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ABB NDBU-95C Star Connection Branch Unit 

Product Overview

The ABB NDBU-95C is a star connection branch unit designed for distributing DDCS (Drive Control and Communication System) protocol control links to multiple drives in industrial automation systems. This branching unit plays a critical role in creating star topology networks for drive control applications .

Technical Specifications

General Parameters

• Brand: ABB

• Model: NDBU-95C (alternative part number: 3AFE64008366)

• Type: Star connection branch unit

• Protocol Support: DDCS (Drive Control and Communication System)

• Power Supply: Typically 24V DC

• Operating Temperature: 0°C to +65°C 

• Weight: 0.69kg 

• Dimensions: Varies by configuration (typically compact industrial module size) 

Electrical Characteristics

• Isolation Voltage: 500V AC test voltage 

• Connection Type: Optical ModuleBus port (when used with TB810/TB811 modules) 

Key Features

1. Star Topology Support: Enables distribution of control signals to multiple drives in a star configuration 

2. High Reliability: Designed for stable operation in industrial environments with robust construction 

3. System Integration: Works with various ABB control components including:

   • AC80 application controllers

   • DriveWindow software on PCs

   • Fieldbus Communication Interface (FCI, type CI810) 

4. Optical Communication: Supports optical ModuleBus connections when used with TB810/TB811 modules 

5. Compact Design: Space-saving form factor suitable for control cabinet installation 

Application Fields

1. Industrial Drives: Distribution of control signals to multiple ABB drives in manufacturing plants 

2. Process Automation: Integration of drive systems in continuous process industries 

3. Power Systems: Control of multiple drives in power generation and distribution 

4. Material Handling: Conveyor systems and other multi-drive applications 

System Integration

The NDBU-95C is designed to work with:

• ABB AC80 controllers

• DriveWindow software on PCs

• Fieldbus Communication Interfaces (CI810)

• TB810/TB811 Optical ModuleBus Port modules 

Installation and Operation Notes

1. Safety Precautions: Follow all safety instructions in the product manual to prevent serious faults or injuries 

2. Network Configuration: Properly configure the star topology for optimal signal distribution 

3. Environmental Conditions: Maintain operating temperature within specified range 

4. Maintenance: Periodically inspect connections and module status 

The structure and details of the product：

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