GE IS200ESELH3A Exciter Selector Board for EX2100 Control

June 12, 2026 • 3 min read • wayne • Science

Product Summary

The GE IS200ESELH3A Exciter Selector Board manages critical gate pulse signals for the EX2100 excitation controller. This board communicates directly with the EMIO board to fire SCRs. It provides clear LED status indicators for quick diagnostics and optimal performance.

Expert Technical Evaluation & Performance Review

The IS200ESELH3A functions as the third and final group within the ESEL board series. This board contains six bridge drivers for precise signal management. It sends gate pulse signals to the EMIO board for processing. The EMIO board then transmits these signals to one of the EGPA boards. Up to six sets of cables carry these signals for firing SCRs. This signal chain ensures reliable excitation control in demanding industrial environments.

The board features three critical LED indicators for status monitoring. The first LED confirms the board has power and is operational. The second LED signals the board is in a state of readiness. The third LED reveals the board is gating from EMIO inputs. This gating function actively manages electrical signals within the system. Together, these LEDs provide straightforward monitoring for quick diagnostics.

When using this board with EGPA models in the power conversion cabinet, remember redundancy requirements. If you have any redundant control models, you must use two ESEL boards. This configuration ensures continuous operation even if one board fails. The board ships with a weight of 6 pounds and dimensions of 18x12x12 inches.

Product Procurement & Buyer Guide

The IS200ESELH3A is a control board from General Electric Company USA. It belongs to the EX2100 Excitation Controller series. The common revision for this model is IS200ESELH3AAA. You can purchase this board in new or refurbished conditions. The country of origin for this board is the USA.

This board has very little information or market availability. Although this board is mostly obsolete, AX Control does its best to keep this board in stock. The board uses two primary manuals for installation and operation. The GEH-6632 manual covers the entire EX2100 series. The GEI-100456 manual is a product-specific guide for IS200ESEL parts. Always reference these manuals for proper deployment.

The board sends gate pulse signals to correspond with the EMIO board. The EMIO board uses these signals to communicate with the EGPA boards. This communication helps with firing SCRs for excitation control. The IS200ESELH3A uses a different number of bridge drivers than other ESEL boards. This board contains six bridge drivers for its specific role.