GE IS200VSVOH1BDC VSVO Servo Valve Control Board

The IS200VSVOH1BDC (VSVO) is a dedicated servo control board for GE Speedtronic Mark VI turbine control system, responsible for closed-loop regulation of electro-hydraulic servo valves. It receives valve position setpoints from the main CPU, outputs high-precision drive signals to fuel/steam servo valves, and collects LVDT position feedback to form high-speed closed-loop control for gas and steam turbine load adjustment.

This VME single-slot pluggable board matches TSVO servo terminal baseplates, fully conformal coated PCB adapts to high-temperature, vibration turbine workshop environments. It supports both 2-coil and 3-coil servo valves, compatible with active/passive speed sensors, and enables hot-swap replacement without rack shutdown to avoid unit unplanned outage.

Main Specifications

• Brand: GE General Electric; Model: IS200VSVOH1BDC; Series: Speedtronic Mark VI Turbine DCS
• Servo Channels: 4 independent servo valve drive channels, split for two TSVO terminal bases
• Valve Compatibility: 2-coil / 3-coil electro-hydraulic servo valves, LVDT position feedback input
• Pulse Input Range: 2Hz ~ 14kHz, supports active and passive turbine speed pickup sensors
• Backplane Bus: Standard VME bus, high-speed real-time data interaction with main control CPU
• Power Consumption: Low power VME rack supply, single slot standard rack installation
• Environment: Operating -20℃ ~ +65℃, 5%–95% RH non-condensing, vibration resistant design
• Diagnostics: 3 front panel LED indicators for running status, fault alarm and communication status
• Certifications: CE, UL industrial compliance, meets power generation turbine safety control standards

Core Functions

• Receive turbine fuel and steam valve opening commands from Mark VI main controller, output proportional drive current to servo actuators.
• Real-time collection of LVDT valve position feedback signals, automatically adjust drive output to eliminate position deviation and realize precise closed-loop control.
• Built-in signal filtering circuit suppresses electromagnetic interference from turbine rotating machinery to guarantee stable valve control accuracy.
• Detect servo valve coil short/open circuit, LVDT wire break and signal loss faults, upload alarm information to system HMI instantly.
• Hot-swappable modular design allows independent board replacement without cutting power to the whole turbine control rack.
• High-speed pulse frequency sampling captures turbine rotor speed signals for overspeed protection and load regulation logic judgment.

Application Scenarios

• Servo control spare replacement for GE Mark VI gas turbine and steam turbine control racks in combined cycle power plants.
• Fuel valve regulation spare parts for petrochemical large centrifugal compressors and offshore platform power generation units.
• Maintenance backup inventory for waste heat power stations, industrial furnace power generation auxiliary control cabinets.
• Matching servo board paired with Mark VI main CPU, TSVO terminal bases and LVDT valve position sensors.
• Retrofit replacement components for aging turbine control systems with valve position drift and servo drive failure faults.

• Global aftermarket spare stock for power generation maintenance teams managing legacy GE Speedtronic turbine control equipment worldwide.