GE DS200FCGDH1B FCGD Gate Distribution & Status Control Board for Mark V LCI Converter System

GE DS200FCGDH1B, abbreviated as FCGD (Gate Distribution and Status Card), is a dedicated VME-format interface circuit board designed exclusively for GE Speedtronic Mark 

V turbine control system and LCI (Load Commutated Inverter) variable frequency drive unitCambia Aut.... It serves as the signal transfer hub between DSPC main processor board and SCR 

thyristor power bridge circuit.

This board decodes firing angle and trigger commands transmitted from DSPC via VME backplane, distributes precise gate trigger signals to each arm of six-pulse phase-controlled 

non-reversing rectifier/inverter bridge, realizing accurate thyristor turn-on timing control. Meanwhile, it collects multiplexed bridge voltage, current, frequency and device fault feedback 

signals, processes status data and sends diagnostic information back to DSPC for closed-loop regulation and fault judgment. Equipped with fiber-optic signal receiving channels for FPGA 

board status feedback, it effectively isolates strong electromagnetic interference inside power cabinets, preventing trigger misfire and bridge commutation failure. It is an indispensable 

core maintenance spare part for overhaul, fault replacement and routine spare inventory of gas/steam turbine LCI starting systems in power plants and petrochemical enterprises.

Technical Specifications

Part Number: DS200FCGDH1B

Manufacturer: General Electric (GE), Origin: USA

Functional Definition: FCGD Gate Distribution & Status Board, LCI Control & Gating Assembly

Compatible System: GE Speedtronic Mark V Turbine Control System, LCI Synchronous Motor Starting Converter

Bus Interface: Standard VME backplane communication interface

Trigger Mode: Multi-channel SCR gate signal distribution for six-pulse non-reversing bridge

Signal Interface: Fiber-optic receiving ports for FPGA board status feedback, analog feedback signal conditioning circuit

Diagnostic Indicator: Front panel IMOK LED and multi-channel status indication lamps for running & fault alarm

PCB Treatment: Conformal coated circuit board for anti-corrosion, anti-vibration and anti-moisture

Power Supply: Rack internal DC power supply via VME backplane

Installation Form Factor: Single-slot VME plug-in card structure

Operating Temperature: -20℃ ~ +60℃

Humidity: 5%–95% Non-Condensing

Protection Class: IP20 (Cabinet internal installation)

Net Weight: Approx. 0.14kg

Certification: CE, Industrial power control standard compliance

Key Features

Professional six-pulse bridge trigger signal distribution design, ensuring consistent phase angle synchronization for thyristor commutation and stable LCI converter operation.

Bidirectional signal transmission function: decode upper control commands and upload power bridge operating status & fault alarms to main processor.

Fiber-optic isolated signal input design, greatly resisting high-frequency electromagnetic interference from high-power thyristor cabinet to avoid false triggering.

Built-in complete signal conditioning and fault detection circuit, timely capture bridge overcurrent, commutation failure and device abnormal states for system interlock protection.

Front-panel intuitive LED diagnosis indicators, enabling field technicians to quickly locate trigger channel faults, communication interruption and module abnormal issues.

Standard VME plug-and-play structure, direct replacement without cabinet wiring modification, effectively shortening unit maintenance outage duration.

Conformal coated rugged PCB design, shock and vibration resistant, adapting long-term continuous operation in harsh turbine hall control cabinet environment.

Perfect hardware matching with original Mark V LCI system, fully compatible with DSPC processor and FPGA peripheral boards for system renovation and spare replacement.