Sku: 1756-CNB/D
Country Of Origin: United States
Vendor: Rockwell Automation
Series: ControlLogix
Type: ControlNet Communication Bridge Module
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Product Description
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The Allen-Bradley 1756-CNB/D is a Series D revision of the 1756-CNB ControlNet communication bridge module designed for the ControlLogix automation platform. The module provides deterministic, high-speed communication between ControlLogix controllers, distributed I/O systems, operator interfaces, drives, and other ControlNet-enabled devices.
As a key networking component within ControlLogix architectures, the 1756-CNB/D enables scheduled and unscheduled messaging while maintaining reliable data exchange across industrial control networks. The module is widely used in manufacturing, power generation, oil & gas, water treatment, mining, and process automation facilities requiring robust and predictable network performance.
Its seamless integration with the ControlLogix backplane and ControlNet infrastructure makes it an essential communication solution for distributed automation systems.

Supports deterministic peer-to-peer and controller-to-I/O communication over ControlNet networks.
Provides reliable transfer of control, status, and diagnostic information.
Supports both real-time control traffic and maintenance communications.
Designed specifically for Rockwell Automation ControlLogix systems.
Built for continuous operation in demanding industrial environments.
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