The DS3820PS5D is a modification of several DS3800/DS3810 printed circuit boards manufactured by General Electric for the Mark IV gas/steam turbine series. The Mark IV is built upon integrated microprocessors that monitor the turbine system twenty-four hours a day for issues like fire, high pressure, vibration, and over speed and make continual adjustments to keep the system running at optimal performance. The Mark IV has an enhanced operator interface with improved reliability when compared to earlier Speedtronic systems.
The DS3820PS5D is built into a large housing. This housing is rectangular in shape with long, thin openings cut in one side to aid in heat dissipation. One short side of the housing attaches with screws and is designed to be removed to allow technicians access to the boards within. Several wires attach to the housing on this end using header connectors. Three wires connect in using round cable connections. Many cables are clipped together using nylon ties.
The DS3820PS5D also has a secondary part of its housing. This secondary housing consists of one flat metal piece with one short end attached. This end is reinforced by a triangular metal brace at each corner. The short end of the secondary housing is drilled twice for screw mounting. The secondary mounting is spaced off the primary module.
One circuit board populates the inside of the secondary housing. This circuit board is held to and spaced off the secondary housing by spacer clips held to the housing by screws. At least four of these spacers correspond to spacer pins on the surface of the PCB that also hold a plexiglass shield above the surface of the board. This shield protects roughly half of the surface of the board.
All technical support for the DS3820PS5D was provided by GE. This includes all publications like manuals and datasheets.