Description
Overview
The IS200VSVOH1B VME Interface Card is a servo‑control and communication module engineered by General Electric for the Mark VI/Mark VIe turbine control platform. Designed to manage electro‑hydraulic valve actuation with high precision, this board processes LVDT feedback, pulse‑rate flow signals, and relay‑based outputs to support accurate fuel and steam valve positioning in gas and steam turbine systems.
Functional Characteristics
This single‑slot VME module incorporates a robust control architecture capable of driving up to four servo valves. It conditions LVDT excitation signals, interprets position feedback, and processes pulse‑rate inputs used for flow measurement. The IS200VSVOH1B supports both simplex and Triple Modular Redundant (TMR) configurations, enabling fault‑tolerant operation in mission‑critical turbine applications.
The board includes:
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Six internal connectors (P1–P6)
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Four onboard relays (K1–K4)
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More than 70 integrated circuits
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Ten inductor beads for noise suppression
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Multiple test points for diagnostics
A conformal‑coated PCB protects components from moisture, dust, and corrosive atmospheres commonly found in turbine enclosures.
Front‑Panel Features
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J5 communication connector
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Three LED indicators: RUN (green), FAIL (red), STATUS (orange)
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VME handle and locking hardware for secure installation
These indicators provide immediate operational feedback and simplify troubleshooting.
System Integration
In TMR systems, the IS200VSVOH1B synchronizes with TSVO and DSVO terminal boards to distribute valve‑control signals across redundant channels. Its design aligns with GE’s Speedtronic control philosophy, ensuring compatibility with legacy Mark VI systems while supporting modern Mark VIe architectures.
Environmental and Mechanical Details
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Dimensions: 2.1 × 18.8 × 26.2 cm
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Weight: 0.36 kg
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Conformal‑coated PCB for harsh‑environment durability
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Suitable for high‑vibration turbine compartments
Applications
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Gas turbine fuel‑valve control
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Steam turbine servo‑valve actuation
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TMR‑based turbine protection systems
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High‑precision hydraulic control loops
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Mark VI/Mark VIe upgrade and retrofit projects
Technical Specifications Table
| Parameter |
Specification |
| Model |
IS200VSVOH1B |
| Product Type |
VME Servo & Communication Interface Card |
| Series |
Mark VIe |
| Servo Channels |
4 electro‑hydraulic valves |
| Feedback Support |
LVDT position feedback |
| Pulse Inputs |
Flow‑rate pulse conditioning |
| Relays |
4 onboard relays |
| Connectors |
P1–P6 internal, J5 front‑panel |
| LEDs |
RUN, FAIL, STATUS |
| PCB Protection |
Conformal coating |
| Dimensions |
2.1 × 18.8 × 26.2 cm |
| Weight |
0.36 kg |
| System Compatibility |
Mark VI / Mark VIe |
| Status |
Active |
| Origin |
USA |
FAQ
Q: Does the IS200VSVOH1B support TMR operation A: Yes. It is fully compatible with TMR architectures and synchronizes with TSVO/DSVO terminal boards.
Q: What types of feedback signals does the board process A: It supports LVDT position feedback and pulse‑rate flow signals.
Q: Is the board backward‑compatible with older Mark VI systems A: Yes. It is designed to integrate with both Mark VI and Mark VIe platforms.
