1756-CN2RK Allen-Bradley Coated Redundant ControlNet Bridge

Allen-Bradley 1756-CN2RK ControlLogix Redundant ControlNet Bridge Module

Product Description

The Allen-Bradley 1756-CN2RK is a high-performance ControlNet™ communication bridge designed for mission-critical ControlLogix® redundancy systems. This module provides a deterministic, high-speed link for concurrent dissemination of time-critical control data and non-time-critical information. The "RK" suffix specifies that this module is factory-tested and optimized for redundant controller and media configurations, ensuring seamless switchover performance in high-availability architectures.

Featuring dual BNC connectors, the 1756-CN2RK supports media redundancy across Channels A and B. It acts as the backbone for distributed I/O and peer-to-peer interlocking between controllers, making it indispensable for large-scale industrial networks that require a 5 Mbps transfer rate and a maximum capacity of 99 nodes. Its robust backplane communication eliminates the need for complex external gateway hardware.

Technical Specifications

Detailed hardware parameters and network performance ratings for the 1756-CMS1C1: