Description

GE DS200EXDEG1A De-Excitation Control Board

The GE DS200EXDEG1A, also cataloged as the DS200EXDEG1A De-Excitation Control Board, operates as a dedicated hardware component for generator field energy removal and SCR firing control within the GE Speedtronic Mark V / EX200 excitation control system.

Hardware Specifications

Parameter	Specification
Model	DS200EXDEG1A
Brand	GE General Electric
Weight	2.00 lbs
Operating Temp	0 deg C to 65 deg C
Power Consumption	240 VDC board supply
Functional Acronym	EXDE
Product Type	De-Excitation Control Board
Series	EX200 / Speedtronic Mark V
Control Signal Voltage	24 VDC firing control
Exciter Connector Type	34
Terminal Block	12
PCB Coating	Standard industrial conformal coating
Functional Revision	Revision A

GE Speedtronic Excitation Control Integration

The DS200EXDEG1A provides de-excitation command processing within the GE EX200 excitation architecture. The board controls thyristor/SCR gate firing logic during generator field discharge sequences. When field breakers or contactors open, the board manages the removal of stored excitation energy and limits field voltage rise to reduce stress on connected power circuit components.

The module interfaces with the excitation control system through dedicated connectors and terminal interfaces, maintaining the required electrical path between control logic and excitation power components.

Frequently Asked Questions

Q: What is the primary function of the DS200EXDEG1A board?
A: The DS200EXDEG1A is a De-Excitation Control Board used to control SCR firing logic and manage generator field energy removal during shutdown conditions.

Q: Does the DS200EXDEG1A operate as a standalone controller?
A: No. The board functions as a dedicated control component within the GE Speedtronic Mark V / EX200 excitation system and requires system-level control signals.

Q: What power supply is specified for this board?
A: The available technical data specifies a 240 VDC power supply for the DS200EXDEG1A board.

Field Installation Guidelines

• Verify the board part number and revision level before installation into the excitation control rack.
• Confirm that all excitation power sources are isolated before removing or installing the module.
• Maintain proper connector alignment when mating the 34-pin exciter connector and terminal interfaces.
• Use appropriate grounding practices for the rack assembly and maintain PCB protection against contamination.
• Route control wiring separately from high-current excitation conductors to reduce electrical interference.
• Inspect terminal connections and board seating condition during commissioning activities.

Specifications

• Brand: General Electric

Advantages

• High reliability in industrial environments
• Supports continuous operation
• Compatible with major PLC/DCS systems