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GE DS200SDCCG4A

Product Name: GE Mark V Speedtronic SDCC Main Processor Drive Control Board
Product Introduction: The DS200SDCCG4A is the primary drive control board (SDCC) for GE’s Speedtronic Mark V system. It acts as the “brain” of the drive cabinet, executing complex control algorithms, managing real-time VME bus communication, and coordinating data between peripheral I/O modules for gas and steam turbine drive applications.
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Detailed content

Technical Specifications:
  • Manufacturer: General Electric (GE Vernova)
  • Model: DS200SDCCG4A
  • Platform: Speedtronic Mark V
  • Type: Drive Control Board (SDCC)
  • Processor: Triple 16-bit microprocessors (DCP + MCP + optional DSP) with dual-port RAM
  • Memory: Integrated SRAM (data) and EPROM (firmware)
  • I/O: High-speed digital I/O, ±10 V / 4-20 mA analog I/O, digital timers
  • Isolation: 1500 V between field and logic side
  • Connectors: 5 × front-panel headers (J1-J5) for I/O, gate-drive, and status
  • Power Supply: 28 V DC nominal (single board: +5 V @ 2 A typical, ±15 V for analog front-end)
  • Architecture: Supports Triple Modular Redundancy (TMR)
  • Operating Temperature: 0 °C to +60 °C (alternate source: -30 °C to +65 °C)
  • Storage Temperature: -40 °C to +85 °C
  • Weight: approx. 1 lb (0.45 kg) (shipping weight 3.0 kg with protective packaging)
  • Cooling: Convection (no fan required)
  • Certifications: CE, UL, RoHS, marine-environment conformal coating, Zone 2 hazardous location certified
    Functional Characteristics:
  • Triple CPU with dual-port RAM: concurrent execution keeps scan times below 1 ms under heavy load
  • On-board microprocessor performs dedicated drive calculations locally, minimizing system latency
  • Non-volatile SRAM + EPROM retains critical drive parameters and firmware during total power loss
  • Advanced VME bus coordination synchronizes communication between master controller and auxiliary I/O cards
  • Integrated diagnostics allow self-monitoring for hardware faults; technicians access real-time error logs via Mark V HMI
  • TVS-protected inputs survive breaker-slam events in medium-voltage drive cubicles
  • 1500 V isolation allows 480 V contactor coils and 24 V sensors on the same card without ground-shift damage
    Working Principle: The board receives set-points from the triple-redundant Mark V CPU, closes current and position loops locally, and returns actual position plus diagnostics over the VME backplane. The three processors share dual-port RAM for concurrent servo loop, I/O, and math function execution.
    Application Scenarios:
  • Gas turbine and compressor variable-frequency drives
  • Medium-voltage drive cubicles
  • Turbine skids, offshore compressors, pipeline booster stations
  • Mission-critical power generation environments
    Usage Notes:
  • Board contains factory-standard EPROM; drive-specific parameters and site-specific configuration files must be downloaded via Mark V Toolbox or similar GE configuration software during commissioning
  • Convection-cooled design requires no fan up to 65 °C and is certified for Class I Div. 2 and offshore environments
  • Drop-in spare sharing DS200 form factor with earlier SDCC revisions

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