Product Core Summary
- Model: HN800+VBX01B
- Manufacturer: ABB
- Core Function: Provides high-speed fiber optic parallel bus connection for synchronization and data exchange between multiple drive units in common DC bus configurations.
- System Compatibility: Compatible with ACS800 and ACS880 series frequency converters, particularly in multi-drive and master-follower setups.
- Supply Status: Obsolete spare part, available through verified global sourcing channels.
- Warranty Standard: 12-month functional warranty, fully tested.
Key Technical Specifications
- Product Model: HN800+VBX01B
- Manufacturer: ABB
- System Platform: ACS800 / ACS880
- Communication Type: Fiber optic DDCS protocol (Distributed Drive Communication System), supporting point-to-point and ring topologies.
- Data Transfer Rate: 10 Mbit/s, enabling low-latency synchronization critical for load sharing accuracy.
- Number of Channels: 8 transmit + 8 receive fiber optic pairs, allowing parallel connection of up to 10 drive units.
- Fiber Type: Multimode 62.5/125 µm or 50/125 µm with ST connectors, providing robust noise immunity over distances up to 1000 m.
- Power Supply: 5 VDC internal from drive backplane, with low consumption <2 W.
- Isolation: Galvanic isolation via optical transmission, eliminating ground loops in high-power installations.
- Operating Temperature Range: -10°C to +70°C, suited for drive cabinet environments.
- Humidity Tolerance: 5–95% non-condensing, preventing condensation-related failures.
- Vibration Resistance: 1g at 5–150 Hz per IEC 60068-2-6, ensuring reliability in mechanically stressed applications.
- Diagnostic Features: LED indicators for channel status and link integrity, simplifying field troubleshooting.
- MTBF: >500,000 hours, reflecting proven long-term performance in continuous operation.
- Certifications: CE, UL recognized component, compliant with IEC 61800-5-1 for adjustable speed electrical power drive systems.
Technical Architecture & Functional Positioning
This module operates at the communication layer within multi-drive systems, enabling precise coordination between inverter units sharing a common DC bus. It extends the internal parallel bus via fiber optics, transforming electrical signals into optical for transmission between physically separated drives.
The core technology is ABB’s proprietary DDCS protocol over fiber, which supports deterministic data exchange for functions like torque reference distribution, speed synchronization, and fault propagation. Each channel carries dedicated signals, ensuring sub-millisecond latency essential for load sharing accuracy in applications with mechanical coupling. Optical isolation inherently rejects electromagnetic interference common in high-voltage drive environments, preventing signal corruption that could lead to torque oscillations or system trips.
From a systems perspective, the engineering value is substantial in large installations. It allows scalable architectures where one master drive controls multiple followers, reducing cabling complexity compared to analog references and improving response times. In retrofit scenarios, it facilitates integration of newer ACS880 units with legacy ACS800 systems, extending equipment life without full replacement. This design directly addresses challenges in industries requiring tight coordination, such as paper machines or test benches, where even minor phase shifts impact product quality or test validity.
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