IS200EXHSG1AEB: Function and Placement

The IS200EXHSG1AEB is a High-Speed Static Exciter Terminal Board from GE's EX2100 excitation control platform, the static exciter system paired with Mark VI or Mark VIe turbine control on most gas and steam turbine-generators. Its core job is distributing signals to the exciter's main I/O board (EMIO) through P1/P2 backplane connectors, while handling pilot relay contact outputs, contact inputs, and signal conditioning on the excitation side. It is built as a near-duplicate of GE's standard EXTB terminal board, but with solid-state relay drivers on its DC contactor outputs in place of conventional electromechanical drivers — a design choice made specifically to support a high-speed contactor in higher-current protective circuits.

Although it carries the same IS200 prefix used across Mark VI turbine control boards, this is a terminal board, not a VME card — it has no metal installation faceplate and doesn't plug into a VME rack. Physically, expect three D-shell cable connectors along the front edge, eight plug connectors, fifteen integrated circuits, seven relays, a heat sink, and a combination of electrolytic, ceramic, and polyester-vinyl capacitors. It's cataloged alongside Mark VI IS200 boards because EX2100 excitation and Mark VI turbine control are almost always installed and maintained together on the same unit.

Before You Order a Replacement, Check These

An exciter trip or relay-driver alarm isn't automatic proof that this board has failed. Work through the following:

• Test the DC contactor and its coil wiring directly. Since driving that contactor is this board's core purpose, a mechanical or wiring problem on the contactor side can trip the system in a way that looks identical to a bad board.
• Separate a control-logic fault from a field-wiring fault by checking relay states and LEDs against the actual circuit, not just the alarm description.
• Remember this board feeds the EMIO board over P1/P2 — a fault reported at the regulator level can originate in that link or in the EMIO board itself, not here.
• Confirm you actually need the high-current EXHS design rather than a standard EXTB terminal board — the two are close relatives but built for different current ratings, and swapping one for the other isn't a safe assumption.

With the contactor, wiring, and EMIO link confirmed good, this board is the correct part to order.

Decoding the IS200EXHSG1AEB Part Number

IS200 is the platform prefix, EXHS the function code, and G1AEB the group and revision — G1A for the group/generation, EB for the specific revision. GE's G-series grouping on this board works the same way H-series grouping works on other IS200 boards, so treat the complete string as what needs to match, not just "EXHS." See our GE Speedtronic Part Number Decoder for a full walkthrough of how these part numbers are built.

Related Boards

The nearest relative to this board is the standard IS200EXTB terminal board, which performs the same basic function at standard current ratings without the solid-state relay drivers. On the rack side, it connects to the EMIO (EX2100 Main I/O) board through its P1/P2 connectors. For teams also supporting older Mark IV/Mark V hardware, see our Mark V vs Mark VI: DS200 to IS200 guide and GE Mark V DS200 Boards Explained article. Browse the rest of the family in our GE Mark VI IS200 Boards collection or the wider GE Speedtronic Turbine Control Boards collection.

What We Need to Quote This Board

• Full part number with suffix: IS200EXHSG1AEB
• Revision from the label, if visible
• Photo of the ID label
• Exciter/turbine model and unit ID
• Planned outage or urgent need
• Quantity

Request a Quote

This IS200EXHSG1AEB is listed in used, factory packaged condition, with a 1-year warranty (see table below). We don't publish pricing — every request gets a direct quote, usually within 24 hours. We ship worldwide DDP, accept purchase orders, and support both planned outages and urgent breakdown needs.

General Information about the Product
Part Number	IS200EXHSG1A Mark VI IS200
Description	GE IS200EXHSG1A IS200EXHSG1AEB Printed Circuit Board Mark VI
Condition	used Factory Packaged. With 1 Year Warranty.