Description
Hardware and Performance Specifications Auxiliary supply: Powered by VME rack back‑plane, no external power supply required Power consumption: ≤7 W Supported bus protocol: ABB proprietary MasterBus 300 Core function: Bus signal regeneration, galvanic isolation, communication distance extension Mounting mode: VME Eurocard plug‑in board for Advant subrack Protection class: IP20 Operating temperature: −20 ℃ ~ +70 ℃ Storage temperature: −40 ℃ ~ +85 ℃ Humidity: 5‑95 %RH non‑condensing EMC compliance: Comply with IEC 61000‑4 series industrial electromagnetic‑compatibility standards Dimension & weight: approx. 324 × 234 × 22.5 mm, weight approx. 0.40 kg Certifications: CE approval
Main Functions Regenerate and reshape MasterBus 300 bus signals to extend effective communication transmission distance. Provide galvanic isolation between different bus segments to suppress ground‑loop interference in industrial field environments. Support multi‑cluster S100 I/O sub‑rack cascading connection within Advant DCS system. Detect bus communication errors and segment fault status. Front‑panel LED indicators display power‑on status, bus traffic activity and hardware fault alarm codes for on‑site inspection. Hardware self‑diagnosis detects internal circuit faults and bus segment failures, and reports fault information to the main controller. Parameter configuration and bus‑link diagnosis are completed by ABB Advant engineering software.
Installation Requirement Plug‑in installation inside Advant VME controller subrack. Bus communication cables shall adopt shielded twisted‑pair and be strictly separated from high‑voltage power cables. Ensure reliable cabinet protective grounding. After module replacement, confirm full part‑number DSBC176 / 3BSE019216R1 matches original project configuration. Perform bus‑segment communication test and verify data exchange between controller and distributed S100 I/O clusters. Different hardware revisions cannot be directly interchanged without configuration adaptation. Do not put into service until no hardware self‑diagnosis fault alarm exists.
Typical Application Scenarios Bus‑extender‑board spare part for ABB Advant OCS / MasterPiece AC400 automation‑control systems; widely used for distributed S100 I/O bus extension in thermal‑power plants, hydropower plants and petrochemical industries; applied for legacy DCS‑PLC system maintenance and spare‑part replacement.
Key Features
- Dedicated MasterBus 300 bus extender for Advant DCS systems, implements signal regeneration and long‑distance bus extension.
- Built‑in galvanic‑isolation design, improves anti‑interference capability for distributed I/O communication networks.
- Supports multi‑cluster S100 I/O cascading, flexible for large‑scale distributed I/O layout.
- VME Eurocard plug‑in structure, back‑plane powered, convenient for on‑site replacement and maintenance.
- Strict full‑part‑number matching required for spare‑part replacement; cannot be directly substituted by DSBC172 without configuration adaptation.




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