GE DS200FCRLG1A DS200FCRLG1AFC Firing Circuit Board

This GE DS200FCRLG1A DS200FCRLG1AFC Firing Circuit Control Board generates precise firing pulses for SCR bridges. The board receives synchronization signals and calculates optimal firing angles for each phase. You will find this component in many GE Mark V excitation systems. The DS200FCRLG1AFC variant includes a rugged conformal coating for harsh environments.

Technical Specifications

Parameter	Specification
Full Model	GE DS200FCRLG1A DS200FCRLG1AFC Firing Circuit Control Board
Category	Firing Circuit Control Board
Number of Channels	6 Independent Firing Circuits
Firing Angle Range	0 to 180 Degrees
Angle Resolution	0.1 Degree
Synchronization Input	3-Phase Voltage (50-600V AC)
Output Pulse Width	30 to 120 microseconds
Dimensions (H x W)	230 mm x 160 mm
Weight	Approximately 0.88 kg
Connectors	2 x 20-Pin Headers, 6 x Output Terminals
Component Count	212 Discrete Components
Energy Storage	6 x 47 µF Timing Capacitors

Firing Control and Synchronization Features

The GE DS200FCRLG1A DS200FCRLG1AFC Firing Circuit Control Board synchronizes to the AC line voltage for each phase. A phase-locked loop ensures stable firing angle control under varying conditions. The board generates complementary pulses for six-pulse bridge configurations. Furthermore, it includes a hardware interlock to prevent cross-conduction faults. Consequently, your SCR bridge receives accurate firing pulses regardless of load variations.

Installation and Connection Steps

Mount this GE DS200FCRLG1A DS200FCRLG1AFC Firing Circuit Control Board in any Mark V exciter cabinet slot. First, connect the three-phase synchronization inputs to the voltage sensing terminals. After that, attach the firing pulse outputs to the gate driver board inputs. Then, set the minimum and maximum firing angle limits using onboard potentiometers. Finally, verify all six pulses using an oscilloscope before enabling the exciter.

Energy Discharge and Safety Notice

This GE DS200FCRLG1A DS200FCRLG1AFC Firing Circuit Control Board stores minimal energy in its capacitors. However, you must wait 30 seconds after power removal before handling. The six timing capacitors discharge through internal resistors. Never disconnect synchronization wiring while the board remains powered.

Status Indication and Diagnostics

A green LED indicates the board has valid synchronization on all three phases. A yellow LED flashes during normal firing pulse generation. A red LED illuminates when the board detects a phase loss or synchronization fault. Six individual LEDs show active firing pulses for each SCR channel.