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Allen-Bradley 1756-CNB
by Allen-Bradley
Read verified buyer reviews ↓OverviewElevate the communication capabilities of your ControlLogix system with the Allen-Bradley 1756-CNB ControlNet Communication Bridge Module. This module is expertly crafted to deliver a robust and dependable solution for high-speed data transfer across the ControlNet network, meeting the rigorous demands of contemporary industrial automation. Seamless integration into your current ControlLogix infrastructure is guaranteed, providing deterministic and redundant communication essential for maintaining operational uptime and efficiency in intricate industrial settings. Whether you are expanding an existing setup or establishing a new one, this module embodies the performance and reliability synonymous with Allen-Bradley, making it a crucial component for connecting controllers and I/O.Key Features Accelerated Communication: Achieves swift and consistent data movement across your ControlNet network, reducing delay and maximizing system reactivity. ControlNet Media Redundancy: Ensures continuous operation even during network disruptions, offering vital reliability for crucial industrial processes. Expandable Network Support: Capable of managing extensive systems by supporting an impressive 99 nodes per ControlNet network, future-proofing your automation infrastructure. Seamless ControlLogix Integration: Engineered for straightforward installation into any ControlLogix chassis, simplifying configuration and reducing deployment time. Advanced Diagnostic Tools: Equipped with sophisticated diagnostic functions to support proactive network troubleshooting, optimization, and maintenance, ensuring peak operational effectiveness. Rugged Industrial Construction: Built to endure harsh industrial environments, providing consistent performance across an operating temperature range of 0 to 60°C. Precise Data Exchange: Guarantees consistent and predictable data delivery, which is vital for applications requiring exact timing and control. Technical Specifications Model Designation: 1756-CNB Network Standard: ControlNet Chassis Compatibility: ControlLogix Communication Speed: 5 Mbps Maximum Nodes: Supports up to 99 nodes per network Connection Type: BNC for coaxial interfaces Redundancy Feature: Supports ControlNet media redundancy Operational Temperature Range: 0 to 60°C (32 to 140°F) Applications Distributed Control Systems (DCS): Essential for precise and rapid data interchange across extensive or widely dispersed industrial processes. High-Speed Industrial Automation: Perfectly suited for demanding manufacturing processes, complex assembly lines, and high-volume material handling systems that require instantaneous data processing. Critical Redundant Network Configurations: The ideal selection for situations where network dependability and uninterrupted operation are paramount, such as safety systems or continuous process orchestration. Manufacturing Floor Connectivity: Bridges the connection between various ControlLogix controllers and their associated I/O, fostering a unified and responsive production environment. Process Monitoring Systems: Provides the stable, high-bandwidth communication foundation necessary for accurate, real-time process oversight and adjustments. Why Choose This Model? Unmatched Reliability: With ControlNet media redundancy, the 1756-CNB effectively eliminates single points of failure, ensuring your operations remain uninterrupted. Optimized Performance: Experience 5 Mbps communication speeds, leading to swifter data updates and more responsive control within your ControlLogix system. Future-Ready Scalability: Support for up to 99 nodes per network allows for significant system expansion without sacrificing communication integrity or speed. Simplified Integration: Designed for quick and easy installation into existing ControlLogix chassis, minimizing downtime and accelerating system enhancements. Trusted Brand Quality: Leverage the renowned reliability and engineering prowess of Allen-Bradley, a leader in industrial automation solutions. Order NowReady to upgrade your industrial communication? Add the Allen-Bradley 1756-CNB ControlNet Communication Bridge Module to your cart today and enhance your system's performance and reliability.FAQWhat is the primary function of the Allen-Bradley 1756-CNB?The 1756-CNB serves as a communication bridge module for ControlNet networks within a ControlLogix system, facilitating high-speed and reliable data exchange.Does the 1756-CNB support network redundancy?Yes, this module supports ControlNet media redundancy to ensure continuous operation even if a network fault occurs.How many nodes can the 1756-CNB support on a ControlNet network?The 1756-CNB can support up to 99 nodes per ControlNet network, allowing for significant system expansion.What type of connector does the 1756-CNB use for its connections?The module utilizes BNC connectors for coaxial cable connections.What is the operating temperature range for the 1756-CNB?It operates reliably within a temperature range of 0 to 60°C (32 to 140°F).
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Allen-Bradley 1756-CNB
Overview
This is a genuine Allen-Bradley component from the ControlLogix family. PalmPartsSolution stocks it in new, refurbished, and surplus condition with tested warranty and same-day shipping on in-stock units.
Whether you are sourcing a like-for-like replacement for an existing installation, an emergency spare to keep a line running, or a qualified part for a new build, our team can confirm availability, revision, and lead time before you order.
Key Features
- Genuine Allen-Bradley catalog part
- Tested before shipment
- Backed by PalmPartsSolution warranty
- Cross-reference and revision assistance available
- Compatible with the broader Allen-Bradley automation ecosystem
- Engineered to integrate inside ControlLogix installations
Compatibility
When ordering, match the full catalog/part number, hardware revision, and firmware revision called out by your Allen-Bradley equipment. Where applicable, confirm:
- Input/output voltage and current rating
- Communication protocol and network role
- Mounting form factor and footprint
- Operating temperature, humidity, and IP rating
- Required certifications (UL, CE, ATEX, marine, etc.)
Not sure which revision you need? Send us the catalog number on the nameplate and we will confirm the correct match.
Replacement Information
Three ways to source this part through PalmPartsSolution:
- Exact replacement — same Allen-Bradley catalog number, new or refurbished, tested and warrantied
- Form-fit-function equivalent — alternate revision or build that drops in without code changes
- Engineered migration — current-generation Allen-Bradley platform with documented conversion notes for the ControlLogix family
Contact our engineering team if you need help choosing between these tracks.
Technical Specifications
- Model Designation: 1756-CNB
- Network Standard: ControlNet
- Chassis Compatibility: ControlLogix
- Communication Speed: 5 Mbps
- Maximum Nodes: Supports up to 99 nodes per network
- Connection Type: BNC for coaxial interfaces
- Redundancy Feature: Supports ControlNet media redundancy
- Operational Temperature Range: 0 to 60°C (32 to 140°F)
Applications
- Distributed Control Systems (DCS): Essential for precise and rapid data interchange across extensive or widely dispersed industrial processes.
- High-Speed Industrial Automation: Perfectly suited for demanding manufacturing processes, complex assembly lines, and high-volume material handling systems that require instantaneous data processing.
- Critical Redundant Network Configurations: The ideal selection for situations where network dependability and uninterrupted operation are paramount, such as safety systems or continuous process orchestration.
- Manufacturing Floor Connectivity: Bridges the connection between various ControlLogix controllers and their associated I/O, fostering a unified and responsive production environment.
- Process Monitoring Systems: Provides the stable, high-bandwidth communication foundation necessary for accurate, real-time process oversight and adjustments.
Why Choose the 1756-CNB?
- Unmatched Reliability: With ControlNet media redundancy, the 1756-CNB effectively eliminates single points of failure, ensuring your operations remain uninterrupted.
- Optimized Performance: Experience 5 Mbps communication speeds, leading to swifter data updates and more responsive control within your ControlLogix system.
- Future-Ready Scalability: Support for up to 99 nodes per network allows for significant system expansion without sacrificing communication integrity or speed.
- Simplified Integration: Designed for quick and easy installation into existing ControlLogix chassis, minimizing downtime and accelerating system enhancements.
- Trusted Brand Quality: Leverage the renowned reliability and engineering prowess of Allen-Bradley, a leader in industrial automation solutions.
Availability & Shipping
- ▸In stock: 1756-CNB ready for immediate dispatch from our Florida warehouse.
- ▸Free USA shipping: FedEx Priority (2–5 business days) and UPS Ground (3–5 business days). Expedited options available at checkout.
- ▸Worldwide delivery: FedEx International Priority (1–5 days), UPS International Priority (3–5 days), and USPS International (5–10 days) — rates calculated at checkout.
- ▸Bulk pricing: Volume discounts on request — contact our sales team for quantity quotes.
- ▸Buy with confidence: Every 1756-CNB ships with a 1-Year PALM Parts warranty and a 30-day return window.
Frequently Asked Questions — Allen-Bradley
Machine down? We ship parts the same day.
New, surplus, and refurbished Allen-Bradley inventory in stock. Request a quote or speak directly with an automation specialist for emergency sourcing.
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Independent Supplier Notice
PALM Parts Solution operates as an independent industrial automation supplier and is not an authorized distributor or affiliate of any listed manufacturer or brand name. Manufacturer trademarks and product names are used solely for identification purposes. Original manufacturer warranties do not apply. All products sold by PALM Parts are backed by our own 1-year warranty.
Product Condition & Firmware
All products are sold as new unless stated otherwise. Original manufacturer packaging may show signs of handling, storage, or shelf wear. Date codes and series may vary from current factory production. PALM Parts does not guarantee the presence, version, or compatibility of any firmware on PLC or automation products.