Description

GE manufactured the DS3800NDMA as a Div Multiply card to work within the Mark IV Speedtronic system. The Mark IV, which was created for gas and steam turbine control, uses integrated chipsets with two-out-of-three voting redundancies to maximizeefficiency and uptime.

The DS3800NDMA, which is nine inches along its longest edge, has the following specifications:

• -factory-drilled.

• -extractor clips installed. These help technicians with insertion or extraction by giving another surface to touch other than the circuitry itself. The clips also allow for leverage.

• -accepts a daughter board. The DS3800NDMA accepts DS3800DDMA1A1A as an auxiliary.Four nylon pins support the corners of the auxiliary and twenty brass, nickel plate pins lock it into place.

• -two LEDs, one red and one amber. The first is labeled 'gain,' and the last is labeled 'imok.'

• -ten trim pots. These potentiometers are placed near the top edge of the board.

• -218A4553-1 male connector. This populates the left edge of the board.

• -six jumper switches, of which three can be set between 'run' and 'test.'

• -integrated circuits (26.) This includes Motorola SN74LS38J Quad 2-input NAND buffer and Texas Instruments SN74LS14N Hex Schmitt-trigger inverter.

• -multiple capacitors and resistors. Resistors tend to be ceramic covered metal film.

• -fourteen test points.

• -two reinforcement bars made of anodized aluminum. The bars are placed at the top and bottom of the board and are in accordance with IEEE recommendations.

Only qualified technicians should attempt installation of the DS3800NDMA after reading guidelines from the original manufacturer. This information can be found in technical support publications such as data sheets and manuals referencing the DS3800NDMA.