IS200EXHSG4A | General Electric | High-Speed Relay Driver Board

GE IS200EXHSG4A Exciter High-Speed Relay Driver Board

Configured for high‑speed dc‑contactor and pilot‑relay actuation in EX2100 excitation networks, the GE IS200EXHSG4A (IS200EXHSG4A Exciter High‑Speed Relay Driver Board) provides direct electrical execution of flashing, de‑excitation, and contact‑wetting circuits through fixed backplane routing.

Hardware Specifications

Backplane Bus Communication Velocity Licenses

As part of GE’s EX2100 excitation platform, the IS200EXHSG4A aligns with deterministic backplane timing required for synchronous relay‑driver sequencing. The board routes trip, flashing, and de‑excitation signals through fixed‑cycle communication paths to EMIO controllers. Firmware flash compatibility resides at the EMIO level; EXHS hardware characteristics remain static across revisions. I/O density scaling is achieved through the EBKP backplane, allowing multiple EMIO boards (M1, M2, C) to receive identical contact‑status signals without altering communication velocity.

Frequently Asked Questions

Q: Can the IS200EXHSG4A be hot‑swapped? A: No. Removal or insertion under power may cause unintended relay actuation and should be avoided.

Q: How does the board handle redundant EMIO configurations? A: Contact inputs are fanned to M1, M2, and C controllers. J515 (C) omits de‑excitation and crowbar signals.

Q: Does the board modify wetting‑voltage behavior? A: No. Wetting voltage (63–84 V DC) is supplied through J12M1 and J12M2; EXHS only routes and conditions the resulting feedback signals.

Field Installation Guidelines

• De‑energize the exciter and verify all I/O circuits are off before handling the board.
• Label all cables prior to removal to ensure correct reconnection to J505, J508, and J515.
• Maintain separation between contact‑wetting wiring and high‑energy field‑flashing circuits.
• Use a non‑conductive barrier beneath the board during removal to prevent dropped hardware from entering the rack.
• Confirm the replacement board type (G1 or G2) matches the original before installation.
• Ensure all connectors are fully seated and the cabinet door is closed before re‑energizing the system.