Allen Bradley 1785-BCM/C Backup Communication Module
Allen Bradley 1785-BCM/C Backup Communication Module
0.0
Points
Brand:Allen Bradley PLC Item No.:1785-BCM/C Product Origin:USA Product Dimensions:165 x 51 x 89 mm Product Weight:0.58 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-BCM/C Backup Communication Module is a PLC-5 system component designed to provide high-speed communication redundancy across industrial automation networks. It ensures continuous data exchange between controllers and I/O systems by automatically switching communication paths when a failure is detected.
Technical Specifications
Parameter
Details
Product Model
1785-BCM/C
Series
PLC-5 Backup Communication Module
Function
Communication Redundancy / Backup Switching
System Compatibility
PLC-5/15, /20, /25, /30, /40, /60
Communication Protocols
Data Highway Plus (DH+), Remote I/O (RIO)
Switchover Type
Automatic high-speed failover
Chassis
1771 I/O Chassis
Power Supply
Backplane powered (no external supply required)
Operating Temperature
0°C to 60°C
Dimensions
165 × 51 × 89 mm
Weight
0.58 kg
Recommended Related Models
Model
Product Name
1785-BCM
PLC-5 Backup Communication Module (Standard Version)
1785-BEM
PLC-5 Backup Expansion Module
1785-KA5
DH+ Communication Interface Module
1785-ENET
PLC-5 Ethernet Communication Module
Popular Related Models
Model
Product Name
1756-CN2R
ControlNet Redundant Bridge Module
1756-EN2T
ControlLogix Ethernet Communication Module
1771-ASB
Remote I/O Adapter Module
1785-L40B
PLC-5 Processor Module
Applications
• PLC-5 redundancy systems requiring high-availability communication paths
• Data Highway Plus (DH+) and Remote I/O (RIO) network backup switching
• Continuous production lines where communication failure cannot interrupt operations
• Distributed industrial control systems requiring synchronized dual-controller architecture
• Critical process industries such as oil & gas, power generation, and chemical plants
• Legacy Rockwell Automation system modernization with maintained redundancy
• High-reliability automation environments with failover communication requirements
Key Advantages
• High-speed automatic switchover between primary and backup communication channels
• Supports redundant DH+ and Remote I/O network architectures
• Improves system uptime by eliminating single-point communication failures
• Designed for seamless integration with PLC-5 processor systems
• Diagnostic indicators for fast fault detection and system troubleshooting
• Industrial-grade reliability for harsh factory and process environments
• Proven redundancy architecture widely used in mission-critical automation systems
Technical FAQs
1. What is the main function of the 1785-BCM/C module?
It provides backup and redundancy for PLC-5 communication networks.
2. Which networks does it support?
It supports Data Highway Plus (DH+) and Remote I/O (RIO) communication links.
3. Does it support automatic failover?
Yes, it automatically switches communication paths during faults or failures.
4. Is it compatible with ControlLogix systems?
No, it is designed specifically for PLC-5 architecture.
5. Does it require external power?
No, it is powered through the PLC chassis backplane.
6. What triggers a switchover event?
Power failure, processor fault, or communication partner failure.
7. Can it operate in redundant PLC setups?
Yes, it is specifically designed for redundant PLC-5 systems.
8. Is configuration required for redundancy?
Yes, proper system configuration is required for correct backup operation.
9. What software is used with this module?
Typically RSLogix 5 and RSLinx for configuration and diagnostics.
10. Is this module still commonly used today?
It is primarily used in legacy systems and installed-base maintenance.
