Motorola APM-420A Emergency turbine protection plate

The IS200VPROH2B, IS200VPROH1BEF, and IS200VPWRH1AH are all protection boards used in the General Electric (GE) Mark VI turbine control system. The following is a detailed description of each:

The IS200VPROH2B is an emergency turbine protection board used in the GE Mark VI system. Together with the T PRO and TREG boards, it forms the Mark VI system's independent overspeed protection system. It has three VPRO boards (triple redundancy) and controls the trip solenoid valves via the TREG board. The board has nine thermocouple inputs for exhaust overtemperature protection, three analog current inputs, and a backup sync check protection function. It has two backplane connectors, multiple front panel connectors, a power jack, and several LED indicators. The board also includes a power supply that generates 5V DC and 28V DC power.

The IS200VPROH1BEF is a protection component board used in the GE Mark VI turbine control system, with similar functionality to the IS200VPROH1B. It has an operating temperature range of -20°C to +55°C, uses a three-pin sub-D connector for power supply, complies with UL and CE international safety standards, and features Modbus RTU communication protocol, facilitating integration with other industrial automation systems.

The IS200VPWRH1AH is a power supply board for the Mark VI system. It provides power to other components in the turbine control system, ensuring proper functioning of all parts of the system. While detailed functional descriptions of the IS200VPWRH1AH are not available at this time, these power supply boards typically provide stable power output, overcurrent protection, and overvoltage protection to ensure system electrical safety and stable operation.