Allen-Bradley 1756-DNB/E DeviceNet Bridge Module | ControlLogix Communication Interface

Allen-Bradley 1756-DNB/E DeviceNet Bridge Module (Industrial-Grade Network Communication Solution)

The Allen-Bradley 1756-DNB/E is a high-performance DeviceNet Bridge Module designed for seamless integration between ControlLogix systems and DeviceNet networks. Through advanced communication protocols and real-time data exchange capabilities, this module enables reliable connectivity with DeviceNet I/O devices, drives, and sensors, ensuring stable operation in demanding industrial environments.

Ideal for manufacturing automation, process control, material handling systems, and machine integration applications, this module addresses critical challenges including network compatibility issues, I/O expansion limitations, multi-vendor device integration complexity, and real-time communication delays that can impact production efficiency.

Featuring standardized design with flexible configuration options, the 1756-DNB/E delivers proven reliability, simplified installation and commissioning, excellent compatibility with legacy systems, and comprehensive diagnostic capabilities. Perfect for system integrators, automation engineers, OEM equipment manufacturers, and plant maintenance teams seeking robust industrial networking solutions. Contact our engineering team for application-specific configuration guidance and technical support.

Core Features & Advantages

Seamless DeviceNet Integration
Provides native DeviceNet Master/Slave communication capability, supporting up to 63 nodes on a single network segment. Enables direct connection to DeviceNet I/O modules, motor drives, sensors, and actuators with minimal configuration overhead.

High-Speed Data Exchange
Supports DeviceNet communication rates up to 500 Kbps, ensuring real-time data transfer between ControlLogix processors and field devices. Reduces system latency and improves overall control loop performance by up to 40% compared to traditional gateway solutions.

Flexible Network Architecture
Compatible with both linear and tree network topologies, allowing adaptable installation in various plant layouts. Supports hot-swappable connections and online device replacement without disrupting network operations.

Comprehensive Diagnostic Tools
Built-in network diagnostics with LED status indicators for power, module status, network activity, and fault conditions. Provides detailed error logging and troubleshooting information through RSLogix 5000 software, reducing downtime and maintenance costs.

Robust Industrial Design
Engineered for harsh industrial environments with conformal coating protection, wide operating temperature range (-40°C to 70°C), and immunity to electrical noise and vibration. Meets UL, CE, and C-Tick safety certifications for global deployment.

Simplified Configuration Interface
Intuitive setup through RSNetWorx for DeviceNet software with graphical network visualization, drag-and-drop device configuration, and automatic EDS file management. Reduces commissioning time and minimizes configuration errors.

Typical Application Scenarios

This module is specifically designed for industrial environments requiring reliable DeviceNet connectivity and real-time control, particularly in:

Automotive Manufacturing & Assembly Lines
Connects robotic welding stations, conveyor systems, and quality inspection equipment to ControlLogix controllers. Enables coordinated multi-station operations with precise timing control and fault detection across production cells.

Food & Beverage Processing Plants
Integrates packaging machinery, filling systems, and material handling equipment through DeviceNet networks. Supports sanitary design requirements while maintaining high-speed communication for batch control and recipe management applications.

Chemical & Pharmaceutical Manufacturing
Facilitates connection of process instrumentation, valve actuators, and variable frequency drives in regulated environments. Provides audit trail capabilities and validated communication protocols required for GMP compliance.

Material Handling & Warehouse Automation
Links conveyor controls, sortation systems, and automated storage/retrieval equipment to central ControlLogix platforms. Enables real-time tracking and routing decisions across complex distribution networks.

Machine Tool & Metalworking Equipment
Connects CNC machine tools, servo drives, and tool changers through standardized DeviceNet interfaces. Supports high-precision motion control and coordinated multi-axis operations in manufacturing cells.

Technical Parameters & Selection Guide

To facilitate system design and module selection, we provide comprehensive technical specifications for the 1756-DNB/E module. Custom configurations are available based on specific project requirements.

Key Technical Specifications:

• Communication Protocol: DeviceNet (CAN-based, compliant with ODVA specifications)
• Network Speed: 125 Kbps, 250 Kbps, 500 Kbps (selectable)
• Maximum Nodes: 63 devices per network segment
• Backplane Current: 800 mA @ 5V DC, 5 mA @ 24V DC
• Power Consumption: Approximately 4.0 Watts
• Operating Temperature: -40°C to 70°C (-40°F to 158°F)
• Storage Temperature: -40°C to 85°C (-40°F to 185°F)
• Relative Humidity: 5% to 95% non-condensing
• Shock Resistance: 30g operational, IEC 60068-2-27
• Vibration Resistance: 2g @ 10-500 Hz, IEC 60068-2-6
• Enclosure Rating: Open-type module for installation in NEMA/IP-rated enclosures
• Certifications: UL Listed, CE marked, C-Tick, RCM
• Module Dimensions: Standard 1756 single-slot width (35mm)
• Mounting: ControlLogix 1756 chassis (any available slot)

Selection Considerations:
When selecting the 1756-DNB/E module, consider the following factors: total number of DeviceNet nodes required, maximum network cable length (up to 500m at 125 Kbps), data throughput requirements, environmental conditions (temperature, humidity, vibration), and compatibility with existing ControlLogix chassis and power supplies. For assistance with system architecture design, please provide your application details including I/O count, network topology, and control requirements. Our application engineers will recommend optimal configuration and provide integration support.

Advanced Configuration Options

Multi-Network Capability
Multiple 1756-DNB/E modules can be installed in a single ControlLogix chassis to support separate DeviceNet networks, enabling network segmentation for improved performance and fault isolation.

Redundancy Support
Compatible with ControlLogix redundancy systems (1756-RM/RM2) for mission-critical applications requiring continuous operation and automatic failover protection.

Remote I/O Integration
Seamlessly integrates with Allen-Bradley DeviceNet I/O families including 1734 POINT I/O, 1738 ArmorPOINT, and third-party DeviceNet-compliant devices.

Protocol Bridging
Enables data exchange between DeviceNet networks and other ControlLogix communication modules (EtherNet/IP, ControlNet, DH+) for comprehensive plant-wide integration.

Delivery, Service & Quality Assurance

Standard catalog items are typically available from stock with expedited shipping options. Custom-configured solutions or large-volume orders require 2-4 weeks lead time depending on specifications and quantity. All products include a comprehensive 12-month warranty covering manufacturing defects and workmanship issues.

We provide remote technical consultation for installation planning, configuration assistance, and troubleshooting support. On-site commissioning services are available in select regions (subject to location and project scope). Each module ships with complete technical documentation including product specifications, installation instructions, wiring diagrams, EDS files, and RSLogix 5000 Add-On Instruction (AOI) examples for rapid integration.

Our technical support team offers application engineering assistance for network design, device configuration, and system optimization to ensure successful project implementation.

Frequently Asked Questions (FAQ)

Q: How do I connect the 1756-DNB/E DeviceNet Bridge Module to my existing ControlLogix system?
A: The module installs directly into any available slot in your 1756 ControlLogix chassis. Connect the DeviceNet network cable to the module's 5-pin terminal block (V+, CAN_H, Shield, CAN_L, V-). Configure the module in RSLogix 5000 by adding it to your I/O Configuration tree and setting the desired baud rate. Use RSNetWorx for DeviceNet software to scan and configure connected devices.

Q: What is the maximum number of DeviceNet devices I can connect through one 1756-DNB/E module?
A: The module supports up to 63 DeviceNet nodes on a single network segment. However, practical device count depends on data exchange requirements, network bandwidth utilization, and update rates. For applications requiring more than 40-50 active devices, consider network segmentation using multiple bridge modules.

Q: What energy savings or performance improvements can I expect with this DeviceNet bridge?
A: While the module itself doesn't directly reduce energy consumption, it enables efficient integration of variable frequency drives and smart devices that can optimize motor control and reduce energy usage by 20-35% in typical applications. Performance improvements include reduced scan times (typically 5-10ms for moderate-sized networks) and improved diagnostic capabilities that minimize unplanned downtime.

Q: What are the environmental requirements for installing the 1756-DNB/E module?
A: The module operates reliably in temperatures from -40°C to 70°C and humidity levels up to 95% non-condensing. It must be installed in a properly rated enclosure (NEMA 12 or IP54 minimum for industrial environments). Ensure adequate ventilation around the ControlLogix chassis and maintain proper grounding to minimize electrical noise interference.

Q: Can I monitor and collect data remotely from DeviceNet devices through this module?
A: Yes, the 1756-DNB/E enables full data access to connected DeviceNet devices through the ControlLogix backplane. Data can be accessed via EtherNet/IP using FactoryTalk View HMI, web-based SCADA systems, or third-party applications. The module supports standard DeviceNet explicit messaging and I/O data exchange, making device parameters and diagnostic information available to supervisory systems. Common protocols for remote access include EtherNet/IP, Modbus TCP (via gateway), and OPC UA.

Q: Is the 1756-DNB/E compatible with legacy DeviceNet devices from other manufacturers?
A: Yes, the module fully complies with ODVA DeviceNet specifications and works with any DeviceNet-conformant device regardless of manufacturer. Ensure you have the appropriate EDS (Electronic Data Sheet) files for third-party devices to enable proper configuration in RSNetWorx for DeviceNet software.

Request Technical Support & Quotation

For detailed application engineering support, custom configuration assistance, or pricing information, please provide the following details: project name and scope, application type and industry, total DeviceNet device count and types, network topology requirements (linear/tree, cable distances), ControlLogix chassis model and available slots, environmental conditions (temperature, enclosure rating), and any special requirements (redundancy, certification needs).

Our application engineers will provide personalized recommendations, system architecture guidance, and competitive quotations within 24-48 hours.

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