Allen-Bradley 1756-CNBR/E ControlNet Redundant Bridge Module — Original Spare Parts

1756-CNBR/E ControlNet Redundant Bridge Module — Allen-Bradley Original Spare Parts

As a Procurement Manager sourcing critical components for high-availability control systems, you need parts that are verified, traceable, and ready to deploy. The Allen-Bradley 1756-CNBR/E is a factory-sealed, 100% Brand New and Factory Sealed ControlNet Redundant Bridge Module designed for the ControlLogix PLC System platform. It delivers dual-channel media redundancy over ControlNet networks, ensuring uninterrupted data exchange between ControlLogix chassis and distributed I/O racks — even when one network path is compromised. This Original New Control Module is a genuine Rockwell Automation Spare Parts component, fully compatible with the 1756 ControlLogix backplane.

Industrial Automation environments demand zero-tolerance for downtime. The 1756-CNBR/E addresses this by providing automatic millisecond-level failover between primary and secondary ControlNet channels, eliminating single points of failure in your PLC System architecture. Whether you are maintaining an aging DCS infrastructure or expanding a greenfield automation project, this Control Module integrates seamlessly into existing ControlLogix configurations. Its Series E revision includes conformal coating for enhanced durability in harsh industrial environments — making it the preferred choice for engineers in Oil & Gas, Power Generation, and Pharmaceutical manufacturing.

We stock this Original New component with full manufacturer traceability. Contact us today for a competitive quote and fast global delivery.

Typical Application Scenarios

The 1756-CNBR/E serves mission-critical roles across multiple heavy industries:

• ✅ Oil & Gas: Upstream and downstream process control systems require redundant communication paths to prevent costly production shutdowns. This module ensures continuous ControlNet connectivity between the PLC System and remote I/O in hazardous-area installations.
• Power Plants: Turbine control and grid management systems rely on deterministic, fault-tolerant networks. The 1756-CNBR/E provides the redundant media architecture required for IEC 61511 SIS-adjacent applications.
• ✅ Pharmaceutical Manufacturing: Batch processing lines governed by FDA 21 CFR Part 11 require validated, uninterrupted control communications. This Control Module supports scheduled ControlNet messaging for precise, repeatable process execution.
• ✅ Automotive Assembly: High-speed production lines cannot tolerate communication interruptions. Automatic failover from this module keeps robotic cells and conveyor systems running without manual intervention.
• ✅ Water & Wastewater Treatment: Remote pump stations and SCADA-integrated control panels benefit from the module’s robust dual-channel architecture, maintaining reliable Industrial Automation across geographically distributed sites.

Core Features & Technical Advantages

• Dual Redundant ControlNet Media: Two independent network channels with automatic switchover — Robust protection against single-point network failures in any PLC System topology.
• Precision Failover Performance: Sub-millisecond channel switching preserves real-time I/O update integrity without controller intervention or program interruption.
• Heavy-duty Series E Conformal Coating: Protects internal circuitry against moisture, dust, and corrosive atmospheres — extending service life in demanding industrial environments.
• ControlLogix Backplane Compatibility: Installs in any 1756 chassis slot; compatible with ControlLogix 5560, 5570, and 5580 controller families.
• Studio 5000 / RSLogix 5000 Integration: Full configuration and diagnostics support through Rockwell’s standard engineering software suite.
• EOL Legacy System Support: Ideal for maintaining and extending the life of existing ControlNet-based DCS and SIS architectures where replacement infrastructure is not yet feasible.

Technical Specifications & Selection Guide

| Specification | Value | |—|—| | Catalog Number (SKU) | **1756-CNBR/E** | | Network Protocol | ControlNet (Redundant Media) | | Backplane Current Draw | 800 mA @ 5V DC; 5 mA @ 24V DC | | ControlNet Data Rate | 5 Mbps | | Redundancy Type | Dual-channel media with automatic failover | | Operating Temperature | 0°C to 60°C (32°F to 140°F) | | Conformal Coating | Yes (Series E) | | Chassis Compatibility | All 1756 ControlLogix chassis | | Controller Compatibility | ControlLogix 5560 / 5570 / 5580 | | Software Support | Studio 5000 / RSLogix 5000 | | Product Condition | 100% Original and Brand New | | Warranty | 1 Year |

Selection Tip: Choose the 1756-CNBR/E when your application requires ControlNet media redundancy. For non-redundant ControlNet bridging, consider the standard 1756-CNB/E. For EtherNet/IP connectivity, refer to the 1756-EN2T or 1756-EN3TR series.

Logistics & Professional Service

• ✅ 2-Day Express Shipping Available: Urgent replacement orders dispatched within 24 hours of payment confirmation. Global freight partners cover North America, Europe, Middle East, and Asia-Pacific.
• ✅ 1-Year Warranty: Every 1756-CNBR/E unit is covered by a 12-month warranty against manufacturing defects, with rapid replacement coordination for qualified claims.
• ✅ EOL & Legacy System Support: We specialize in sourcing discontinued and hard-to-find Rockwell Automation components. If your DCS or SIS relies on legacy ControlNet infrastructure, we can help you maintain it without costly system-wide upgrades.
• ✅ Full Documentation Package: Datasheet, installation manual, and certificate of conformity available upon request. Traceability documentation provided for regulated industries.
• ✅ Global Export Compliance: All shipments comply with applicable export control regulations. Commercial invoice and packing list provided for customs clearance.

FAQ — Frequently Asked Questions

Q1: What is the price of the Allen-Bradley 1756-CNBR/E?
A: Pricing for the 1756-CNBR/E varies based on order quantity, delivery urgency, and current market availability. We offer competitive pricing for both single-unit emergency replacements and bulk procurement contracts. Contact our sales team at sale@ninermas.com for a real-time quotation tailored to your project requirements.

Q2: Is this 1756-CNBR/E unit 100% original and brand new?
A: Yes. Every unit we supply is 100% Original and Brand New, sourced directly from authorized distribution channels. We do not sell refurbished, repaired, or counterfeit components. Certificate of authenticity and manufacturer traceability are available upon request.

Q3: What is the lead time for the 1756-CNBR/E?
A: In-stock units ship within 1-2 business days. For out-of-stock scenarios, our global sourcing network typically locates and delivers the 1756-CNBR/E within 3-7 business days. Expedited freight options are available for critical shutdowns.

Q4: Can you provide a Datasheet or technical documentation for the 1756-CNBR/E?
A: Yes. The official Rockwell Automation datasheet (Publication 1756-TD006) and installation instructions are available. Please contact us with your inquiry and we will send the documentation package directly to your engineering team.

Q5: Is the 1756-CNBR/E compatible with older ControlLogix chassis and firmware versions?
A: The 1756-CNBR/E is backward compatible with all 1756 ControlLogix chassis generations. Firmware compatibility depends on your controller revision; our technical team can advise on specific version requirements for your existing PLC System configuration.

Q6: Do you provide a Certificate of Origin for customs and compliance purposes?
A: Yes. Country of origin documentation and commercial invoices are provided with every shipment. For regulated industries requiring additional compliance documentation, please specify your requirements at the time of order.

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