The DS3815PRDB is a GE PCB manufactured as a component for the Mark IV system. The MKIV is designed to manage gas and steam turbines and is built around three identical microcomputers that monitor the turbine’s critical controls and protection parameters on a continuous basis. The MKIV increases reliability and minimizes its turbine outage rate by having these microcomputers use a two-out-of-three voting system; for example, if one of the three issues a trip command but the other two do not, the system will keep running.
The DS3815PRDB is built with five LEDs, including four red LEDs and one amber marked IMOK. The board has a set of spare PTH, three test points, and two nylon extractor clips. Extractors may be used as a lever point on the chassis frame to pull the board out of position, or they may be used as a handle, which protects circuitry and board components from being improperly handled.
The DS3815PRDB is built with five resistor networks and two jumper switches. One jumper is marked “TEST.” The other may be set either to 2K or to 8K. Most resistors are made of ceramic covered metal film. Capacitors may be fixed vacuum, ceramic, polyester vinyl, or made of another material.
The DS3815PRDB has thirty-nine circuits. This includes octal buffers and line drivers, programmable interrupt controllers, octal d-type transparent latches and edge-triggered flip-flops, and hex inverter buffers and drivers with open-collector high-voltage outputs. General Electric initially provided all technical support for the DS3815PRDB, including publications like datasheets and manuals.
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