GE IS200TSVOH1B Servo Terminal Board

Configured for electro-hydraulic servovalve management and valve position feedback in Mark VI turbine control systems, the GE IS200TSVOH1B (IS200TSVOH1B Servo Terminal Board) provides direct physical and electrical execution of valve control and Linear Variable Differential Transformer (LVDT) signal processing.

Hardware Specifications

Profinet / EtherNet/IP Deterministic Networks

The IS200TSVOH1B serves as the interface node for hydraulic valve control, connecting directly to VSVO I/O processors within the Mark VI rack. The board architecture facilitates deterministic backplane bus communication velocity, ensuring that valve position updates and control commands maintain synchronization with turbine speed regulation loops. Firmware flash compatibility is managed via the host I/O pack, ensuring that control logic transitions for steam and fuel valves remain within operational safety parameters. I/O density scaling is achieved through configurable connector routing (JR1 for Simplex, or JR1/JS1/JT1 for TMR), allowing the board to integrate seamlessly into diverse control topologies. The module ensures precise current output to up to three coils per servo output, with jumper-selectable current ranges (JP1-6) to support varying hydraulic actuator requirements.

Frequently Asked Questions

Q: Can the IS200TSVOH1B be hot-swapped while the turbine control system is active?

A: No. Replacement of this terminal board must be performed with the turbine system de-energized to prevent uncommanded valve movement or electrical faults on the servovalve circuitry.

Q: How is the TMR configuration managed for servovalve outputs?

A: In TMR mode, the three coils are driven via the JS1, JT1, and JR1 connectors. Ensure that jumper settings (JP1-6) are verified for each individual coil current before commissioning the valve control loop.

Field Installation Guidelines

1. Mounting: Secure the board in the control cabinet using the designated mounting points. Ensure the chassis ground connection is established to support the integrated shield termination strips.
2. Wiring: Terminate servovalve and LVDT wiring to the 24-terminal I/O blocks using wire up to #12 AWG. Ensure that all field cable shields are terminated directly to the adjacent shield strip to minimize common-mode electrical noise.
3. Trip Configuration: Connect external trip signals from the protection module to the JD1 or JD2 connectors. Verify signal polarity and logic state before system power-up.
4. Current Selection: Set the JP1-6 jumpers to match the specific current requirements of the servovalve coils. Confirm these settings against the valve manufacturer's documentation to prevent coil overheating or insufficient control force.
5. Verification: Prior to system operation, perform a manual valve stroke test via the Mark VI diagnostic interface. Verify that the LVDT position feedback accurately corresponds to the valve stroke and that the servovalve current response is within the designated control range.