GE IS200VSVOH1B — In-Stock Industrial Servo Control Module (Mark VI / Mark VIe)
GE IS200VSVOH1B — In-Stock Industrial Servo Control Module (Mark VI / Mark VIe)
1. Product Introduction
The GE IS200VSVOH1B is a servo control / variable speed valve output module designed and manufactured by General Electric (GE) for use in their Mark VI and Mark VIe Speedtronic turbine control systems. It is part of the IS200 series of modules and plays a critical role in controlling electro-hydraulic valves on large industrial turbines or similar high-precision actuators in heavy automation.
This unit is widely used in turbine control racks (VME backplane) to drive multiple servo valves and handle position feedback signals. It is engineered for high reliability, closed-loop control, and precise actuation in demanding process environments such as power generation, petrochemical plants, and other industrial automation systems.
2. What It Does
The IS200VSVOH1B module serves as a servo valve output board that receives control signals from a Mark VI/Mark VIe controller and generates precise current outputs to drive electro-hydraulic servo valves. These valves are typically responsible for controlling critical elements such as fuel flow, steam inlet vanes, or bypass valves in turbine systems — where accurate positioning and responsiveness are essential.
Key operational functions include:
Converting low-power command signals into high-current outputs for valves.
Performing closed-loop control using position feedback (e.g., from LVDT sensors) to ensure the actual valve position matches the commanded setpoint.
Supporting both Simplex and Triple Modular Redundant (TMR) configurations depending on system safety and reliability requirements.
These capabilities make it a core control element in critical automation systems where turbine performance, efficiency, and safety are priorities.
3. Technical Specifications
The IS200VSVOH1B is a VME-based servo control board that plugs into the turbine control rack. The following outlines its typical capabilities and hardware features:
General Information
| Specification | Details |
|---|---|
| Model | GE IS200VSVOH1B |
| Manufacturer | General Electric (GE) |
| Series | Mark VI / Mark VIe Speedtronic |
| Product Type | VME Servo Control / Variable Speed Valve Output Module |
| System Compatibility | GE Mark VI / Mark VIe turbine control systems |
| Deployment | Industrial turbine control racks (VME backplane) |
Functional Capabilities
| Feature | Description |
|---|---|
| Control Output | Drives electro-hydraulic servo valves based on control setpoints |
| Feedback Support | Reads valve position feedback via sensors like LVDT |
| Channels | Up to 4 servo control channels per board (varies by setup) |
| Interface | VME rack backplane connectivity |
| Integration | Works with GE controllers & I/O modules for closed-loop control |
| Redundancy | Supports Simplex and Triple Modular Redundant (TMR) configurations |
Environmental & Physical
| Category | Parameter |
|---|---|
| Operating Temperature | Industrial range suited for turbine hall environments |
| Mounting | VME rack installation |
| Front Panel | Includes LED indicators (run, fault, status) and J5 connector |
| Connectors | Multiple backplane and external interface points |
Note: Some details like exact current ranges, channel counts, or installation specifics may vary depending on system configuration and how the module is used with associated terminal boards (TSVO / DSVO).
4. Key Features and Functionality
Precision Valve Control
The IS200VSVOH1B board uses high-resolution outputs and control logic to drive servo valves accurately based on command signals received from the turbine controller. This ensures precise positioning of valves that regulate critical process parameters like turbine fuel, steam admission, or bypass flows.
Closed-Loop Feedback
The module supports position feedback from devices such as LVDT (Linear Variable Differential Transformer) sensors, enabling real-time adjustment of valve position and ensuring the final position matches the intended control setpoint.
Redundancy and Reliability
Depending on the installation and system safety requirements, IS200VSVOH1B can operate in simplex mode for standard control or in Triple Modular Redundant (TMR) configurations for enhanced reliability. In TMR setups, three modules operate in parallel, and a voting mechanism ensures correct operation even if one unit fails.
Diagnostic and Status Indicators
The front panel of the board typically includes LED indicators for power, run, and fault conditions. These provide immediate visual status feedback for maintenance and troubleshooting.
5. Typical Application Scenarios
This module is designed for use in industrial turbine and process control systems, especially where precision actuation and high availability are necessary. Common application areas include:
Power generation plants – Gas turbines, steam turbines, combined cycle units controlled by Mark VI/VIe systems.
Petrochemical and refinery automation – Precise actuation of control valves in continuous processes.
Heavy industrial automation – Critical motion control tasks integrated into larger distributed control system (DCS) architectures.
Its integration into GE’s turbine control ecosystem enables real-time control loop performance, which is essential for maintaining turbine efficiency, process stability, and safety.
6. Availability and Purchasing
The GE IS200VSVOH1B is commonly available in stock from industrial automation parts suppliers and often shipped globally to support service, maintenance, or upgrade projects. Due to its key role in turbine control, many suppliers keep this module in inventory to reduce lead times for customers maintaining Mark VI/VIe fleets.
Pricing varies by supplier and condition (new, refurbished, or exchange), but competitive options exist, and stock availability helps minimize project delays.
7. Summary
The GE IS200VSVOH1B is a reliable, industrial-grade servo control module for Mark VI/Mark VIe turbine control systems. It provides:
High-precision servo output for valve positioning.
Closed-loop feedback control with sensor integration.
Support for fault-tolerant and redundant configurations.
Compact VME rack form factor suitable for turbine automation racks.
This makes it a critical module for power generation, heavy industrial automation, and process control systems where accuracy and system uptime are key priorities.