General Electric IS200VSVOH1BDC / IS200VSVOH1B — VME Servo Output Card | Mark VI Turbine Control Platform
Engineering Background
The IS200VSVOH1BDC (also referenced as IS200VSVOH1B) is a VME-bus servo output card engineered by GE Energy for deployment within the Mark VI Turbine Control System — GE’s flagship distributed control architecture for gas turbines, steam turbines, and combined-cycle power generation units. The Mark VI platform succeeded the Mark V and introduced triple-redundant I/O with deterministic real-time control, making servo output accuracy mission-critical for valve positioning and actuator feedback loops.
Product Positioning
This card occupies the servo output slot within the Mark VI VME chassis, translating digital control commands from the VCMI/VCRC processor boards into precision analog current signals (typically 4–20 mA or ±10 V) that drive electrohydraulic servo valves (EHSVs) and linear variable differential transformers (LVDTs). It is a direct replacement and upgrade path for aging IS200VSVO variants in field-installed Mark VI panels.
Complete Technical Specifications
| Part Number | IS200VSVOH1BDC / IS200VSVOH1B |
| Manufacturer | General Electric (GE Energy / GE Vernova) |
| Series / Platform | Mark VI Turbine Control System |
| Card Type | VME Servo Output Card |
| Bus Interface | VMEbus (IEEE 1014) |
| Output Channels | 4 independent servo output channels |
| Output Signal Type | Analog current: 4–20 mA / ±10 V differential |
| LVDT Excitation | On-board LVDT excitation and demodulation |
| Redundancy Support | TMR (Triple Modular Redundancy) compatible |
| Operating Voltage | +5 VDC, ±12 VDC (via VME backplane) |
| Operating Temperature | 0°C to +60°C |
| Storage Temperature | -40°C to +85°C |
| Humidity | 5%–95% RH, non-condensing |
| Form Factor | 6U VME single-slot board |
| Weight | 320 g (approx.) |
| Compliance | CE, RoHS (per GE Mark VI documentation) |
| Firmware | Compatible with Mark VI Toolbox (ToolboxST) |
Proven Application Environments
- Gas Turbine Control — Servo valve positioning for fuel control, inlet guide vanes (IGVs), and bleed valves on GE Frame 6, Frame 7, and Frame 9 turbines
- Steam Turbine Control — Electrohydraulic governor valve actuation and extraction valve control in steam path regulation
- Combined-Cycle Power Plants — Coordinated servo output across HRSG bypass dampers and steam admission valves
- Compressor Stations — Anti-surge valve and recycle valve servo control in pipeline compression applications
- Industrial Process Control — High-precision actuator positioning in refinery and petrochemical process loops requiring Mark VI integration
Engineering Advantages
- On-board LVDT Signal Conditioning — Eliminates external signal conditioners; excitation and demodulation are handled directly on the card, reducing wiring complexity and failure points
- TMR Architecture Compatibility — Designed for triple-redundant voting configurations; supports hot-standby operation with bumpless transfer between redundant channels
- High-Resolution DAC Output — 16-bit digital-to-analog conversion ensures sub-milliamp positioning accuracy for tight servo loop control
- Diagnostic Self-Test — Integrated hardware diagnostics report card health to the Mark VI VCMI processor via VMEbus, enabling predictive maintenance alerts
- Direct Drop-In Replacement — Pin-compatible with IS200VSVO series; no chassis modification required for field swap-out
- Long-Term Availability — Konmask.com maintains verified surplus stock to support plants operating beyond OEM active production lifecycle
System Architecture & Signal Flow
Within the Mark VI VME chassis, the IS200VSVOH1BDC receives setpoint commands from the VCMI (VME Communication and Management Interface) board over the VMEbus backplane. The card’s onboard DSP converts these digital setpoints into calibrated analog current outputs, which are routed via the terminal board (TSVOH or equivalent) to the EHSV coil drivers. Simultaneously, LVDT feedback signals from the actuator are conditioned on-board and returned to the processor for closed-loop position verification. In TMR configurations, three IS200VSVOH1B cards operate in parallel; the VCRC (VME Controller Redundancy Card) performs majority voting to detect and isolate any single-card fault without process interruption.
Sourcing & Quality Verification
- Source: Decommissioned power generation facilities and authorized surplus channels — not gray-market or counterfeit
- Inspection: Visual inspection for PCB damage, component integrity, and connector condition prior to listing
- Functional Test: Bench-tested on Mark VI-compatible VME test fixtures where applicable; test records available on request
- Firmware Revision: Revision level documented and disclosed prior to shipment; ToolboxST compatibility confirmed
- Packaging: Anti-static ESD bag + foam-lined carton; humidity indicator card included for international shipments
- Warranty: 12-month warranty against defects in materials and workmanship from date of shipment
Procurement Process
- Step 1 — Inquiry: Submit your part number, required quantity, and target delivery date via email or WhatsApp
- Step 2 — Quote: Receive a formal quotation with unit price, lead time, and shipping options within 24 hours
- Step 3 — Order Confirmation: Issue a purchase order or pay via T/T bank transfer, PayPal, or credit card
- Step 4 — Shipment: Parts dispatched within 1–3 business days; DHL / FedEx / UPS tracking provided
- Step 5 — After-Sales: Technical support and warranty claims handled directly by Konmask engineering team
📧 support@konmask.com | 📱 +0086 19859288691 (WhatsApp / WeChat)
Technical FAQ
Q: Is IS200VSVOH1BDC the same as IS200VSVOH1B?
A: Yes. The suffix “DC” denotes a specific hardware revision or date code applied during GE’s manufacturing process. Both part numbers refer to the same functional card and are electrically and mechanically interchangeable in Mark VI applications.
Q: Can this card be used in a Mark VIe system?
A: The IS200VSVOH1B is designed for the VMEbus-based Mark VI architecture. Mark VIe uses a different I/O platform (IONet-based). Direct substitution is not supported; consult your GE system integrator for Mark VIe servo output options.
Q: What terminal board is required?
A: This card interfaces with the TSVOH terminal board (or equivalent VSVO-series terminal board) mounted in the Mark VI I/O panel. Confirm your existing terminal board revision with Konmask before ordering.
Q: Do you provide ToolboxST configuration support?
A: Yes. Our engineering team can assist with card configuration parameters, I/O block assignments, and LVDT calibration procedures via remote support session.
Q: What is the lead time for bulk orders (>5 units)?
A: Lead time for bulk quantities is typically 5–10 business days depending on current stock levels. Contact us for volume pricing and availability confirmation.
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Contact: support@konmask.com | +0086 19859288691
