GE IS200ERIOH1AAA – Emergency Relay Input/Output Board

Product Overview

The GE IS200ERIOH1AAA is an Emergency Relay Input/Output (ERIO) board developed for GE’s Mark VI turbine control system. Acting as a safety-critical interface, it manages both emergency input signals from field devices and relay-based output commands to protection and trip mechanisms. Its robust construction and fault-tolerant design make it a key element in turbine safety and control reliability.

Key Parameters

Specification	Description
Model Number	IS200ERIOH1AAA
Manufacturer	General Electric (GE)
Product Type	Emergency Relay I/O Board
System Compatibility	Mark VI Turbine Control Systems
Input Channels	Multiple isolated emergency inputs (digital)
Output Channels	Relay-driven emergency outputs
Mounting	Rack-mounted, plug-in module
Protection	Electrical isolation, surge suppression
Application	Gas turbines, steam turbines, industrial safety systems

Main Features

• Dual Functionality – Combines both input monitoring and output control in a single module.

• Rapid Response Time – Critical for emergency trip and shutdown actions.

• High Isolation – Protects control electronics from surges and transients.

• Diagnostic Support – Built-in health monitoring for predictive maintenance.

• Direct Rack Compatibility – Designed for easy integration into GE Mark VI racks.

Structure and Design

The IS200ERIOH1AAA is built around three core sections:

1. Input Interface – Accepts emergency stop, overspeed, and fault signals from sensors or protection devices.

2. Relay Output Section – Drives field actuators, breakers, or shutdown mechanisms.

3. System Bus Connector – Provides high-speed communication with the turbine controller.

   

Application Areas

This board is widely used in safety-critical turbine environments, including:

• Gas turbine trip and protection systems

• Steam turbine emergency stop circuits

• Generator protection and field breaker actuation

• Oil & gas and power plant shutdown mechanisms

Installation & Maintenance

• Installation – Insert directly into the Mark VI rack slot and secure with standard fasteners. Ensure connectors are aligned and follow ESD precautions.

• Maintenance – Routine visual inspection and system diagnostics recommended. In case of failure, the board should be replaced with a certified GE spare part.

Advantages

• Reduces system complexity by combining input/output functions

• Enhances plant safety with fast-acting relay control

• Minimizes downtime with easy plug-in replacement

• Backed by GE’s proven reliability in critical power generation systems

  

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