I/O modules

Core Function in Excitation Control

The GE IS200ESELH1A is an Exciter Selector Board from the EX2100 excitation control series. This board receives six logic-level pulse signals from a connected EMIO (Exciter Master I/O) module. It then distributes these critical gate pulse signals via cables to the downstream EGPA (Exciter Gate Pulse Amplifier) boards. Consequently, it plays a direct role in controlling SCR gate firing for the generator’s excitation system.

Redundancy and Board Group Specifications

For systems employing redundant control architectures, you must use two IS200ESELH1A boards. This model belongs to the ESEL1 group, which requires only a single bridge driver for operation. The specific ESEL group defines the internal bridge driver count and configuration. Furthermore, this board is integral for the proper operation of other key components within the EX2100 control cabinet.

Technical Specifications and Documentation

As a dedicated component within GE’s excitation control ecosystem, it ensures precise signal routing. Its performance is critical for maintaining stable generator field current and voltage regulation. The following table summarizes its primary identification and functional parameters.

Installation and System Integration

Always consult the dedicated GEI-100456 manual for installation, configuration, and maintenance procedures. The GEH-6632 EX2100 User’s Guide also provides relevant system context on page forty-eight. Proper cabling between the EMIO, this ESEL board, and the EGPA boards is essential for reliable operation. The GE IS200ESELH1A is therefore a vital link in the signal chain for reliable power generation exciter control.

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