Brand:Allen Bradley PLC Item No.:1785-L11B/E Product Origin:USA Product Dimensions:165 x 51 x 89 mm Product Weight:1.36 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-L11B/E PLC-5/11 Processor is a classic industrial control module within the PLC-5 family, designed to manage deterministic machine and process control tasks in chassis-based automation systems. It serves as the central processing unit for 1771 I/O architectures, coordinating input/output operations with precise scan-based execution.
Technical Specifications
Parameter
Details
Product Model
1785-L11B/E
Series
PLC-5/11
Type
Standard PLC Processor Module
Platform
PLC-5 Chassis-Based System
Memory
8K Word User Memory (typical configuration)
Communication Ports
DH+, Remote I/O, Serial (RS-232)
Programming Software
RSLogix 5
Backplane Current Load
Approx. 2.3 A @ 5V DC
I/O Capacity
Up to 512 points total
Chassis Compatibility
1771 Series I/O Chassis
Power Requirement
Supplied via chassis backplane
Operating Temperature
0°C to 60°C
Dimensions
165 × 51 × 89 mm
Weight
1.36 kg
Recommended Related Models
Model
Product Name
1785-L11B
PLC-5/11 Standard Processor Module
1785-L20B
PLC-5/20 Enhanced Processor Module
1785-L40B
PLC-5/40 High-Performance Processor Module
1785-L80B
PLC-5/80 Advanced PLC Processor Module
Popular Related Models
Model
Product Name
1771-P4
PLC-5 System Power Supply Module
1785-ENET
PLC-5 Ethernet Communication Interface Module
1785-BCM
PLC-5 Backup Communication Module
1771-ASB
Remote I/O Adapter Module
Applications
• PLC-5-based machine control systems in discrete manufacturing environments
• Data Highway Plus (DH+) and Remote I/O (RIO) communication in plant-wide automation networks
• Legacy production line control for automotive, packaging, and material handling systems
• Distributed I/O architectures requiring deterministic scan-based control
• Process coordination in continuous manufacturing industries
• Brownfield system maintenance and incremental PLC-5 upgrades
• Industrial control integration with HMI and supervisory systems
Key Advantages
• Reliable PLC-5/11 processor architecture designed for deterministic industrial control
• Built-in support for DH+, Remote I/O, and serial communication interfaces
• Stable scan-based execution ensuring predictable machine control performance
• Modular chassis-based design for flexible system expansion
• Strong compatibility with legacy Rockwell Automation infrastructure
• Battery-backed memory for program retention during power interruptions
• Proven long lifecycle performance in installed industrial systems
Technical FAQs
1. What system family does the 1785-L11B/E belong to?
It is part of the Allen-Bradley PLC-5 processor family.
2. What communication networks does it support?
It supports Data Highway Plus (DH+), Remote I/O, and serial communication.
3. Is this processor still used in modern automation systems?
It is primarily used in legacy and installed-base systems.
4. What type of memory does it use?
It uses battery-backed SRAM with EEPROM backup capability.
5. Can it handle distributed I/O systems?
Yes, it supports Remote I/O architectures for distributed control.
6. Does it support Ethernet communication directly?
No, Ethernet requires external communication modules.
7. What programming software is used?
Typically RSLogix 5 for PLC-5 programming.
8. Is it suitable for real-time control applications?
Yes, it is designed for deterministic scan-based control.
9. Can it be used in redundant systems?
Redundancy is supported through additional PLC-5 system modules.
10. What is its main usage today?
Maintenance, spare replacement, and legacy system support.
