I/O modules

Key Technical Specifications

This GE IS200EBRGH2A IS200EBRGH2AEB board handles 600V AC maximum input voltage. It carries 25A continuous current for exciter field bridge applications. The unit measures 28 cm in length, 20 cm in width, and 7 cm in height. Its total weight reaches 1.4 kg without any packaging materials.

The GE IS200EBRGH2A IS200EBRGH2AEB includes six SCR power devices in a full-bridge configuration. Additionally, it features one fiber optic input port for firing pulse isolation. A single 10-pin terminal block connects the AC input and DC output. The board contains 6 SCR modules, 3 snubber circuits, 12 diodes, and 8 resistors.

GE IS200EBRGH2A IS200EBRGH2AEB stores energy using three series electrolytic capacitors. Together, they provide 470 µF at 900V rating for DC link smoothing. This energy storage supports bridge output during 20 millisecond commutation notches. Therefore, the board delivers clean DC excitation current to the generator field.

Design and Integration

Both the GE IS200EBRGH2A and GE IS200EBRGH2AEB versions share identical power topology. These boards employ two-layer PCB construction with heavy 4 oz copper for high current paths. Consequently, the GE IS200EBRGH2A IS200EBRGH2AEB operates reliably from 0°C to +50°C with forced air cooling.

For installation, you need M5 screws for the six mounting holes. The board draws 100 mA typical control power from an external 24V DC supply. During full load, each SCR dissipates approximately 15 watts of heat. We recommend using a 30A fast-acting fuse and a heatsink with thermal compound.

Practical Application

This interface bridge converts AC power to controlled DC excitation for synchronous generators. It receives firing pulses via the fiber optic link from the regulator board. The GE IS200EBRGH2A IS200EBRGH2AEB also provides voltage feedback signals for closed-loop control. Therefore, it forms the power stage of a modern digital excitation system.

Details