About the DS3800NSCD
The DS3800NSCD is a PCB designed as a Speed or Current card for GE’s Mark IV series. This series was designed for gas and/or steam turbine management. The Mark IV Speedtronic system is built with triple redundant backups on all critical controls and protection parameters in order to curb downtime caused by electronics failure.
The most notable feature on the DS3800NSCD is its ten rotary potentiometers. These are placed in a line parallel to the right edge. Each is individually marked. Starting with R1, they are labeled as Spd Fdbk, Spd Gain, Ref, Rev C.L., Fwd C.L., Curr. Gain, C.L. Bias, C.L. Slope, Aux 1, and Aux 2. Potentiometers allow for voltage division. The board has one TP test point located at the end of the line of the potentiometers. This is marked “TST.”
The DS3800NSCD has been drilled at each corner, and alignment marked. It is marked 6BA03. Extractor clips are installed in each right corner. Extractors are a benefit during insertion or extraction, as they give technicians a handle and/or a lever point to work with, and allow them to move around the PCB without grasping the surface of the board, thus protecting components and the circuitry.
The DS3800NSCD has one PCB mating connector, located along its left edge. This is a 218A4553-1A/mp 102041-1 connector. The board is numbered 2, then 10 through 80 by tens behind this component.
The DS3800NSCD has a limited number of through-hole components. The potentiometers and connector already listed are through-hole components. The board also has two through-hole capacitors, located at C18 and C19. Both are 200V polyester vinyl capacitors. It also has nineteen through-hole resistors. These vary between carbon composite and metal film. All other components on the DS3800NSCD attach via quick-connect screw mounts. There are 28 pairs of quick-connect screw mounts populating the DS3800NSCD.
Technical support for the DS3800NSCD, including datasheets and manuals, was provided by General Electric.
