ethernet, DH+, Remote I/O
Memory
Up to 100K words (SRAM, system dependent)
I/O Capacity
Large-scale distributed I/O support
Program Backup
Battery-backed SRAM + EEPROM option
Power Source
1771 chassis backplane
Installation
Leftmost slot in 1771 chassis
Dimensions
165 × 51 × 89 mm
Weight
1.39 kg (3.06 lb)
Industrial Applications
The Allen-Bradley 1785-L80E PLC-5/80E Processor is a high-end Ethernet-enabled PLC-5 controller used in large-scale industrial automation systems. It is part of the PLC-5 enhanced series and is designed for plant-wide control, high I/O capacity, and networked industrial communication.
Typical applications include:
Large manufacturing automation systems
Petrochemical and refinery process control
Power generation plant automation
Water and wastewater treatment systems
Steel and heavy industry production lines
Distributed legacy PLC-5 control networks
Machine sequencing and interlocking systems
Plant-wide supervisory control systems
Product Advantages
High-performance PLC-5/80E processor for complex automation
Integrated Ethernet communication capability
Supports large distributed I/O architectures
Multiple industrial communication interfaces (DH+, Remote I/O, Ethernet)
Battery-backed SRAM for program retention
EEPROM backup support for program recovery
Robust design for long-term industrial operation
Strong compatibility with legacy Rockwell PLC-5 systems
Technical FAQs
1. What is the main function of this module?
It is a PLC-5/80E CPU used to execute control logic and manage industrial I/O systems.
2. What system does it belong to?
It belongs to the Allen-Bradley PLC-5 platform using the 1771 chassis system.
3. Does it support Ethernet?
Yes, it includes built-in Ethernet communication for industrial networking.
4. What communication protocols does it support?
It supports Ethernet, Data Highway Plus (DH+), and Remote I/O communication.
5. Is it still manufactured?
No, it is a discontinued legacy product, but still widely used in existing installations.
6. What industries still use it?
Oil & gas, power generation, heavy manufacturing, and water treatment industries.
7. What is its role in a system?
It acts as the central controller executing ladder logic and managing I/O scanning.
8. Does it support large systems?
Yes, it supports large I/O configurations typical of PLC-5 architectures.
9. What is required for operation?
A compatible 1771 chassis, power supply, and PLC-5 I/O modules.
10. Why is Ethernet important in this model?
It enables faster integration with supervisory systems and modern networked communication compared to older PLC-5 variants.
