1. Basic Information

• Brand/Manufacturer: General Electric (GE)

• Model: DS200SDCCG5AHD

• Series: GE Speedtronic Mark V Gas/Steam Turbine Control System (G5 Revision), SDCC Drive Control Board Series

• Product Type: Drive Control Board, Exciter/Servo Control Core Board

• Revision Note: G5A revised version; no G2 revision produced; superseded by DS215SDCC, not backward compatible

• Manual Number: GEI-100029C

• Country of Origin: United States

2. Core Functions

1. Drive/Exciter Main Control Processing: Integrates 3 dedicated microprocessors (drive control processor, motor control processor, co-motor processor) for parallel servo drive, excitation control and motor synchronization calculation, achieving high-precision closed-loop control.

2. Configuration & Firmware Storage: Equipped with 5 EPROM connectors – 4 for factory preset parameters and 1 for user/field commissioning configuration, storing control algorithms, protection logic and range settings to ensure fast system recovery.

3. Signal Interaction & Interface Expansion: Connects daughterboards/auxiliary cards via vertical pin connectors and standoffs to extend network communication, signal acquisition and I/O expansion; exchanges data with TCQA, STCA, I/O terminal boards and other core boards in the Mark V system.

4. Hardware Configuration & Diagnostics: On-board reset button, DIP switches and jumpers for hardware function setup, channel enable and fault reset; supports system diagnostics, overspeed protection, NOx detection and emergency shutdown logic execution.

5. Redundancy & Safety Control: Adapts to Mark V triple-redundant (R/S/T) architecture, performing speed control, load regulation, excitation control, overspeed protection and vibration monitoring for gas/steam turbines.

3. Hardware Specifications

• Core Processors: 3 dedicated microprocessors with shared RAM, assigned separate drive/exciter/motor control tasks.

• Memory Configuration: 5 EPROM slots (4 factory, 1 user) for firmware and parameter storage.

• Interface Configuration: Vertical pin connectors, daughterboard mounting standoffs, multi-group signal interfaces; supports auxiliary card expansion (network, I/O, signal conditioning).

• Operating Components: Reset button, DIP switches, hardware jumpers (factory-set, not to be altered).

• Mounting: Corner-drilled for rack mounting, compatible with Mark V standard control cabinets.

• Operating Environment: Industrial wide-temperature range 0°C–65°C, fanless cooling, suitable for enclosed power plant cabinet operation.

• Replacement Model: DS215SDCC (incompatible due to hardware/firmware differences).

4. Product Features

• Tri-Core Parallel Processing: Multi-processor architecture improves control response speed and calculation accuracy for fast turbine regulation.

• High-Reliability Redundancy Compatibility: Designed specifically for Mark V triple-redundant control systems to ensure continuous and safe power equipment control.

• Modular Expansion: Supports daughterboard/auxiliary card expansion to flexibly adapt to different turbines, excitation systems and servo actuators.

• Secure Parameter Storage: EPROM-stored configurations retain data during power loss, reducing commissioning and fault recovery time.

• Industrial Durability: Three-proof coating, wide-temperature design and anti-electromagnetic interference, suitable for harsh conditions in power plants, oil & gas and heavy industry.

5. Typical Applications

• GE Mark V control systems for heavy-duty gas turbines (7F/9F class) and aeroderivative gas turbines (LM2500)

• Steam turbine, combined-cycle power plant and generator excitation (EX2000) control systems

• Servo drive and speed control for industrial turbines, compressors and pumps

• Safety control and protection systems for oil & gas, marine power and power plant DCS