The DS3815SSSA1B1B is a PCB made as a component for GE’s Mark IV series. The Mark IV is used to manage steam and gas turbine systems, and is built with integrated microprocessors that run overlapping systems to protect the turbine and minimize downtime. The MKIV monitors such things as overspeed, over temperature, loss of flame, high pressure, vibration, and fire. By using multiple systems that must all vote on turbine management, the MKIV increases the reliability of the system and dramatically reduces the turbine outage rate as compared to earlier Speedtronic systems.
The DS3815SSSA1B1B has twenty-four circuits populating the board. This includes 8-bit CMOS static RAM with direct TTL compatible inputs and high speed, fast access time, crystal oscillating chips set to 11.0592 MHz, octal buffers and line drivers, and octal d-type transparent latches.
The DS3815SSSA1B1B has seventeen jumper switches and ten resistor network arrays. Resistor network arrays are sometimes used for voltage division. Most jumpers on the board are designed to sit at either T or F. J0 toggles between TEST and RUN. The board also has three TP test points and a set of spare PTH.
The DS3815SSSA1B1B has three mating connectors to communicate with other printed circuit boards. This includes one vertical male connector with 34 pins. The other two connectors are right-angled connectors. One is marked 218A4553-1 and one is marked 218A4637P2. The board has four light emitting diodes.
The DS3815SSSA1B1B is built with both metal film and carbon composite resistors. Capacitors vary, but include many fixed vacuum capacitors. The board has extractor clips installed.
All technical support for the DS3815SSSA1B1B was the responsibility of General Electric. This includes publications like manuals and datasheets.