The primary function of the Exciter Main Input/Out IS200EMIOH1A board is to manage all of the inputs/outputs from the ECTB, EACF, EXTB, and EPCT terminal boards. This board is a double-height-versa module Eurocard and is also single-slotted. Another primary function of the IS200EMIOH1A is to send gate pulse signals from the backplane to the ESEL board, after the signals have been received by the ESEL board the signals will then be sent to the EGPA board which is located in the power conversion cabinet.
When controlling the inputs and outputs of other terminal boards, the IS200EMIOH1A will control contact inputs, pilot trip relay drivers, PT and CT signals, and output relay drivers. As the EMIO board connects to the EXTB board the EMIO board will initiate de-excitation, which means that the EMIO board also controls the EDEX board that the EXTB is connected to.
When using the IS200EMIOH1A board the best manual to use is the GEI-100453 IS200EMIO Exciter Main I/O Board manual, but as that manual is difficult to find, the GEH-6632 EX2100 Excitation Control User’s Guide has information related to the EMIO board on page forty-eight.