IS200TSVOH1A | GE OEM Turbine TSVO Servo Module

Description

Product Introduction (Anti-Template)

If you need a board dedicated purely to driving servo valve coils—without the feedback conditioning that the TSVC handles—this is the board you’re looking for. The IS200TSVOH1A is the TSVO (Terminal Board Servo Valve Output) variant for the Mark VIe system, designed specifically for servo valve output signals in turbine governing applications. This board focuses on generating the precision analog drive signals that position turbine inlet, reheat, and extraction valves.

What differentiates the TSVO from the TSVC? The TSVC includes both servo valve drive outputs AND position feedback inputs (LVDT/RVDT conditioning). The TSVO is a dedicated output-only board—drive signals only, no feedback conditioning. This makes it ideal for applications where the feedback is handled elsewhere or where you need to drive a valve that doesn’t require separate feedback conditioning. The ‘H1A’ designation indicates the first variant with the ‘A’ revision. The ‘A’ revision brings improved output linearity and lower drift. This board is a drop-in replacement for the IS200TSVOH1, with no software changes required.

Key Technical Specifications

Compatible Replacement Models

✅ Drop-in Replacement: IS200TSVOH1 — The base revision without the ‘A’ suffix. Identical pinout, mounting, and software interface. The ‘A’ revision has improved output linearity and lower drift. No software changes required.

⚠️ Software Compatible: IS200TSVCH1A — Servo board with integrated feedback conditioning. Includes additional feedback inputs—may be used if feedback is needed. Requires software configuration. Budget 2-4 hours.

⚠️ Software Compatible: IS200TBCI1A — General-purpose analog output board. Lacks servo-specific drive capability. Requires external servo amplifiers and complete hardware/software rework. Budget 8-12 hours.

❌ Hardware Incompatible: IS200TBQGH1A — Excitation termination board. Different pinout and application. Not applicable.

Frequently Asked Questions (FAQ)

Q: What’s the difference between the TSVO and the TSVC?

A: The TSVO is an output-only board—it provides servo valve drive signals but no position feedback conditioning. The TSVC includes both drive outputs and feedback inputs (LVDT/RVDT conditioning). Use TSVO when feedback is handled by another board or system.

Q: What improvements does the ‘A’ revision have over the base TSVOH1?

A: The ‘A’ revision has improved output linearity and lower drift on the servo drive channels, resulting in more precise valve positioning.

Q: Can I replace a TSVOH1 board with a TSVOH1A without any changes?

A: Yes. The ‘A’ is a drop-in replacement. No software changes, no wiring changes, no configuration changes.

Q: What types of servo valves can the TSVO control?

A: The TSVO controls electro-hydraulic servo valves requiring analog drive signals (typically ±10V or 4-20mA). It’s used for inlet, reheat, and extraction valves in turbine governing systems.

Q: Why would I choose the TSVO over the TSVC?

A: If your feedback conditioning is handled elsewhere—for example, by a separate termination board or by an external servo amplifier—you only need the output function. The TSVO saves board space and simplifies wiring in those applications.

Q: Is the TSVO board hot-swappable?

A: We strongly advise against hot-swapping servo control boards. Power down the cabinet segment before swapping.

Q: What bench testing should I do before installing a TSVO board?

A: Standard servo output protocol. First, visual inspection. Second, verify continuity between terminal blocks and D-sub pins. Third, apply power and verify output signal ranges using a precision voltmeter. Fourth, run a 24-hour stability test at 50°C ambient.

Q: How do I verify I’m getting a genuine TSVO board?

A: Check component markings against GE documentation. Weigh the board; should be about 360 grams. Look for the GE holographic security label.

Q: Where do I find the official wiring diagram for the TSVOH1A?

A: GE document GEK-130552 covers the TSVO series. The H1 variant is detailed in the section specific to that configuration. Pay special attention to the output signal ranges and load impedance requirements. Always cross-reference against your cabinet’s as-built drawings. Verify every channel before terminating.

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