General Electric Speedtronic Mark VI IS200TBAIH1B is an Analog Terminal Board and is a type of printed circuit board. IS200TBAIH1B is a rectangular printed circuit board with a particularly long length. The most visible components on the PCB are two huge black terminal blocks on the left side of the IS200TBAIH1B. Both of these black terminal blocks may hold twenty-four terminal pieces or a total of forty-eight. TB1 and TB2 are the names of the terminal blocks. Vertically, these two components take up the whole left side of the IS200TBAIH1B.