Allen-Bradley 1756-CNB ControlNet Communication Bridge Module

Product Description

The Allen-Bradley 1756-CNB is a high-performance ControlNet communication bridge module designed for Rockwell Automation's ControlLogix PLC platform, enabling seamless connectivity between ControlLogix controllers and the ControlNet industrial network. Engineered for rugged industrial environments, this module features robust galvanic isolation, advanced electromagnetic interference (EMI) shielding, and a durable industrial-grade enclosure that withstands extreme temperatures, vibration, and electrical noise typical of factory floor and process automation settings. Its compact rack-mount design integrates seamlessly with the ControlLogix chassis, while plug-and-play functionality simplifies installation, configuration, and commissioning. Supporting deterministic, real-time data communication, the 1756-CNB acts as a critical interface for connecting ControlLogix systems to HMIs, remote I/O racks, other PLCs, and upper-level SCADA systems over the ControlNet network, making it an essential component for large-scale, high-reliability industrial automation systems.

Key Functions

The core function of the 1756-CNB module is to provide bidirectional, deterministic communication between ControlLogix PLC controllers and the ControlNet industrial network, supporting both I/O data exchange and peer-to-peer messaging. It enables the ControlLogix system to communicate with up to 99 other ControlNet nodes, including remote I/O racks, other PLCs (ControlLogix, SLC 500, PLC-5), HMIs, and operator workstations with low latency and high data integrity. The module supports ControlNet's producer/consumer communication model, allowing efficient data sharing across multiple devices without dedicated point-to-point connections. It features built-in diagnostic capabilities for real-time monitoring of network status, link health, and communication errors, with alarm generation for proactive maintenance. Additionally, it supports redundant ControlNet network configurations to ensure uninterrupted communication in mission-critical applications, offers configurable network parameters (baud rate, node address), and complies with open ControlNet standards for interoperability with third-party ControlNet devices.

Application Scenarios

The Allen-Bradley 1756-CNB ControlNet communication module is widely deployed in large-scale industrial automation systems across multiple sectors. In automotive manufacturing plants, it connects distributed ControlLogix PLCs controlling assembly lines, robotic cells, and paint shops to a centralized ControlNet network for coordinated production control and data collection. In oil and gas refineries and petrochemical plants, it integrates ControlLogix systems controlling reactor processes, storage tank farms, and pipeline systems into a redundant ControlNet network for reliable process monitoring and control. For power generation facilities (thermal, hydro, nuclear), it links ControlLogix controllers managing turbine systems, boiler controls, and auxiliary equipment to the plant-wide ControlNet network, enabling unified monitoring and emergency shutdown coordination. The module is also ideal for water and wastewater treatment plants, connecting remote pump station ControlLogix systems to the central control network for real-time process monitoring and control. Additionally, it is used in food & beverage processing plants for connecting multiple production line ControlLogix PLCs to a shared ControlNet network, in material handling operations for integrating automated conveyor systems and AS/RS (Automated Storage and Retrieval Systems), and in pharmaceutical manufacturing for linking batch process ControlLogix systems to compliance and quality control systems over ControlNet.

Technical Specifications

Contact Information

• Sales Manager: KI MI
• WeChat: 18059884790
• WHATSAPP: +86 18059884790 (Click to add)
• Email: plc66@qq.com

Core Advantages

• 121 shared inventories worldwide, with direct procurement from overseas warehouses.
• Provide favorable prices and professional after-sales warranty services.
• All products are brand new and original; spare parts come with a one-year warranty and have been tested and certified.
• For orders of more than one product, contact us to get an exclusive discount.
• If other suppliers offer lower prices for the same products, we are willing to provide further discounts based on your budget.

Customer Distribution

Our customers are from: United States, Germany, Japan, South Korea, United Kingdom, France, Italy, Canada, Brazil, India, Australia, Russia, Spain, Netherlands, Switzerland, Sweden, Belgium, Austria, and Turkey.

Note

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