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The GE IS200DSVOH1A Simplex DIN-rail Mounted Servo Terminal Board (DSVO) is a critical Printed Circuit Board (PCB) designed for use in the GE Mark VI Speedtronic Turbine Control System.1
Its primary function is to serve as a compact, field-wiring interface for electro-hydraulic servo mechanisms, which are used to control the position of critical valves (like steam or fuel valves) in gas and steam turbines.2
⚙️ Key Functions and Technical Specifications
The DSVO board provides the necessary I/O connectivity to link the field devices to the main Mark VI control system’s processor board.
| Feature | Details |
| System | GE Mark VI Speedtronic Turbine Control System |
| Function | Simplex (Non-redundant) Servo Terminal Board |
| Processor Interface | Connects to the VSVO (Servo Valve I/O) processor board via a 37-pin cable. |
| Servo Outputs | Provides two servo valve outputs. |
| Position Feedback | Accommodates up to six LVDT (Linear Variable Differential Transformer) position sensors for accurate valve position feedback. |
| Rate Inputs | Includes two active pulse rate inputs, typically used for flow measurement applications. |
| Current Control | Allows selection of servo coil currents ranging from 10 to 120 mA using onboard jumpers. |
| Mounting | Designed for DIN-rail mounting (hence the “DIN-rail Mounted” in its name) to save cabinet space and simplify installation. |
| Connections | Features high-density Euro-Block type terminal blocks for connecting field wiring (typically #18 AWG shielded twisted pair). |
The IS200DSVOH1A is the Simplex version of this terminal board, meaning it is intended for use in non-redundant control systems, though its design and functions are similar to those found on the larger, more fully-featured TSVO (TMR Servo Terminal Board).3
