Allen-Bradley 1785-BCM PLC-5 Backup Communication Module

Allen-Bradley 1785-BCM PLC-5 Backup Communication Module – Reliable Redundancy Solution

The Allen-Bradley 1785-BCM is a high-performance backup communication module engineered to provide seamless redundancy for PLC-5 control systems. Designed for mission-critical industrial automation environments, this module ensures continuous operation and minimizes downtime through intelligent failover capabilities.

Technical Specifications

• Model Number: 1785-BCM
• Manufacturer: Allen-Bradley (Rockwell Automation)
• Compatible Processors: PLC-5/15 Series B, PLC-5/20, PLC-5/25, PLC-5/30, PLC-5/40, PLC-5/60
• Module Location: 1771 I/O Chassis (local installation)
• Communication Speed: HSSL 1.2 Megabaud
• Backplane Current: BCM: 1.0A @ 5V DC | BEM: 0.6A @ 5V DC
• Keying Locations: Between 8-10, Between 34-36
• Wiring Arm: 1771-WG compatible
• Customer Relay: 0.25A @ 24V DC (resistive load)
• Operating Temperature: 0 to 60 °C (32 to 140 °F)
• Storage Temperature: -40 to 85 °C (-40 to 185 °F)
• Relative Humidity: 5 to 95% (non-condensing)
• Certifications: UL Listed (E65584), CSA Class 1 Division 2 (LR69960C)

Key Applications & Use Cases

The 1785-BCM module excels in environments requiring high availability and fault tolerance:

• Process Manufacturing: Chemical plants, refineries, and pharmaceutical facilities where continuous operation is mandatory
• Power Generation: Utility control systems requiring redundant communication paths
• Water Treatment: Municipal and industrial water systems with 24/7 operational requirements
• Material Handling: Automated warehouses and distribution centers minimizing production interruptions
• Automotive Manufacturing: Assembly lines where downtime translates to significant revenue loss

Intelligent Redundancy Solution

This backup communication module provides automatic switchover capabilities, monitoring primary communication channels and seamlessly transitioning to backup pathways when faults are detected. The HSSL (High-Speed Serial Link) technology delivers 1.2 Megabaud throughput, ensuring rapid data exchange between processors and I/O modules without performance degradation.

Installation & Integration

Designed for straightforward integration into existing 1771 I/O chassis configurations, the 1785-BCM features keyed connectors preventing incorrect installation. The module works in conjunction with the 1771-WG wiring arm for secure, organized cable management. Its compact form factor allows installation in space-constrained control cabinets without requiring system redesign.

Common Questions & Answers

Q: Is the 1785-BCM compatible with all PLC-5 processor models?
A: The module supports PLC-5/15 Series B, 20, 25, 30, 40, and 60 processors. Verify your specific processor model before ordering.

Q: Can I hot-swap this module during operation?
A: While the module supports redundancy, hot-swapping should only be performed following proper safety protocols and manufacturer guidelines to prevent system disruption.

Q: What is the typical failover time?
A: Failover occurs within milliseconds, ensuring minimal impact on control processes. Exact timing depends on system configuration and network topology.

Q: Does this module require special programming?
A: Configuration is performed through RSLogix 5 or RSLogix 5000 software. Basic setup requires configuring communication parameters and redundancy settings.

Q: What maintenance does the 1785-BCM require?
A: Regular inspection of connections, monitoring diagnostic LEDs, and periodic firmware updates (if applicable) ensure optimal performance.

Warranty & Support

Every Allen-Bradley 1785-BCM module from Industrial Control Hub includes a comprehensive 12-month warranty covering manufacturing defects and component failures. Our technical support team provides assistance with installation, configuration, and troubleshooting throughout the warranty period and beyond.

Why Choose Industrial Control Hub?

• Genuine Allen-Bradley components with full traceability
• Fast global shipping with secure packaging
• Expert technical support from automation specialists
• Competitive pricing on industrial automation components
• Extensive inventory of PLC-5 system components

Related PLC-5 System Components

Upgrade your PLC-5 system reliability with the Allen-Bradley 1785-BCM backup communication module. Order today for fast worldwide delivery.

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