GE Mark VI IS200ESELH1AAA Exciter Collector BoardDescription The IS200ESELH1AAA is an Exciter Selector Board developed by General Electric (GE) as part of the EX2100 Control System. This board is mounted within the control rack, which serves as a central hub for managing various control and signaling functions within the excitation system. It integrates seamlessly with the control rack, ensuring stable and secure placement, which is essential for the reliable operation of the exciter system.