The DS3800DGRD is an auxiliary card produced by General Electric as part of the Speedtronic Mark IV series of turbine controls.
The circuit board has large 100 volt cylindrical yellow capacitors, as well as medium cylindrical yellow capacitors marked with 7081A and small 80 volt cylindrical yellow capacitors. On one half of the circuit board are twenty-seven (27) black potentiometers. Potentiometers are variable resistors which are typically marked with the minimum and maximum values in Ohms. The auxiliary card features multiple jumper pins which have blue jumpers. On the board are many striped resistors and diodes in various colors as well as many solid-colored resistors and diodes. The auxiliary circuit board features two connector ports which are black on the edge of the board. The board has on red switch as well as one black switch between the connector ports. The board has several test points lined up next to the jumpers. On one half of the circuit board are many gold square capacitors.
The Speedtronic Mark IV Control System developed from its predecessors, the Mark I and Mark II systems. Those earlier systems were founded on the automation of turbine control techniques, as well as sequencing and turbine protection techniques that came about in the 1940s. The Mark IV system is the product of over half a century of the creation and refinement of new technologies. The Mark IV system was developed for the fulfillment of all requirements for controlling a turbine including controlling fuels within the requirements of speed and load control.
The DS3800DGRC1E1C auxiliary card will be shipped to the user in a bag which will dissipate any static electricity prior to operation in order to protect the user.