IS200VSVOH1BED

About the IS200VSVOH1BED

The IS200VSVOH1BED is a PCB component made by General Electric for their Mark VI system.  The Mark VI was one of GE’s last gas/steam turbine management systems released as part of their long-running “Speedtronic” line, which began in the 1960s when the first Mark I system was sold.  The Mark VI is a technologically advanced turbine management system that includes Ethernet communications capabilities. It has integrated software and hardware and includes an operator interface (also known as an HMI or Human Machine Interface) built around a PC with a Windows operating system.

The IS200VSVOH1BED functions within the Mark VI system as a Servo Control board.  The board controls four electro/hydraulic servo valves that drive fuel or steam valves.  The valve position is measured using LVDTs, or linear variable differential transformers.  A loop control algorithm is run using the IS200VSVOH1BED board.

The IS200VSVOH1BED includes a single-slot front faceplate.  This faceplate includes information like the manufacturer’s logo and the board number.  The faceplate also includes several components, like a cable connector (J5,) and three LED components (Run/Fail/Stat.)  

The IS200VSVOH1BED is populated with over seventy integrated circuits.  The board has various capacitors and resistors on its surface. TP test points are located in several locations.  The board also has four relays on its back edge (K1 through K4.) The board has six connectors beyond the J5 connector in the front panel.  This includes two backplane connectors and four connectors made from conductive traces.

More information about the diagnostics, specifications,  operation, and components of the IS200VSVOH1BED can be found in GE publication GEH-6421.  This publication also includes installation guidelines.