Product Overview

The General Electric IS200EMIOH1AFB serves as a central interface component for the EX2100 Excitation Control System, operating within the Mark VIE control architecture. This Exciter Main I/O board is engineered to process high-level signals essential for synchronous generator control, including Potential Transformer (PT) and Current Transformer (CT) feedback. By consolidating contact inputs, relay drive outputs, and trip functionality onto a single platform, the EMIO card acts as the primary sensory and command hub for the excitation lineup.

A critical operational role of the IS200EMIOH1AFB is the generation of logic-level gate pulses. These signals are routed to the ESEL board and subsequently to the EGPA board located in the power conversion cabinet, facilitating precise firing control for the bridge rectifiers. This module is an active, high-reliability solution designed for the continuous demands of power plant turbine and generator regulation.

Technical Characteristics and Hardware Architecture

• Signal Processing Capability: Integrated handling of AC voltage and current feedback, alongside discrete digital inputs and specialized pilot trip relay drivers.

• Gate Pulse Coordination: Provides the critical timing signals required for thyristor-based power conversion, ensuring stable field excitation.

• Environmental Hardening: Features advanced chemical conformal coating across the entire printed circuit board (PCB) assembly, providing superior protection against moisture, dust, and corrosive airborne contaminants compared to standard board finishes.

• Form Factor: Designed as a double-height, single-slot PCB, the module is intended for secure vertical mounting within a standard GE VME rack.

• Reliability Features: Includes robust diagnostic monitoring to ensure the integrity of feedback loops and the functionality of output relay drivers.

• System Integration: Fully compatible with Mark VIE Ethernet-based communication routers for real-time monitoring and control through the GE Speedtronic interface.

Technical Specifications

• Manufacturer: General Electric (GE)

• Model Number: IS200EMIOH1AFB

• Series Designation: Mark VIE / EX2100

• Module Category: Exciter Main I/O Board

• Mechanical Design: VME Double-Height, Single-Slot

• Coating Type: Full Chemical Conformal Coating

• Dimensions: 2.1 x 18.6 x 26.3 cm

• Net Weight: 0.22 kg

• Country of Origin: USA

• Lifecycle Status: Active

Industrial Applications

• Generator Excitation: Primary control interface for GE EX2100 excitation systems in thermal and hydro plants.

• Turbine Control: Integration with Mark VIE systems for comprehensive steam or gas turbine regulation.

• Grid Stability: Precise PT/CT monitoring to ensure generator output remains synchronized with grid requirements.

• Safety Systems: Coordination of pilot trip relays for rapid field de-excitation during emergency shutdown events.