GE IS200VSVOH1BDC Servo Control Board, MRP643486

Technical Specifications

Model: IS200VSVOH1BDC, MRP643486

Brand: GE（GE Vernova）

Product Type: VSVO servo control board

Matching System: GE Speedtronic Mark VI turbine control system

Processor: 32‑bit high‑speed DSP processor

Servo Channels: 4 independent electro‑hydraulic servo drive channels

Output: 0‑200mA servo valve drive current, short‑circuit protection

Feedback Input: Multi‑channel LVDT / RVDT position feedback for valve position

Communication: VME64 backplane bus, RS‑232 local service port

Isolation: 1000V channel‑to‑channel isolation

Indicator: On‑board LED for run status, fault alarm

Installation: 6U single‑slot VME rack plug‑in board

Operating Temperature:‑40℃ ~ +70℃, non‑condensing

Humidity:5%‑95% non‑condensing

Protection Class:IP20

Weight:0.80kg

Dimension:340mm ×210mm ×25mm

Compatible System: Gas turbine, steam turbine, combined‑cycle generator control cabinet

Core Function

VSVO servo control board for Mark VI turbine control system. It executes high‑speed position closed‑loop PID control for turbine fuel valves and steam valves. It outputs driving current to electro‑hydraulic servo valves, collects real‑time valve position from LVDT sensors, compares position set‑point with actual feedback to adjust servo output. It supports simplex and TMR triple‑modular redundant turbine control configuration, ensures fast and accurate valve response under varying load conditions, which is critical for turbine speed and load regulation.

Product Details

The IS200VSVOH1BDC with part number MRP643486 belongs to VSVO series servo control board for GE Speedtronic Mark VI turbine control system.

This 6U VME plug‑in board is the core drive unit for turbine hydraulic actuators. The built‑in 32‑bit DSP runs high‑frequency closed‑loop algorithm, continuously calculates deviation between valve position command and LVDT feedback signal, and outputs adjustable current to drive electro‑hydraulic servo valves. Each servo channel is equipped with short‑circuit protection and channel isolation circuit to suppress field interference. It exchanges control data with main controller via VME backplane bus, and supports local parameter debugging through RS‑232 service port. LED status indicators facilitate on‑site inspection and fault diagnosis. Conformal coated circuit board improves anti‑vibration, moisture‑proof and anti‑electromagnetic‑interference performance, adapts to harsh working environment of power plant turbine cabinet. Widely deployed in simplex and TMR triple‑modular redundant gas‑steam turbine control cabinets.

It belongs to critical servo drive spare‑part for Mark VI turbine control system, widely used in overhaul and renovation projects of power generation units.

It is important spare hardware for servo control loop debugging and defective IS200VSVOH1BDC board replacement.