Allen Bradley 1756-CNBR is a ControlLogix ControlNet redundant media bridge module with dual BNC ports for A/B redundant coaxial networks at 5 Mbps, supporting up to 64 CIP connections and NAP programming port. It enables produce/consume messaging, remote I/O control and network scheduling via RSNetWorx, fits one chassis slot, and features diagnostic LEDs. This legacy bridge module has been discontinued by Rockwell.
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1756-CNBR
Allen Bradley
The Allen‑Bradley 1756-CNBR ControlNet Redundant Bridge Module — a redundant ControlNet bridge module purpose‑built for Allen‑Bradley 1756 ControlLogix PLC automation control systems — delivers redundant ControlNet network bridging, data routing between ControlNet network segments, remote I/O scanning and cross‑segment controller messaging for high‑availability industrial automation applications. Designed for discrete manufacturing, material handling, water‑wastewater treatment, petrochemical processing, and critical process industries, the Allen‑Bradley 1756-CNBR ControlNet Redundant Bridge Module integrates dual ControlNet communication transceivers, backplane interface circuitry, status indicator circuitry and redundant routing management logic, ensuring reliable redundant network transmission across all operating conditions.
The Allen‑Bradley 1756-CNBR ControlNet Redundant Bridge Module supports redundant ControlNet media operation, connects to 1756 ControlLogix chassis backplane, works with ControlNet I/O adapters and compatible ControlLogix processors, and operates across a wide industrial temperature range of 0 °C to +60 °C. The Allen‑Bradley 1756-CNBR ControlNet Redundant Bridge Module carries industrial EMC compliance certification for heavy‑duty workshop environments, fully complying with UL, CE and relevant international industrial control equipment standards. Whether deployed for network segment isolation, redundant network upgrading or critical production line control, the Allen‑Bradley 1756-CNBR ControlNet Redundant Bridge Module delivers the dependable redundant ControlNet bridging capability that high‑availability ControlLogix systems demand.
Part Number | 1756-CNBR |
Manufacturer | Allen Bradley |
System Compatibility | Allen‑Bradley 1756 |
Country of Origin | USA |
Product Condition | 100% New & Original |
Operating Temperature Range | 0 °C to +60 °C (32 °F to +140 °F) |
Lead Time | 2-3 business days after payment confirmation |
Warranty | 1 year |
Shipping Carriers | DHL, FedEx, UPS, TNT, EMS |
Contact:Cheryl Qi |
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The Allen‑Bradley 1756-CNBR ControlNet Redundant Bridge Module stands out from comparable bridge modules in several key areas. Dual‑channel redundant ControlNet bridge design. The Allen‑Bradley 1756-CNBR ControlNet Redundant Bridge Module supports redundant A/B ControlNet media, automatic channel switching when one network cable or channel fails, and the Allen‑Bradley 1756-CNBR ControlNet Redundant Bridge Module avoids single‑point network failure for critical segmented ControlNet networks. High‑speed deterministic ControlNet bridging performance. The Allen‑Bradley 1756-CNBR ControlNet Redundant Bridge Module runs at fixed 5 Mbps ControlNet speed, supports scheduled I/O data and unscheduled message routing between network segments, the Allen‑Bradley 1756-CNBR ControlNet Redundant Bridge Module ensures deterministic communication for distributed remote I/O. Native ControlLogix backplane integration. As a factory‑original bridge module of Allen‑Bradley 1756 series, the Allen‑Bradley 1756-CNBR ControlNet Redundant Bridge Module directly plugs into 1756 chassis, no extra conversion adapter required. Comprehensive diagnostic LED indication. The Allen‑Bradley 1756-CNBR ControlNet Redundant Bridge Module is equipped with LEDs for module status, network status, channel A and channel B status, technicians can quickly locate fault points of the Allen‑Bradley 1756-CNBR ControlNet Redundant Bridge Module without complex diagnostic tools. Convenient configuration via RSLogix 5000. Users can configure node address, routing tables and redundant parameters for the Allen‑Bradley 1756-CNBR ControlNet Redundant Bridge Module inside RSLogix 5000 software, supporting online edits and network monitoring.
Segmented Critical Process Control Redundant Network. Redundant ControlNet bridge module within Allen‑Bradley 1756 ControlLogix PLC systems, the Allen‑Bradley 1756-CNBR ControlNet Redundant Bridge Module is widely used for petrochemical, power and water treatment process control that requires network segmentation and zero network interruption. Cross‑segment Remote Redundant I/O Scanning. The Allen‑Bradley 1756-CNBR ControlNet Redundant Bridge Module connects isolated ControlNet network segments, allowing the local ControlLogix chassis to scan distributed remote I/O racks across different network segments over redundant media. Inter‑segment Controller Data Messaging. The Allen‑Bradley 1756-CNBR ControlNet Redundant Bridge Module supports message communication between multiple ControlLogix controllers located on separate ControlNet network segments. Legacy ControlNet High‑availability System Maintenance. The Allen‑Bradley 1756-CNBR ControlNet Redundant Bridge Module is stocked as spare replacement part for existing segmented redundant ControlLogix ControlNet networks. Industrial Automation Turnkey Project Network Segmentation. The Allen‑Bradley 1756-CNBR ControlNet Redundant Bridge Module serves as standard redundant routing interface for high‑reliability segmented ControlLogix automation solutions.
The Allen‑Bradley 1756-CNBR ControlNet Redundant Bridge Module holds the following international safety and compliance approvals: • UL listed — North‑American industrial control equipment safety approval. • CE certification — European industrial control equipment safety and EMC compliance. • C‑Tick marked — EMC compliance for Australian and New Zealand markets. • Class I Division 2 certified — Suitable for installation in specified hazardous classified locations.
All modules supplied are 100% new original Allen‑Bradley parts. Every Allen‑Bradley 1756-CNBR ControlNet Redundant Bridge Module unit is functionally tested before dispatch, packed in professional anti‑static packaging, and covered by a one‑year warranty from the date of delivery.
Get the Allen Bradley 1756-CNBR with fast worldwide delivery — in‑stock units ship within 2‑3 business days of payment confirmation.
• Email: chen@htechplc.com
• WhatsApp / Phone: +86-181-5013-7565
• Shipping carriers: DHL, FedEx, UPS, TNT
Why buy from us:
• 100% new and original Allen‑Bradley 1756 series parts including the Allen‑Bradley 1756-CNBR ControlNet Redundant Bridge Module
• Every product tested before shipment
• Professional anti-static packaging
• One‑year warranty on all units
• Free online quotes and 24/7 technical support
• Competitive pricing with fast global delivery