The DS3800NTIA is a tachometer interface board from GE for the Mark IV series. The MKIV is a gas/steam turbine management system designed to safeguard the turbine from issues like fire, vibration, and over-speed. It can automate procedures like temperature control, control sequencing, startup, and shutdown. The MKIV improved the operator interface and increased the application flexibility as compared to earlier Mark I and Mark II Speedtronic systems.
The DS3800NTIA is built with a single amber LED. It has eight TP test points and two areas of spare PTH, or plated through-holes. The board is printed in one area with a waffle pattern; there are no through-hole components or drill points in this area of the board.
The DS3800NTIA has been marked with its identification number, with the GE marking, and with the code 6BA02. One edge has “A” through “J” marked along the edge for alignment purposes. All corners are drilled for mounting. Two of these have extractor clips inserted. Extractors give technicians an optional handle if needed, to avoid handling components. They are also designed to provide a lever point for pushing the board from its position in a frame.
The DS3800NTIA has one PCB mating connector. This is a female right-angled mating connector. The board has two jumper switches and one transistor. The transistor is fitted with a heat sink. The board has four nylon vertical spacer pins located on its surface.
The DS3800NTIA is built with ten circuits. It has a single resistor network array. Resistors on the DS3800NTIA tend to be made of metal film. All technical support for the DS3800NTIA was maintained by GE.