Product Short Description
Product Introduction
The ABB NDBU-95C (64008366) is a high-performance digital communication branching unit designed for ABB’s Distributed Drives Communication System (DDCS). It serves as a critical hub for building star-topology communication networks, enabling a single master drive to connect and control up to nine slave drives simultaneously. This unit facilitates high-speed, reliable data exchange between multiple variable frequency drives (VFDs), ensuring precise synchronization and coordinated motion control in complex multi-drive systems. It leverages fiber-optic communication for superior noise immunity and long-distance signal transmission, making it ideal for industrial automation applications requiring robust, real-time drive-to-drive communicationABB.
Description
Technical Specifications
Core Identification
- Model: NDBU-95C
- Part Number: 64008366
- Manufacturer: ABB
- Product Type: DDCS Star Connection Branching Unit
- Compatible Platforms: ABB ACS800, DCS800-S0, DCS800-EP Series Variable Frequency Drives; DDCS Distributed Drive Systems
- Form Factor: Compact module for cabinet/control panel mounting
- Net Weight: 0.45 kg
- Country of Origin: FinlandABB
Communication Specifications
- Communication Protocol: DDCS (Distributed Drives Communication System)
- Transmission Speed: 10 Mbps per port
- Number of Ports: 1 master input port, 9 slave output ports (star topology)ABB
- Interface Type: Fiber-optic (primary) with RS-485 backup option
- Transmission Distance: Up to 1,000 meters (fiber-optic); up to 100 meters (RS-485)
- Isolation Voltage: 2,500 V DC (optical isolation between ports)
- Data Integrity: Built-in error detection and correction mechanisms
Electrical Specifications
- Power Supply: 24 V DC (±10%)
- Power Consumption: < 3 W
- Input Current: ≤ 125 mA at 24 V DC
- Isolation: Full galvanic isolation between communication ports and power supply
Environmental & Mechanical
- Operating Temperature: -10°C to +55°C
- Storage Temperature: -40°C to +85°C
- Relative Humidity: 5–95% RH, non-condensing
- Vibration Resistance: IEC 60068-2-6 compliant
- Shock Resistance: IEC 60068-2-27 compliant
- Protection Rating: IP20 (for indoor cabinet installation)
- Dimensions: 150 mm (L) × 100 mm (W) × 40 mm (D)
- Mounting: DIN rail mounting or direct panel mounting
Certifications & Compliance
- CE Marking
- UL Listed
- RoHS Directive compliance
- EMC compliance: EN 55011, EN 61800-3
Key Features
High-Speed DDCS Communication
- Delivers 10 Mbps data transfer rate for real-time drive-to-drive communication
- Enables sub-millisecond synchronization between multiple drives
- Supports precise speed, torque, and position reference sharing across the network
- Facilitates coordinated motion control for multi-axis systems
- Provides deterministic communication with minimal latency
Star Topology Architecture
- Creates a centralized communication hub with 1 master and 9 slave connectionsABB
- Simplifies network wiring and installation in large drive systems
- Enables independent control of each slave drive from the master
- Supports flexible system expansion by adding slave drives to the network
- Enhances system reliability through isolated port connections
Fiber-Optic Communication Advantage
- Utilizes fiber-optic interfaces for maximum noise immunity in industrial environments
- Eliminates electrical interference and ground loop issues
- Supports long-distance communication up to 1,000 meters
- Provides complete electrical isolation between connected devices
- Ensures secure and reliable data transmission in harsh conditions
Redundant Communication Paths
- Offers dual communication media support (fiber-optic and RS-485)
- Enables automatic failover to backup communication medium
- Provides continuous operation during primary communication failure
- Enhances system availability and fault tolerance
- Supports hot-swapping of communication media without system shutdown
Plug-and-Play Integration
- Automatically detected and configured by connected ABB drives
- Requires minimal configuration for basic operation
- Supports automatic address assignment for slave drives
- Integrates seamlessly with ABB DriveWindow software for configuration
- Provides diagnostic LEDs for quick status monitoring
Robust Industrial Design
- Engineered for continuous operation in demanding industrial environments
- Features wide operating temperature range for versatile deployment
- Implements comprehensive EMC protection for reliable performance
- Constructed with high-quality components for long service life
- Backed by ABB’s global warranty and technical support
Comprehensive Diagnostics
- Provides LED indicators for power, communication status, and fault conditions
- Supports real-time monitoring of network health and port activity
- Generates detailed fault codes for quick troubleshooting
- Enables remote diagnostics via the master drive or DriveWindow software
- Supports proactive maintenance through performance monitoring
Application Scenarios
Multi-Axis Motion Control Systems
- Packaging Machinery: Synchronized control of multiple conveyors, sealing units, and labeling machines
- Printing Equipment: Coordinated control of web feeders, tensioners, and print heads
- Textile Machinery: Synchronized operation of spinning frames, looms, and winding machines
- Plastic Processing: Coordinated control of extruders, calenders, and cutting units
- Woodworking Machinery: Synchronized motion of saws, routers, and material handlers
Material Handling & Conveyor Systems
- Airport Baggage Handling: Coordinated control of multiple conveyor segments
- Logistics Sorting Systems: Synchronized operation of sorting machines and diverters
- Mining Conveyors: Coordinated control of long-distance material transport systems
- Port Cargo Handling: Synchronized operation of cranes, conveyors, and stackers
- Automotive Assembly Lines: Coordinated control of assembly line conveyors and workstations
Process Industry Applications
- Pumping Stations: Coordinated control of multiple pumps in water distribution networks
- HVAC Systems: Synchronized operation of fans, pumps, and dampers in large buildings
- Food & Beverage Processing: Coordinated control of mixing, filling, and packaging lines
- Chemical Processing: Synchronized operation of reactors, mixers, and transfer pumps
- Pharmaceutical Manufacturing: Coordinated control of sterile processing equipment
Metal Processing & Manufacturing
- Steel Rolling Mills: Coordinated control of rolling stands and material handling systems
- Aluminum Extrusion: Synchronized operation of extrusion presses and handling equipment
- Wire & Cable Manufacturing: Coordinated control of drawing, stranding, and coating lines
- Metal Forming: Synchronized operation of presses, brakes, and transfer systems
- Tube & Pipe Manufacturing: Coordinated control of welding, sizing, and cutting units
Marine & Offshore Applications
- Ship Propulsion Systems: Coordinated control of multiple thrusters and propulsion drives
- Dynamic Positioning Systems: Synchronized operation of azimuth thrusters
- Offshore Platforms: Coordinated control of pumping and compression systems
- Cargo Handling: Synchronized operation of winches, cranes, and conveyor systems
- Ballast Water Management: Coordinated control of ballast pumps and valves
Renewable Energy Systems
- Solar Tracking Systems: Coordinated control of multiple solar panel actuators
- Wind Turbine Systems: Synchronized operation of pitch control drives
- Hydroelectric Power Plants: Coordinated control of turbine governing systems
- Energy Storage Systems: Coordinated control of battery charging/discharging inverters
- Smart Grid Applications: Coordinated control of distributed energy resources
Paper & Pulp Industry
- Paper Machines: Coordinated control of forming, pressing, and drying sections
- Pulp Processing: Synchronized operation of digesters, washers, and bleaching systems
- Converting Equipment: Coordinated control of slitting, rewinding, and coating machines
- Recycling Lines: Synchronized operation of pulpers, cleaners, and screening equipment
- Finishing Lines: Coordinated control of calenders, supercalenders, and winders







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