GE IS200ERAXH1A Ethernet Adapter Board (ERAX)

The GE IS200ERAXH1A is a critical component within the Mark VIe distributed control system, serving as an Ethernet adapter (ERAX) for I/O packs. It enables high‑speed communication between field I/O modules and the control network, ensuring real‑time data exchange for turbine and generator control applications. The board is designed to meet the rigorous demands of power generation and industrial environments, offering reliability and redundancy.

Key Features

• Dual 10/100 Mbps Ethernet ports with automatic failover for network redundancy

• Supports I/O Net protocols for communication with I/O packs (e.g., IS200 series)

• On‑board processor for handling communication stacks and data routing

• Status LEDs for link/activity and fault indication

• Compact design for mounting in Mark VIe racks

• Operates from the rack backplane power supply

• Compatible with GE’s ToolboxST configuration software

Technical Specifications

Functional Description

The ERAX board acts as a bridge between the control network (typically Ethernet) and the I/O packs connected via a proprietary backplane bus. It collects process data from analog and digital input modules and sends control signals to output modules. The dual Ethernet ports support redundant network topologies (e.g., ring or star) to maintain communication even if one path fails. The board also handles time synchronization using IEEE 1588 or simple NTP, ensuring coordinated data sampling across the system.

Applications

• Gas and steam turbine control systems (Mark VIe)

• Generator excitation and protection systems

• Balance of plant (BOP) control in power plants

• Industrial processes requiring high‑availability I/O communication

• Retrofit and upgrade of legacy GE control systems

Installation and Maintenance

The IS200ERAXH1A plugs directly into a dedicated slot in a Mark VIe rack. No field wiring is required except for Ethernet cables. The board is hot‑swappable in most configurations, allowing replacement without shutting down the entire system. Regular firmware updates can be performed via the control network using ToolboxST. Diagnostic information is accessible through the controller’s human‑machine interface (HMI) or directly via the board’s status LEDs.

Reliability and Quality

Manufactured by GE, the IS200ERAXH1A undergoes rigorous testing including burn‑in and functional validation. It is designed for long service life in harsh environments, with conformal coating options available for protection against moisture and contaminants. The board meets international standards for industrial emissions and immunity (IEC 61000‑6‑2, IEC 61000‑6‑4).

The GE IS200ERAXH1A Ethernet adapter is an essential building block for modernizing turbine control and ensuring robust, high‑speed communication within critical infrastructure.