Description
Key Technical Specifications
- Model Number: IS200VSVOH1B
- Manufacturer: GE Industrial Systems
- Series/System: Mark VI / Mark VIe Speedtronic
- Board Type: VME Servo Control Board
- Servo Channels: 4 Independent Electro-Hydraulic Channels
- Feedback Type: LVDT Position & Pulse Rate Flow
- LVDT Excitation: 3.2 KHz Sinusoidal Signal
- Pulse Rate Input: 2 to 14,000 Hz Frequency Range
- System Redundancy: Supports TMR (Triple Modular Redundant) & Simplex
- Connectors: J5 Front Panel, J3/J4 Rack, JR1/JS1/JT1 Terminal
Functional Role & Application Analysis
The IS200VSVOH1B serves as the critical execution interface within the GE Mark VI turbine control architecture. It translates digital control algorithms into precise mechanical movement. The board directly drives four electro-hydraulic servo valves that regulate fuel and steam flow. Without this module, the turbine lacks physical actuation. It continuously monitors valve position using LVDT feedback and verifies flow rates via pulse inputs. This closed-loop control ensures the turbine responds accurately to load demands while maintaining safe operating parameters.
Typical applications for this module include:
- Gas Turbine Fuel Control: Regulating primary and secondary fuel valves to maintain precise combustion temperatures and rotor speeds.
- Steam Valve Actuation: Managing inlet and extraction steam valves on steam turbines for power generation and industrial process heating.
- Legacy System Maintenance: Replacing failed servo cards in older Mark VI and Mark VIe turbine control racks to prevent extended plant downtime.
Our Quality Standard & Testing Process
We know that a failed servo card can force an unplanned turbine trip. The cost of that downtime dwarfs the price of the spare part. We enforce a strict, multi-stage validation protocol to guarantee every IS200VSVOH1B we ship operates exactly as specified.
- Visual & Component Inspection: Technicians inspect the PCB for physical damage, verify solder joint integrity, and check all 70+ integrated circuits and passive components for degradation.
- Live System Test: The board is installed in a live Mark VI test rack and run for a minimum of 24 hours to validate continuous VME bus communication and thermal stability.
- Full-Function Diagnostics: We inject 3.2 KHz LVDT signals and pulse rate inputs across all four channels to verify closed-loop servo current output accuracy and suicide relay logic.
- Warranty Backing: Only units that pass every diagnostic checkpoint are approved for shipment, backed by our comprehensive 12-month warranty.
GE-IS200VSVOH1B
Compatibility & Migration Paths
Do not assume all IS200VSVOH1B boards are drop-in replacements. Hardware revisions and terminal board configurations vary. Verifying these parameters before ordering prevents costly installation failures and commissioning delays.
- Firmware/Hardware Revisions: Check your existing Mark VI controller firmware. Older firmware versions may require a specific hardware revision of the VSVO board to recognize LVDT scaling parameters correctly.
- Required Components: This board must mate with TSVO or DSVO servo terminal boards. The JR1, JS1, and JT1 connectors contain ID chips; mismatched terminal boards will trigger a hardware incompatibility fault.
- Replacement & Alternatives: Verify if your application requires TMR or Simplex configuration. While the base board is identical, internal strapping and firmware parameters differ. Confirm your exact system topology.
- Get Expert Help: Unsure about your system’s exact requirements? Contact our technical team today for a free compatibility check and configuration review.
