The GE IS200EXHSG3A IS200EXHSG3AEB exciter high-speed relay driver board controls field contactors for generator excitation systems. This board drives external relays and contactors with fast switching times. You will find this driver board in GE Mark VI excitation control cabinets. Its high-speed design ensures rapid field flashing and de-excitation.
Relay Driver Architecture
This driver board provides eight high-speed relay output channels. Consequently, it controls multiple contactors from a single board. The GE IS200EXHSG3A IS200EXHSG3AEB accepts 5V logic inputs from the main controller. Moreover, each output includes an LED status indicator. You can monitor contactor states directly from the board.
Technical Specifications
| Parameter | Value |
|---|---|
| Output Channels | 8, high-side driver |
| Output Voltage | 24V DC nominal |
| Output Current | 2A continuous per channel |
| Output Response Time | 1 ms maximum |
| Input Logic Level | 5V DC (TTL compatible) |
| Input Current | 5 mA per channel |
| Dimensions | 210mm x 150mm x 30mm |
| Weight | 0.55 kg (1.21 lbs) |
| PCB Layers | 6 |
| Onboard Components | 8 MOSFETs, 8 optocouplers, 8 LEDs, 8 suppression diodes |
| Connector Count | 4 (logic input, relay output, power, status) |
| Status Indicators | 8 LEDs (output active), 2 LEDs (power, fault) |
| Energy Storage | 1000 µF (output filtering) |
| Isolation Voltage | 1500V (input to output) |
| Output Protection | Overcurrent, overtemperature, short circuit |
| Operating Temperature | -10°C to +55°C |
| Storage Temperature | -25°C to +70°C |
High-Speed Switching and Protection
The unit includes MOSFET drivers for fast, reliable switching. Therefore, it achieves 1 ms response time for critical exciter functions. This board replaces the IS200EXHSG3AEB version without any logic changes. Simply remove the old board and install this one. GE designed this driver board for single-slot installation. Hence, it fits directly into existing Mark VI rack positions.
Six PCB layers separate logic traces from high-current output circuits. Four connectors handle all input, output, power, and status signals. The GE IS200EXHSG3A IS200EXHSG3AEB includes flyback diodes across each output channel. Accordingly, it protects the MOSFETs from inductive kickback. Eight LEDs show the active state of every output channel clearly.
Output Protection and Installation Guide
Each output includes overcurrent protection that limits at 3A. A thermal shutdown circuit protects the MOSFETs from overheating. The GE IS200EXHSG3A IS200EXHSG3AEB works with all GE Mark VI excitation systems. Always use suppressed coils or external diodes for relay loads. Proper heatsinking around the MOSFETs ensures full current rating.
The board requires 24V DC power for output stages and 5V for logic. Do not exceed the maximum output current of 2A per channel. The GE IS200EXHSG3A IS200EXHSG3AEB provides reliable relay driving for exciter control. Installation requires only a screwdriver for power and output connections. This board operates in non-condensing environments with adequate airflow.
Details
| Weight | 0.1 kg |
|---|---|
| Dimensions | 25 × 108 × 127 mm |
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