IS200VSVAH1ADD

About the IS200VSVAH1ADD

The IS200VSVAH1ADD functions within the General Electric Mark VI system as a Servo Control card. This card connects to two terminal boards (TSVAs.) These boards control up to four electro-hydraulic servo valves that start the steam/fuel valves. They provide TMR (triple modular redundancy) control for retrofit applications if three-coil servo valves are not present.

The IS200VSVAH1ADD has a faceplate with components mounted into it, including three LED indicators. The LEDs are green, red, and yellow. The faceplate has three cable connectors that are labeled “J5,” “J7,” and “J8.”

The IS200VSVAH1ADD is built with four relays. It has two backplanes (P1 and P2) located on the back edge of the board. The board has multiple integrated circuits, including field-programmable gate arrays and digital signal processors. It has transistors, TP test points, diodes, resistors, and capacitors. Some components are located on the rear edge of the board. The board has an internal sample rate of 200Hz and a pulse rate accuracy of 0.05% of reading with 16-bit resolution at a 50 Hz frame rate. The board has multiple ferrite beads to minimize high-frequency noise.

While some Mark VI models have abundant documentation on how they will function in the Mark VI system and alongside other models, such as the TSVA terminal boards in the IS200VSVAH1ADD models case, information for the VSVA models is difficult to find. It would be best to contact General Electric directly to see if they have information on this model, which would now be considered outdated.