General Electric Speedtronic Mark VI IS200SRTDH2A is a Simplex Terminal Relay Board that is a part of the gas turbine control system. IS200SRTDH2A is a compact printed circuit board comprising a variety of electronic components. On the bottom edge of the IS200SRTDH2A, there are two huge terminal blocks, one on top of the other. There are eighteen terminals in each of the terminal blocks, for a total of thirty-six terminals. The white writing on the silver metal terminals inside the terminal blocks is numbered from one to thirty-six. The IS200SRTDH2A has one big connector port on the upper border. Extra components or other boards can be connected to the IS200SRTDH2A using this connector port.
A collection of diodes and capacitors occupy the middle of the IS200SRTDH2A. The diodes are black rectangles in shape. There are twenty-four diodes in all, divided into two horizontal rows, each with twelve diodes.