Allen-Bradley 1756-CNBR ControlNet Redundant Bridge Module 1756CNBR

Description:

The Allen-Bradley 1756-CNBR ControlNet Redundant Bridge Module is used in industrial automation systems to provide redundant high-speed ControlNet network bridging between ControlLogix chassis or distributed control nodes, ensuring continued communication in mission-critical applications. Commonly installed in ControlLogix I/O racks and distributed automation architectures where network uptime and fault tolerance are essential to maintain real-time control and prevent loss of communication during link failures. Maintenance teams, system integrators, and automation engineers use this module for redundant network design, system upgrades, replacement of failed bridge modules, and enhancement of network reliability.

Applications:

The Allen-Bradley 1756-CNBR ControlNet redundant bridge module is commonly used in industrial environments including manufacturing production lines, batch process plants, material handling systems, oil & gas facilities, utilities automation, and large-scale distributed control architectures where fault-tolerant ControlNet communication improves overall system availability and reduces unplanned downtime.

Technical Specifications:

• Manufacturer: Allen-Bradley
• Model: 1756-CNBR
• Product Type: ControlNet Redundant Bridge Module
• Network Type: ControlNet fault-tolerant network bridging
• Function: Provides redundant ControlNet path and network communication integrity
• Compatibility: Rockwell Automation ControlLogix I/O and ControlNet network systems
• Communication Interfaces: Dual ControlNet network ports for redundant configuration
• Mounting Type: Rack mounted in ControlLogix chassis
• Redundancy Support: ControlNet redundant link bridging for failover
• Application Category: Industrial network communication and redundancy
• Operating Temperature Range: Industrial rated conditions
• Protection Rating: Installed within control or automation enclosure

Common Replacements:

• Allen-Bradley 1756-CNBR/A ControlNet Redundant Bridge Module 
• Allen-Bradley 1756-CNA ControlNet Adapter Module 
• Rockwell Automation 1781-CNBR ControlNet Redundant Bridge Module