The GE General Electric IS200TSVCH1A is a Servo Input/Output Terminal Board, also identified by the functional acronym TSVC, designed for GE Mark VIe turbine control systems. The board provides the field-side interface for electro-hydraulic servo valve control, LVDT valve-position feedback, and pulse-rate signal inputs. It works with the PSVO I/O pack and WSVO servo driver and supports simplex, dual, and TMR control configurations. The board has two 24-position terminal blocks for field wiring, conformal-coated PCB construction, and dedicated servo and position-feedback circuitry. The related assembly number IS200TSVCH1AAA is associated with the IS200TSVCH1A board.

Product Datasheet

Key Features

• GE IS200-series Servo I/O Terminal Board
• Functional acronym TSVC
• Designed for Mark VIe turbine control applications
• Two electro-hydraulic servo valve output channels
• Eight LVDT feedback inputs
• Four isolated LVDT excitation outputs
• Two non-isolated LVDT excitation outputs
• Two pulse-rate signal inputs
• Two 24-position field terminal blocks
• Conformal-coated PCB
• Compatible with PSVO I/O pack and WSVO servo driver
• Supports simplex, dual, and TMR control architectures
• Suitable for turbine control system maintenance and replacement

Common Questions & Answers

Q: What is the GE IS200TSVCH1A?
A: It is a GE Mark VIe Servo Input/Output Terminal Board used to interface servo valves, LVDT position sensors, and pulse-rate signal devices.

Q: What does the TSVC board control?
A: It provides interface circuitry for two servo valve channels and receives valve-position feedback through LVDT sensors.

Q: How many LVDT inputs are available?
A: The published specifications identify eight LVDT winding inputs.

Q: Which I/O pack is compatible with this board?
A: The IS200TSVCH1A is designed to work with the PSVO I/O pack and WSVO servo driver. It is not intended for use with the VSVO processor.

Q: Does it support redundant control configurations?
A: Yes. The board can be used in simplex, dual, and TMR configurations.

Q: Is the IS200TSVCH1A discontinued?
A: Current product references identify the GE IS200TSVCH1A as discontinued/legacy hardware.

Troubleshooting & Safety

• Confirm the complete part number and assembly number before replacement.
• Verify compatibility with the installed PSVO I/O pack and WSVO servo driver.
• Match the board to the correct Mark VIe rack and control configuration.
• Inspect terminal blocks, connectors, jumpers, and PCB components before installation.
• Verify all servo valve and LVDT wiring against the system drawings.
• Check pulse-rate input wiring and shielding when signal diagnostics indicate an input problem.
• Inspect the board for contamination, corrosion, cracked components, or damaged terminals.
• Use proper ESD protection when handling the PCB.
• Remove and isolate system power before installing or removing the terminal board.
• Follow applicable GE Mark VIe turbine-control maintenance procedures.

Recommended GE Mark VI / Mark VIe Models

1. GE IS220PSVOH1A – Servo I/O Pack
2. GE IS210WSVOH1A – Servo Terminal / Driver Assembly
3. GE IS200WSVOH1A – Servo Terminal Board
4. GE IS200STAIH2A – Simplex Analog Input Terminal Board
5. GE IS200STCIH1A – Contact Input Terminal Board
6. GE IS200TRTDH1D – RTD Input Terminal Board
7. GE IS200TVBAH2A – Vibration Terminal Board
8. GE IS200SSCAH2A – Serial Communication Terminal Board
9. GE IS200PTVOH1A – PT/CT Voltage and Current Interface Board
10. GE IS200SPIDG1A – Simplex Pulse Input Terminal Board
11. GE IS200SRTDH2A – RTD Terminal Board
12. GE IS200TBAIH1A – Analog Terminal Board
13. GE IS200TBCIH2A – Contact Input Terminal Board
14. GE IS200TDBTH2A – Digital Terminal Board
15. GE IS200TVIBH2A – Vibration Input Terminal Board