IS200VCCCH1B is a Discrete Input/Output Board manufactured by General Electric as a part of the Mark VI series used in gas turbine control systems. Four terminal boards take discrete inputs, and the board controls relay outputs. The board is intended to be installed in a VME I/O rack. The front faceplate of the board is made up of LED components and various connecting components. These parts are clearly indicated. Two DC power supply, TP test points, resistors, capacitors, diodes, and over thirty transistors are all on the board's surface. There are various connectors on the board as well, including two backplane connectors and six vertical pin connectors.