The IS200VSVOH1B serves as a specialized VME-based servo control interface within the GE Mark VI and Mark VIe Speedtronic turbine control systems. This board provides the critical link between the digital controller and electro-hydraulic servo valves. It manages high-precision valve positioning for both gas and steam turbines.
This module controls four independent servo channels. It utilizes Linear Variable Differential Transformer (LVDT) feedback to monitor valve position. The board also processes pulse rate inputs for flow measurement. This dual-input capability ensures accurate fuel and steam regulation across varying operational loads.
The hardware architecture supports both Simplex and Triple Modular Redundant (TMR) configurations. In TMR setups, the card works with TSVO or DSVO terminal boards. This synchronization facilitates fault-tolerant operation and continuous system availability. The board features a single-slot VME design with a conformal-coated PCB to withstand harsh industrial environments.
Key Technical Specifications
| Feature | Specification |
| Manufacturer | General Electric (GE) |
| Model Number | IS200VSVOH1B |
| Control System | Mark VI / Mark VIe |
| Slot Occupancy | Single VME Slot |
| Servo Channels | 4 Independent Channels |
| Feedback Types | LVDT Position / Pulse Rate Flow |
| Onboard Relays | 4 Magnetic Relays (K1–K4) |
| Diagnostic LEDs | Run (Green), Fail (Red), Status (Orange) |
| Dimensions | 2.1 cm x 18.8 cm x 26.2 cm |
| Weight | 0.36 kg |
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