Description

General Electric created the DS3800NADB1B1B to function as a 12-bit analog/digital converter card within their Speedtronic Mark IV system. The Mark IV is a gas and steam turbine control system with integrated chipsets and two-out-of-three voting redundancies on all protection parameters and critical controls.

The DS3800NADB1B1B works as a motherboard for the auxiliary board DS3800DADB. The auxiliary board significantly increases the capacitance of DS3800NADB1B1B due to its eight 708A1 200V M/E capacitors.

The DS3800NADB1B1B has the following specs:

• -spare plated through-holes near the right edge

• -one LED (amber.) This is marked 'p ok.'

• -three test points (TPs) Each is individually marked.

• -three connectors to communicate with other PCB modules. A ribbon cable connects the DS3800NADB1B1B to its daughter board. One male connector populates one short edge, and a female connector populates the other.

• -two potentiometers.

• -extractor tabs installed in both the top and bottom right corners

• -alignment-marked

• -jumper switches for customization. 'Range' can be changed with J1, 'parity' with J2. J3 is marked 'OSC.'

• -multiple integrated circuits, including the ADC85H-12 12-bit A/D converter with reference and clock. The design of this chip includes scaling resistors that provide analog input signal ranges of +/-2.5, +/-5, +/-10, 0 to +5, or 0 to +10 volts. All digital signals are DTL and TTL compatible, and the data output is negative-true and available in either serial or parallel form.

All technical support for the DS3800NADB1B1B including manuals, data sheets, and other publications was provided originally by GE. Installation guidelines may be found within these publications.