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The IS200EHFCH2A IS200EHFCH2ACB functions as an exciter firing control board for turbines. This printed circuit board belongs to the Mark VI Speedtronic series from General Electric. The IS200EHFCH2A serves as the standard version for firing control signals. Its variant, the IS200EHFCH2ACB, includes a conformal coating for extra circuit protection. Both boards manage exciter firing control for steam and gas turbine generators.
Core Technical Specifications
This board provides multiple firing pulse channels for thyristor control. You will also find feedback inputs for firing verification. The board stores minimal energy but uses capacitors for pulse shaping. Meanwhile, the backplane interface handles all power and data transfers.
| Parameter | Specification |
|---|---|
| Full Model No. | IS200EHFCH2A IS200EHFCH2ACB |
| Manufacturer | GE Industrial Systems (General Electric) |
| Series | Mark VI Speedtronic |
| Board Category | Printed Circuit Board (Exciter Firing Control) |
| Weight | Approximately 0.36 kg |
| Dimensions (H x W x D) | 6.0 cm x 23.0 cm x 3.0 cm |
| Firing Pulse Channels | 12 thyristor firing channels |
| Feedback Inputs | 6 firing verification inputs |
| Pulse Width | 50 to 200 microseconds programmable |
| Firing Frequency | Up to 360 Hz |
| Pulse Voltage | 15 VDC typical |
| Terminal Type | Screw terminal connectors |
| Backplane Interface | VME compatible |
| Energy Storage | Capacitors for pulse shaping |
| Coating (for ACB) | Conformal coated against moisture and dust |
Installation and System Integration
Install the IS200EHFCH2A IS200EHFCH2ACB into any standard VME rack slot. The board connects directly to thyristor firing circuits through its terminals. Meanwhile, the backplane supplies power and communication to the board. Therefore, proper insertion ensures reliable firing control.