DS3800XPEN

About the DS3800XPEN

DS3800XPEN  Circuit Board for General Electric Mark IV 

The DS3800XPEN is a GE Mark IV board component that is used in one of GE’s Speedtronic systems for the control of gas and steam turbines.  The Mark IV was the first of the Speedtronic line to offer TMR architecture with three identical control sections (R/S/T) run by microcomputer with diagnostics down to the board level. This revolutionary design caused a significant increase in reliability as compared to the previous Speedtronic system (MKII.)  

The DS3800XPEN circuit board is mounted to a carrier layer via two screw connections.  The board is drilled in at least ten places along two edges.   The board is marked with codes and alignment markings, as well as reference designations relating to board components.  There are only a few components on the board surface, primarily mounted along the board edges.  This includes connectors like a twelve-position terminal strip with screw mounts.  Each screw mount in the terminal strip is numbered and individually labeled.   On the opposite edge, the board has a single vertical pin cable connector placed next to a vertical pin header connector.  Other components on this edge include spare PTH and two electrolytic capacitors. 

Other board components include three stab-on connectors, a line of pin connectors placed between two vertical metal poles, a single TP test point, two jumper switches, and diodes, metal film resistors, carbon composite resistors, and various capacitors.   

More information about the board, including important details about handling and installation, may be found through GE technical support publications like user guides and data sheets.