Description
Product Description
The IS200TSVOH1B is a General Electric Mark VI Servo Termination Board used in turbine control applications for interfacing electro-hydraulic servo valves and valve-position feedback devices. The TSVO board works with the Mark VI servo control architecture and provides field termination for servo current signals and LVDT/LVDR feedback. The board uses barrier-type terminal blocks and can accommodate feedback connections for multiple LVDT/LVDR windings. In applicable configurations, it interfaces with the VSVO servo control circuitry and supports simplex or redundant system arrangements through the appropriate connectors. The supplied identifier IS200TSVOH1BAA is an assembly-level variant associated with the IS200TSVOH1B board family.
Product Datasheet
| Parameter | Specification |
|---|---|
| Brand | General Electric (GE) |
| Model | IS200TSVOH1B |
| Assembly Variant | IS200TSVOH1BAA |
| Functional Acronym | TSVO |
| Series | Mark VI / IS200 |
| Product Name | Servo Termination Board |
| Product Type | Servo Valve Termination / Interface Board |
| Primary Application | Gas and steam turbine control |
| Servo Valve Interface | Up to 2 servo current channels |
| Feedback Interface | LVDT / LVDR valve-position feedback |
| LVDT/LVDR Capacity | Up to 3 feedback windings per terminal block |
| Terminal Blocks | 2 barrier-type terminal blocks |
| Feedback Selection | High / Median / Low select, application-dependent |
| Control Interface | Compatible Mark VI servo control / VSVO architecture |
| Simplex Interface | JR1, application-dependent |
| Redundant Interface | JR1 / JS1 / JT1, application-dependent |
| Configuration | Hardware and system dependent |
| PCB Coating | Conformal coating |
| Board Family | IS200 |
| Origin | USA |
| Dimensions | Approx. 37 × 30 × 4 cm, depending on assembly |
| Weight | Approx. 0.5 kg |
| Condition | Verify actual item condition |
| Discontinued | Legacy Mark VI component; verify current availability |
Functional Features
- Provides servo-valve field termination within the GE Mark VI turbine control system.
- Interfaces up to two electro-hydraulic servo valve current channels in applicable configurations.
- Supports LVDT/LVDR feedback used to monitor turbine valve position.
- Each terminal block can accommodate multiple LVDT/LVDR feedback windings for applicable sensing architectures.
- Uses barrier-type terminal blocks for field wiring.
- Works with the Mark VI VSVO servo-control architecture.
- Supports simplex and applicable redundant configurations through different connector arrangements.
- Provides a dedicated interface between control electronics and turbine servo-valve/feedback wiring.
- Conformal-coated PCB construction is used on documented versions of the board.
FAQ
Q: What is the IS200TSVOH1B used for?
A: It is a Mark VI Servo Termination Board used to connect servo valves and valve-position feedback devices to the turbine control system.
Q: What type of feedback does the TSVO support?
A: The board supports LVDT and LVDR feedback used for valve-position measurement.
Q: How many servo valves can it interface with?
A: The documented architecture supports two servo current channels for applicable servo-valve configurations.
Q: What is the relationship between IS200TSVOH1B and IS200TSVOH1BAA?
A: IS200TSVOH1BAA is an assembly-level identifier associated with the IS200TSVOH1B TSVO board family. The complete board markings should be matched when ordering a replacement.
Q: Is the IS200TSVOH1B the same as IS200TSVCH1A?
A: No. Both are Mark VI servo-related terminal boards, but they perform different interface functions. The exact application should be checked before substitution.
Q: Can this board be used in a TMR system?
A: The TSVO family supports applicable redundant configurations, but the required connector arrangement and associated control hardware depend on the specific Mark VI system design.
Troubleshooting & Safety
- Confirm the complete IS200TSVOH1B / IS200TSVOH1BAA identification before replacement.
- Record all existing terminal connections and jumper settings before removing the original board.
- Verify servo-valve wiring, polarity, and feedback connections against the turbine wiring documentation.
- Check LVDT/LVDR feedback wiring if valve-position readings are unstable or incorrect.
- Inspect the two terminal blocks and board connectors for loose wires, corrosion, or damaged contacts.
- Do not change jumper or configuration settings without confirming the required Mark VI application settings.
- Servo control circuits can operate at hazardous voltages and may control high-energy hydraulic equipment.
- Isolate the turbine control and hydraulic systems according to site procedures before servicing.
- Follow lockout/tagout requirements and verify that stored electrical and hydraulic energy has been safely discharged.
- Replacement hardware should match the original board revision and system architecture before commissioning.
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