1. Basic Information

• Model: DS200LDCCH1ANA (Functional Acronym: LDCC)

• Brand/Series: General Electric (GE) Speedtronic Mark V Gas/Steam Turbine Control System, DS200 Series Drive Control & LAN Communication Board

• Standard: Designed per manual GEI-100216, compatible with GE Directo‑MATIC 2000 series exciters and drives

• Core Role: Core control board for Mark V system, responsible for drive control, motor coordination, LAN communication, I/O conversion, system diagnosis and parameter configuration

2. Core Hardware & Specifications

• Processor Architecture: Onboard 4 dedicated microprocessors with separate functions:

  • LCP (LAN Control Processor): Manages network communication, bus control and data exchange

  • DCP (Drive Control Processor): Executes drive logic, A/D & D/A conversion, I/O control and DMA operations

  • MCP (Motor Control Processor): Performs motor start/stop, speed regulation and protection logic

  • CMP (Co‑Motor Processor): Handles multi‑motor synchronization and coordinated control

• Power & Electrical: 24VDC input (supplied by ADMA module), typical power 15W, max 25W; PCB with conformal coating for anti‑EMI and anti‑vibration performance

• HMI & Configuration: 16‑character alphanumeric display and keypad (KPPL) for on‑site programming/diagnosis; 6 Flash PROMs (U7‑U21) for configuration storage, field‑reprogrammable; dedicated connectors for high‑noise environments

• Environment & Physical: Operating temperature -40°C to +85°C; dimensions approx. 263×58×28mm, weight approx. 0.43kg; standard embedded mounting for Mark V system racks

3. Core Functions

• Drive & Motor Control: Executes exciter/drive control algorithms, processes analog/digital I/O, supports encoder and VCO inputs for precise speed regulation and protection

• LAN Communication Management: Acts as system communication node, manages internal bus and data exchange with host/externals, ensuring real‑time and reliable transmission

• On‑Site Diagnosis & Debugging: Local keypad/display for status monitoring, fault code reading and parameter tuning; supports soft reset (without power interruption) for fast fault clearing and recovery

• Redundancy Compatibility: Compliant with Mark V high‑reliability redundant architecture, suitable for continuous operation in critical power plant control scenarios

4. Typical Applications

• Drive and excitation control for gas turbines, steam turbines and combined‑cycle power plants

• Spare replacement and upgrade for Mark V control systems

• Motor/drive control and communication units in industrial power units and chemical process control