Technical Specifications and Board Design
This drive control board manages power conversion for GE Mark V turbine systems. The GE DS200SDCCG1A DS200SDCCG1AFD generates firing pulses for silicon-controlled rectifiers. You can install this board into any standard Mark V rack slot position. Its high-speed processing ensures precise control of DC motor fields. The board weighs approximately 0.66 kilograms. Its dimensions measure 28 cm in height, 18 cm in width, and 2.5 cm in depth.
| Parameter | Specification |
|---|---|
| Brand | GE Energy / General Electric |
| Model | DS200SDCCG1A DS200SDCCG1AFD |
| Category | Drive Control Board / SCR Firing Card |
| Weight | 0.66 kg |
| Height | 28 cm |
| Length | 18 cm |
| Thickness | 2.5 cm |
| Number of Firing Channels | 6 independent SCR firing outputs |
| Firing Pulse Width | 30 to 120 microseconds (programmable) |
| Firing Frequency | 50/60 Hz (synchronized to line) |
| Analog Inputs | 4 channels (0-10V DC or 4-20 mA) |
| Analog Outputs | 2 channels (0-10V DC or 4-20 mA) |
| Discrete Inputs | 8 channels (24V DC) |
| Discrete Outputs | 6 channels (24V DC, 0.25A) |
| Phase Lock Loop | Hardware-based synchronization |
| Isolation Voltage | 2500V DC between firing and logic |
| Energy Storage | Local decoupling capacitors (no battery) |
| Component Count | Single PCB with DSP, gate drivers, optocouplers, and ADCs |
SCR Firing Control and Pulse Generation
The board generates precisely timed pulses for six SCR gates. Each pulse maintains constant energy regardless of line voltage variations. The GE DS200SDCCG1A DS200SDCCG1AFD uses a hardware phase-locked loop for synchronization. This loop locks to the AC line frequency within one cycle. The board adjusts firing angles from 0 to 180 degrees continuously. It monitors the DC bus voltage and current for closed-loop regulation. A front-panel LED indicates proper phase synchronization with the AC line.
Feedback Processing and Protection Features
The board monitors armature voltage and current for overcurrent protection. It detects SCR shorts and open gates immediately upon occurrence. The GE DS200SDCCG1A DS200SDCCG1AFD initiates a firing inhibit within 100 microseconds of a fault. It reports all diagnostic codes back to the main turbine controller. The board includes a watchdog timer for processor monitoring. This timer resets the board if the software stops responding. A red LED illuminates when any fault condition triggers the protection circuit.
Installation and Operational Guidelines
You must insert this board into a dedicated slot near the power interface card. The backplane supplies 5V, +15V, and -15V DC power automatically. The GE DS200SDCCG1A DS200SDCCG1AFD draws approximately 350 mA from the 5V supply. It draws an additional 100 mA from each of the ±15V rails. You must use shielded cables for all analog feedback connections. This practice prevents noise from corrupting current and voltage readings. The board requires no external battery for normal operation. You should verify heatsink contact before applying power to the drive.
Details
| Weight | 0.45 kg |
|---|---|
| Dimensions | 170 × 145 × 65 mm |
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