DS3815PXCA

About the DS3815PXCA

The DS3815PXCA  is a PCB manufactured by GE as a component for their Mark IV gas and steam turbine control system.  The MKIV is designed around multiple microcomputers that monitor the protection parameters and critical controls in the turbine system twenty-four hours a day and uses a two-out-of-three voting system on all major decisions.  If one system issues a command but the other two do not, the system will ignore that command; in this way, the MKIV minimizes turbine outage rate and increases reliability.

The DS3815PXCA is built with three (TP) test points, a set of spare PTH and two PCB connectors, including one that is marked 218A4553-1 A/mp 533002-1 8705 and one marked 218A4637-P6 8920.  The latter is a male right-angled connector.

The DS3815PXCA has five LEDs (light emitting diodes,) including one amber that is marked IMOK, and four red marked LOCAL, BUS, CHAN, and ACTIVE.   The board has five jumper switches. J7 toggles between 5.5 MHz and 11 MHz and J8 is marked TEST.

The DS3815PXCA is built with five relay network arrays and over forty integrated circuits, including CHMOS single-chip 8-bit microcontrollers, octal buffers and line drivers, triple 3-input NAND gates, and hex inverting gates.

The DS3815PXCA is factory drilled and marked along the top edge with the letters A through J.  Nylon extractors have been installed in two corners. These clips aid technicians by adding a lever point to use to pull a board out of a tight location, as well as adding a handle to the board.  Technical support for the DS3815PXCA was originally provided by General Electric.  This includes publications for the end-user like datasheets and manuals.

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