Allen-Bradley 1756-CNBR

Allen-Bradley 1756-CNBR | ControlNet Communication Bridge Module with Redundant Media Support

Overview

The Allen-Bradley 1756-CNBR is a ControlNet communication bridge module designed for use in ControlLogix systems. It supports redundant coaxial media for increased network reliability and enables high-speed communication between ControlLogix controllers and other devices over ControlNet networks. Installed into a ControlLogix chassis, the 1756-CNBR allows deterministic data transfer, peer-to-peer messaging, and real-time control in distributed automation systems.

Key Features

• Network Type: ControlNet

• Redundancy: Supports redundant coaxial media (A and B channels)

• Backplane Communication: Interfaces with ControlLogix chassis via high-speed backplane

• Real-Time Performance: Deterministic and repeatable network timing

• Status Indicators: LED diagnostics for channel and module status

• Mounting: Standard ControlLogix chassis slot (right-side placement)

• Integration: Fully supported in Studio 5000 and RSLogix 5000 environments

• Application Flexibility: Suitable for peer-to-peer and distributed control architectures

Technical Specifications

• Catalog Number: 1756-CNBR

• Communication Ports: 2 BNC connectors for redundant ControlNet media

• Backplane Current (5.1V): 700 mA

• Backplane Current (24V): 3 mA

• Operating Temperature: 0°C to 60°C (32°F to 140°F)

• Storage Temperature: -40°C to +85°C (-40°F to +185°F)

• Network Data Rate: 5 Mbps

• Certifications: UL, CE, CSA, RoHS

Applications

• High-speed distributed I/O systems

• Motion and drive control networks

• Process automation requiring deterministic control

• ControlNet-to-ControlLogix network bridging

• Redundant network applications in manufacturing plants

Why Choose the 1756-CNBR?

• Redundant Media: Ensures uptime and reliability in critical systems

• Seamless Integration: Works natively with ControlLogix controllers

• Deterministic Communication: Reliable timing for real-time control

• Easy Diagnostics: Built-in LEDs simplify troubleshooting

• Rockwell Certified: Backed by Allen-Bradley quality and global support

Order Now

The 1756-CNBR is available for immediate shipment worldwide.