GE IS200EDEXG1BBB Exciter De-Excitation Control Board
Configured for controlled de-excitation in EX2100e generator excitation systems, the GE IS200EDEXG1BBB (IS200EDEXG1B de-excitation board) provides direct physical/electrical execution. It manages SCR-based energy dissipation and conduction feedback during emergency field shutdown events.
Hardware Specifications
Parameter
Specification
Model
IS200EDEXG1BBB
Brand
GE
Origin
USA
Temperature Operating
-30 to 65 deg C
Power Consumption
Not specified
Series
EX2100e
Product Type
Exciter De-Excitation Control Board
Input Filter
Hardware filter, 4 ms
Excitation Voltage
Nominal 24 V dc
Core Performance
SCR firing, conduction sensing, voltage retention for de-excitation
Backplane Communication and I/O Density Behavior
GE EX2100e modules maintain deterministic backplane communication velocity to ensure synchronous de-excitation sequencing when multiple EDEX boards operate in follower configurations. The IS200EDEXG1BBB supports stable I/O density scaling across EX2100e racks, preventing timing skew between EMIO, EXTB, and EDEX firing paths. Firmware flash compatibility across EX2100e modules ensures consistent SCR biasing and conduction-sense interpretation during coordinated shutdown events.
Frequently Asked Questions
Q: Can the IS200EDEXG1BBB be removed while the EX2100e panel is energized? A: Removal under power is not recommended. De-energize the panel to avoid transient SCR gate activation or conduction-sense faults.
Q: Does the board impose additional backplane current load? A: It draws standard excitation-control power. No abnormal loading occurs beyond typical EX2100e de-excitation modules.
Q: How does the board behave in follower configurations using EPL2 cabling? A: The board supports coordinated firing and conduction feedback through the 25-pin EPL2 link. Timing alignment is determined by the EXTB and EMIO modules.
Field Installation Guidelines
Verify all connectors (J1, J2, J8, E1A–E12) are fully seated before energizing the excitation system.
Route SCR gate wiring away from high-voltage conduits to reduce induced noise.
Maintain proper torque on stab connectors to ensure stable break-over diode and resistor configuration.
Confirm correct jumper placement for SCR voltage and current-limiting selection.
Inspect conduction ring alignment to ensure accurate Hall-effect sensing.
Validate 24 V dc retention behavior before commissioning emergency shutdown logic.
