GE Fanuc IS200EMIOH1ACA/EMIOH1A Exciter Main I/O Board

GE IS200EMIOH1ACA – Printed Circuit Board for Mark VI Speedtronic

Technical Specifications

Frequently Asked Questions

Q: What revisions does the IS200EMIOH1ACA PCB employ?
A: It includes two functional revisions (rated A and C) and one artwork revision (rated A).

Q: Which revisions are backwards-compatible?
A: The first two revisions (A and C) are backwards-compatible with corresponding Mark VI series revisions.

Product Overview

The IS200EMIOH1ACA is a critical printed circuit board within GE’s Speedtronic Mark VI turbine control system. This system features a Windows-based Human-Machine Interface (HMI) that centralizes data access and operator control. The HMI is non-essential and can be reset or replaced without impacting turbine control.

The Mark VI series represents a significant advancement over the previous Mark V series, expanding applications beyond steam and gas turbines to include alternative energy systems such as wind turbines.

Hardware Features and Specifications

• Form Factor: Double-height, single-slot VME-style board.

• Function: Manages input/output signals from various boards including EXTB, EACF, ECTB, and EPCT.

• Signals Handled: Potential Transformer (PT), Current Transformer (CT), output relay drivers, contact inputs, and pilot trip relay drivers.

• Indicators: Two LEDs on the front faceplate serve as Power and Status indicators.

• Mounting: The front faceplate includes clips to secure the board within the rack.

• Connectors: Two backplane connectors on the rear edge labeled P1 and P2.

• Component Density: Populated with over 400 resistors, 400 capacitors, multiple diodes, about 80 integrated circuits including FPGAs, transistors, and test points.

• Markings: Clearly labeled with board ID, manufacturer logo, reference designators, and codes for component identification.

• Coating: Conformal PCB coating (normal type) for protection and reliability.

Additional Notes

• The IS200EMIOH1ACA board integrates into the broader Mark VI Speedtronic turbine control system, known for advanced voltage regulation and control functions.

• As one of the latest Mark Series implementations of GE’s patented Speedtronic technology, detailed documentation can be limited online, making this board a valuable reference for hardware specifics within the Mark VI series.

• The product number IS200EMIOH1ACA encodes key details such as its functional role (EMIO), assembly group (Group 1), PCB coating, and revision history.