IS200EXHSG2AEC: The G2A Group in the EXHS Family

The IS200EXHSG2AEC belongs to the G2A group of GE's EXHS family — High-Speed Static Exciter Terminal Boards used in the EX2100 excitation control system that runs alongside Mark VI or Mark VIe turbine control. Functionally, every board in this family does the same core job: it distributes signals to the exciter's main I/O board (EMIO) through P1/P2 backplane connectors, and it handles pilot relay contact outputs, contact inputs, and signal conditioning. What sets the EXHS apart from GE's standard EXTB terminal board is that it's built for high-current service, using solid-state relay drivers on its DC contactor outputs instead of conventional electromechanical relays, so it can work with a high-speed contactor in higher-current protective circuits.

Physically, this is a terminal board, not a VME card — it has no metal installation faceplate and doesn't mount in a Mark VI VME rack, even though it carries the same IS200 prefix used on turbine control boards that do. Expect three D-shell cable connectors along the front edge, eight plug connectors, fifteen integrated circuits, seven relays, a heat sink, and a mix of electrolytic, ceramic, and polyester-vinyl capacitors on the board.

Before You Order, Check the Contactor and Wiring

A trip or relay-driver alarm doesn't automatically mean this board has failed. Work through the following:

• Test the DC contactor and its coil circuit for continuity. A mechanical or wiring issue on the contactor side reproduces the same fault symptoms as a bad relay driver on the board.
• Check relay states and LEDs against the actual field wiring rather than relying only on the alarm description, to isolate a control-logic fault from a wiring fault.
• Check the P1/P2 connection to the EMIO board and the EMIO board itself before assuming the fault originates here.
• Confirm your application genuinely requires the high-current EXHS design and not a standard EXTB terminal board.

Once the contactor, wiring, and EMIO connection check out, ordering this board is the appropriate next step.

What the IS200EXHSG2AEC Suffix Tells You

IS200 is the platform prefix, EXHS is the function code, and G2AEC is the group and revision — G2A marking a different group than the G1A, G3A, and G4A boards also stocked in this collection, with EC marking this specific hardware revision. Treat each G-group as a distinct hardware generation and always match the complete part number rather than assuming any EXHS board is a universal fit. Our GE Speedtronic Part Number Decoder explains how these IS200 strings are structured.

Related Boards

The nearest relative to this board is the standard IS200EXTB terminal board, built for standard-current circuits without the solid-state relay drivers. On the rack side, it connects to the EMIO (EX2100 Main I/O) board over P1/P2. If your fleet also includes older Mark IV/Mark V equipment, 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 to Include in Your Quote Request

• Full part number with suffix: IS200EXHSG2AEC
• Revision from the label
• Photo of the ID label
• Exciter/turbine model and unit ID
• Planned outage or urgent need
• Quantity

Request a Quote

This IS200EXHSG2AEC is listed as new surplus, no box, 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	IS200EXHSG2A Mark VI IS200
Description	IS200EXHSG2A By General Electric IS200EXHSG2AEC Exciter Relay Driver Board NSNB
Condition	newSurplusNoBox With 1 Year Warranty.