The IS220PPROH1A is a GE Backup Turbine Protection (PPRO) I/O pack
used in Speedtronic turbine control systems to provide an independent
layer of emergency protection, including backup overspeed protection,
generator synchronization checking, and watchdog monitoring of the
primary control system. It is typically deployed in Triple Modular
Redundant (TMR) or simplex configurations together with SPRO
or TPROH terminal boards, or directly mounted on TREA/TREAH
boards depending on system design. The unit includes a local
processor, power supply, data acquisition hardware, and two
independent 10/100 Ethernet ports for IONet communication.












