DS3800HLOC

About the DS3800HLOC

The DS3800HLOC is a Logic Output circuit board fabricated by General Electric as part of their Mark IV Speedtronic system.  The Mark IV offered microprocessor control with triple modular redundant design and online diagnostics.    The system also included redundant sensor inputs that significantly reduced forced outages caused by faulty sensor issues. 

The DS3800HLOC card is built with a backplane connector on its rear edge that allows the board to be connected to the Mark IV system.  The board is stiffened across its surface with multiple board stiffeners.  This includes rails that run both longways along the board’s top and bottom edges, as well as other rails that run across the board across the surface of the board.   These second types of stiffeners tend to partition the board into equal sections, with each section being populated by several integrated circuits, several resistors, and several capacitors.  Each typically also has diodes.   The central partition also has a barcode attached to the board surface and is marked with the GE logo.  

On the front edge of the board, there is a large unit attached with seventeen LEDs attached.  These are mounted at a right angle.  Sixteen of the LED components are red.  The last component is yellow.  There is also a switch component at one end of this line of LEDs.  The board has two extractor clips installed, one per front corners.  These help technicians when trying to install or extract the board from locations where clearance may be limited and space tight.