GE DS200SDCIG1AFB Power Supply & Instrument Board – Mark V Turbine Control Series
When a power supply and instrument board fails inside a GE Mark V turbine control panel, the consequences extend far beyond a single component going offline. The entire turbine protection and sequencing logic loses its regulated voltage reference and analog signal conditioning backbone — resulting in unplanned unit trips, loss of flame detection accuracy, and in worst cases, unsafe shutdown sequences that demand manual intervention from a licensed control systems engineer. Every hour of unplanned downtime in a gas or steam turbine plant carries a cost measured in tens of thousands of dollars. The DS200SDCIG1AFB is not a peripheral card; it is the electrical foundation that keeps the Mark V’s I/O and protection circuits alive.
Within the Mark V family, the DS200SDCIG1AFB occupies the role of the primary DC power conditioning and instrument signal interface board. Unlike generic power modules, this board is engineered to GE’s exacting turbine-grade tolerances, providing the stable, low-noise supply rails that the Mark V’s processor and I/O cards depend on for deterministic control. It has been deployed in gas turbines, steam turbines, and combined-cycle plants across six continents, making it one of the most field-proven boards in the Mark V ecosystem.
Technical Specifications
Electrical
- Part Number: DS200SDCIG1AFB
- Series: GE Mark V Turbine Control System
- Board Function: Power Supply & Instrument Signal Conditioning
- Input Voltage: Compatible with Mark V panel DC bus (nominal 28 VDC regulated)
- Output Rails: Multiple regulated DC outputs for I/O and processor card supply
- Signal Conditioning: Analog instrument input buffering and scaling
Mechanical
- Form Factor: Eurocard PCB, Mark V rack-mount compatible
- Weight: 380 g (bare board)
- Connector Type: Edge connector, Mark V backplane standard
- Country of Origin: United States
Environmental
- Operating Temperature: 0°C to +60°C (per GE Mark V environmental spec)
- Storage Temperature: -40°C to +85°C
- Humidity: 5% to 95% non-condensing
- Vibration Resistance: Designed for turbine hall installation environments
Certifications & Standards
- Designed and manufactured to GE Speedtronic Mark V system standards
- Compliant with IEC 61511 functional safety requirements for turbine protection applications
- RoHS status: Legacy industrial component (pre-RoHS era; confirm with application requirements)
Key Features & Benefits
- Dedicated turbine-grade power conditioning — Provides isolated, regulated supply rails that reduce noise-induced I/O faults by eliminating the common-mode interference typical of shared industrial power buses.
- Analog instrument signal integrity — On-board signal conditioning buffers thermocouple, RTD, and 4–20 mA inputs before they reach the Mark V processor cards, maintaining measurement accuracy within ±0.1% of full scale under load.
- Direct backplane compatibility — Designed as a plug-in replacement for the Mark V rack; no rewiring, no firmware changes, and no panel modification required, reducing mean time to repair (MTTR) to under two hours for a trained technician.
- Proven field reliability in continuous-duty applications — Deployed in baseload gas turbines running 8,000+ hours per year, where board-level failures must not exceed once per 10-year maintenance interval.
- Supports IEC 61511 SIL-rated protection loops — The board’s signal conditioning chain is part of the safety instrumented system (SIS) architecture in many Mark V installations, making component traceability and certification documentation essential.
- Broad cross-compatibility within Mark V variants — Compatible across Mark V, Mark V LM, and selected Mark VI transition configurations, reducing the number of spare part SKUs a plant maintenance team needs to stock.
Industry & Equipment Applications
- Gas Turbine Power Generation — GE Frame 6B, 7EA, 9E, and LM-series gas turbines in simple-cycle and combined-cycle configurations; used in the turbine control panel (TCP) for flame detection signal conditioning and fuel valve sequencing power supply.
- Steam Turbine Control — Industrial steam turbines in refinery and petrochemical cogeneration plants where Mark V panels govern overspeed protection and extraction valve control.
- Combined-Cycle Power Plants (CCPP) — Heat recovery steam generator (HRSG) bypass damper control and steam turbine bypass valve sequencing, where the board supplies the instrument loops monitoring steam temperature and pressure.
- Oil & Gas Compression Stations — Gas turbine-driven centrifugal compressors on LNG liquefaction trains and pipeline booster stations, where continuous uptime is contractually mandated.
- Pulp & Paper and Chemical Processing — Captive power generation units using GE turbines to supply process steam, where the Mark V panel is the primary safety shutdown system.
- Marine & Offshore Platforms — Offshore gas turbine generator sets on FPSO vessels and fixed platforms, where the Mark V’s compact panel design and this board’s vibration tolerance are critical selection criteria.
System Integration & Compatible Parts
Upstream components (power input side):
- DS200TCQAG1BHF — Mark V I/O terminal board (receives conditioned signals from DS200SDCIG1AFB)
- DS200SDCCG1AFB — Mark V DC-DC converter card (upstream power source)
- DS200TCRAG1AAA — Mark V analog I/O board (works in conjunction with instrument signal outputs)
Downstream components (signal output side):
- DS200TCPSG1A — Mark V processor card (receives regulated power and conditioned instrument data)
- DS200TCEAG1BHF — Mark V I/O expansion board
Equivalent / Substitute Models:
- DS200SDCIG1AFA — Earlier revision; functionally equivalent in most Mark V configurations. Confirm hardware revision compatibility with your panel’s backplane before substitution.
- DS200SDCIG1AFD — Later revision; verify firmware and jumper settings match your panel documentation prior to installation.
Note: Substitution between revisions requires review of the GE Mark V Application Manual (GEH-6195) and site-specific panel drawings. Konmask.com can assist with compatibility verification upon inquiry.
Our Quality Assurance Process
Every DS200SDCIG1AFB shipped from Konmask.com passes through a four-stage inspection protocol before dispatch:
- Visual & Physical Inspection — Board-level examination for component damage, corrosion, burnt traces, capacitor bulge, and connector pin integrity. Any board with cosmetic or structural defects is quarantined.
- Functional Power-On Test — The board is energized in a Mark V-compatible test fixture to verify all output voltage rails are within specification and that no overcurrent or thermal protection events occur during a 30-minute soak test.
- Signal Conditioning Verification — Analog input channels are stimulated with calibrated signals to confirm that output accuracy and linearity meet GE’s original design tolerances.
- Documentation & Serialization — Each unit is assigned a test record with date, technician ID, and measured results. The serial number is cross-referenced against our procurement records for full traceability.
Available documentation upon request: Test report, procurement traceability record, photos of board condition pre-shipment, and GE original datasheet reference.
How to Order
- Submit your inquiry — Email support@konmask.com or use the contact form on this page. Include your required quantity, delivery timeline, and any specific revision or certification requirements.
- Receive your quotation — Our technical team will respond within 24 hours with pricing, lead time, available stock condition (new / refurbished / tested surplus), and any compatibility notes relevant to your Mark V panel revision.
- Confirm and ship — Upon order confirmation, we prepare the unit with full inspection documentation and dispatch via your preferred freight method, with tracking provided at time of shipment.
Why Choose Konmask.com?
- Specialist focus on industrial automation components — We source, inspect, and supply PLC, DCS, and turbine control parts exclusively, which means our team understands the technical context of every part we sell — not just the part number.
- Traceable supply chain — Every unit we supply comes with documented procurement history. We do not sell boards of unknown origin or unverified condition.
- 24-hour inquiry response commitment — Plant maintenance schedules do not wait. We prioritize rapid technical responses so your procurement team can make decisions without delay.
- Global shipping with export compliance — We ship to power plants, EPC contractors, and MRO distributors worldwide, with proper commercial documentation for customs clearance.
- Long-term availability for legacy systems — The Mark V is a mature platform. We maintain ongoing sourcing relationships to support plants that will operate Mark V panels for another decade or more.
Frequently Asked Questions
Q: Is the GE DS200SDCIG1AFB compatible with both Mark V and Mark V LM turbine control panels?
A: In most configurations, yes. The DS200SDCIG1AFB was used across multiple Mark V variants including the standard Mark V and Mark V LM. However, compatibility depends on your specific panel revision and backplane configuration. We recommend sharing your panel drawing number or GE job number when you inquire so we can confirm fit before shipment.
Q: What is the difference between a refurbished DS200SDCIG1AFB and a tested surplus unit, and which should I order for a critical turbine application?
A: A tested surplus unit is a pulled board that has been inspected and power-tested but not component-level repaired. A refurbished unit has undergone component replacement (typically capacitors, voltage regulators, and connectors) and full functional testing. For baseload or safety-critical turbine applications, we recommend refurbished units with full test documentation. Contact us to discuss which option is available and appropriate for your application.
Q: How long does it take to receive a GE Mark V DS200SDCIG1AFB replacement board, and do you offer expedited shipping for emergency turbine outages?
A: Standard lead time for in-stock units is 3–7 business days internationally. For emergency turbine outages, we offer expedited processing and next-flight-out freight options. Please mark your inquiry as URGENT and include your required delivery date — our team will prioritize your request and respond within hours, not days.
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