The IS200EMIOH1A is a GE Mark VI printed circuit board
The IS215VPROH1b is a GE Mark VI printed circuit board module
The IS220PTURH1A is a GE Mark VI component
The GE IS220PDIOH1A is an I/O pack module that contains two Ethernet ports, a local processor, and data acquisition board for use within the GE Mark VI Speedtronic Series.
GE Mark VI IS220PDIAH1B Speedtronic Turbine Control PCB board.
GE Mark VI IS220PTCCH1A Speedtronic Turbine Control PCB board.