I/O modules

Key Technical Specifications

This GE IS200EDEXG1B IS200EDEXG1BBB board accepts 125V DC nominal input power. It delivers 3A excitation current for generator field regulation. The unit measures 22 cm in length, 16 cm in width, and 5 cm in height. Its total weight equals 0.95 kg without any packaging materials.

The GE IS200EDEXG1B IS200EDEXG1BBB includes eight SCR firing channels for phase control. Additionally, it features four analog feedback inputs for voltage and current sensing. A single 50-pin ribbon connector handles all control signals. The board contains 2 microcontrollers, 8 optocouplers, 12 transistors, and 20 resistors.

GE IS200EDEXG1B IS200EDEXG1BBB stores energy using two series electrolytic capacitors. Together, they provide 470 µF at 200V rating for field current support. This energy storage maintains excitation during 40 millisecond line dips. Therefore, the board prevents generator voltage collapse during transient faults.

Design and Integration

Both the GE IS200EDEXG1B and GE IS200EDEXG1BBB versions use identical firmware and hardware. These boards employ six-layer PCB construction with high-creepage isolation barriers. Consequently, the GE IS200EDEXG1B IS200EDEXG1BBB operates reliably from -15°C to +60°C ambient temperature.

For installation, you need M3 screws for the five mounting holes. The board draws 120 mA typical current from the 125V supply. During full excitation, it consumes up to 350 mA from the control power. We recommend using a 1.5A fast-acting fuse for input protection.

Practical Application

This excitation board regulates generator terminal voltage with ±0.5% accuracy. It controls field current based on reactive power demand signals. The GE IS200EDEXG1B IS200EDEXG1BBB also provides over-excitation and under-excitation protection limits. Therefore, it ensures stable generator synchronization with the utility grid.

Details