The IS200ERRBG1A developed by General Electric is a manufactured part created to fit into the Mark VI system. The board functions primarily as an Exciter Regulator Redundant Backplane that typically fits within GEâs EX2100 Control System, a third-generation digital excitation system designed to coordinate with the MKVI, its hardware, and HMIs. The system can also be used with user retrofit applications using communication protocols like serial or Ethernet Modbus. This board is able to provide connectivity to all PCBs mounted within it and via cable connectors powers externally mounted boards and Modules. It is made up of the C and M2 control sections of the regulator in redundant applications with the C control section including boards like ERIO, EISB, and DSPX as well as their connectors. The M2 section contains boards such as EROC, ERDD, EPSM, ERIO, DSPX, and AXLA. As this board has several components iit must be stored in a dry, clean and cool location. It has been designed to include a fan to allow for air cooling of components mounted within its framework.