Allen-Bradley 1788-DNBO FlexLogix DeviceNet Daughtercard

Allen-Bradley 1788-DNBO FlexLogix DeviceNet Daughtercard

The Allen-Bradley 1788-DNBO is a high-performance DeviceNet communication daughtercard engineered for seamless integration within FlexLogix 1788 controller platforms. This genuine OEM module delivers robust industrial networking capabilities, enabling real-time data exchange and distributed I/O control across DeviceNet networks in demanding manufacturing and process automation environments.

Technical Specifications

• Model Number: 1788-DNBO
• Power Supply: 5V DC
• Current Draw: 260mA (typical operation)
• Power Consumption: 1.78W (6.1 BTU/Hr thermal dissipation)
• Communication Protocol: DeviceNet (CAN-based industrial network)
• Network Speed: 125 kbps, 250 kbps, or 500 kbps (auto-baud detection)
• Form Factor: Daughtercard module for FlexLogix chassis
• Operating Temperature: 0°C to 60°C (32°F to 140°F)
• Storage Temperature: -40°C to 85°C (-40°F to 185°F)
• Relative Humidity: 5% to 95% non-condensing

DeviceNet Network Capabilities

The 1788-DNBO module provides comprehensive DeviceNet master/slave functionality:

• Multi-Master Support: Operates as master or slave node, enabling flexible network topologies
• Auto-Baud Detection: Automatically detects network speed (125k, 250k, or 500k baud) for simplified commissioning
• Explicit Messaging: Supports configuration, diagnostics, and parameter upload/download
• I/O Messaging: Real-time cyclic data exchange for process control and monitoring
• Node Addressing: Configurable MAC ID from 0-63 via rotary switches or software
• Network Diagnostics: Built-in LED indicators for power, network status, and communication activity

Application Scenarios

The 1788-DNBO daughtercard excels in diverse industrial automation applications:

• Distributed I/O Systems: Connect FlexLogix controllers to remote I/O blocks, reducing wiring costs by up to 70% compared to hardwired solutions
• Machine Control: Integrate sensors, actuators, drives, and HMIs on a single DeviceNet trunk for coordinated machine operation
• Assembly Lines: Link multiple FlexLogix controllers for synchronized production sequencing and material handling
• Packaging Equipment: Interface with DeviceNet-enabled servo drives, vision systems, and barcode scanners for high-speed packaging operations
• Conveyor Systems: Monitor and control distributed conveyor sections with real-time status feedback and fault detection
• Material Handling: Coordinate AGVs, robotic cells, and storage systems through DeviceNet communication

Installation & Configuration

The 1788-DNBO installs directly into FlexLogix 1788 controller chassis without external power requirements. Configuration is performed using RSLogix 5000 programming software (version 10.0 or later) or Studio 5000 Logix Designer. The module supports Electronic Data Sheet (EDS) files for simplified device integration and parameter configuration.

Network Topology Flexibility

DeviceNet supports multiple physical topologies to match your application requirements:

• Trunk-Line/Drop-Line: Standard topology with main trunk cable and drop cables to individual devices
• Daisy-Chain: Direct device-to-device connections for compact installations
• Star Configuration: Centralized wiring through junction boxes for easy troubleshooting
• Mixed Topology: Combine topologies within a single network for maximum flexibility
• Cable Length: Up to 500 meters at 125 kbps, 250 meters at 250 kbps, 100 meters at 500 kbps

Diagnostic Features

Comprehensive diagnostic capabilities accelerate troubleshooting and minimize downtime:

• LED Indicators: Visual status for module power, network communication, and fault conditions
• Network Health Monitoring: Track bus-off events, CRC errors, and duplicate MAC ID conflicts
• Device Profiles: Support for standard DeviceNet device profiles ensures interoperability
• Online Editing: Modify network parameters without stopping the controller program
• Fault Logging: Capture and timestamp communication errors for root cause analysis

Performance Advantages

Deploying the 1788-DNBO module delivers measurable operational benefits:

• Reduced Wiring Costs: Single network cable replaces hundreds of discrete I/O wires
• Faster Commissioning: Auto-configuration features reduce startup time by 50%
• Enhanced Diagnostics: Network-level visibility enables predictive maintenance strategies
• Scalability: Add up to 64 nodes per network segment without controller modifications
• Vendor Interoperability: Connect devices from multiple manufacturers using standard DeviceNet profiles

Quality & Compliance

Every 1788-DNBO module undergoes rigorous factory testing to ensure compliance with Allen-Bradley quality standards and DeviceNet conformance requirements. The module is certified to UL, CSA, and CE standards for global deployment. Backed by comprehensive technical support and genuine OEM warranty coverage.

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