The IS200SPROH1AAB-MRP663860 is a circuit board manufactured by GE primarily to replace components in its Speedtronic Mark system.

It acts as a digital signal processor control board and is available in a variety of versions.

The board consists of a variety of components from small to large, and the square design makes it easy to install and use.
GE IS200SPROH1AAB Terminal Board for Mark VI Series Industrial Turbine Control Systems

In addition, the board is used as a digital signal processor board in Mark VI systems with Ethernet-enabled tri-mode redundant control options, proprietary software such as CIMPLICITY, and a Windows-based operating system.

This makes it highly compatible and interoperable in industrial automation and process control systems.