GE IS230STAOH2A | MKVIe | TERMINAL BOARD.The Mark VIe control system is a complex system used for the management of gas or steam turbine systems. It is the most advanced system in the Speedtronic series released by GE. The Mark VIe control system consists of various boards and components, including terminal boards like the IS200TTURH1B and IS200TBTCH1C. These terminal boards have multiple connectors, terminal connection points, and other components such as transformers, relays, capacitors, diodes, and resistors.