IS220PPROH1A GE Mark VI component

The IS220PPROH1A is a Turbine specific I/O module.  It is designed to provide a direct interface to specific turbine field devices.  This setup eliminates or reduces much of the previously needed instrumentation needed to make the connection to field devices, and also improves running reliability and reduces long term maintenance.   The IS220PPROH1A typically works with the TREAH_A terminal board and is used in Aeroderivative Turbine Emergency trip applications. The component can connect to either barrier or box type terminal blocks.  The IS220PPROH1A has field wiring restrictions for voltage sensing that limits cable length to 1,000 feet of 18 AWG wiring. It is important to note the IS220PPROH1A cannot be auto-reconfigured when swapping a BPPB P-Pack with a BPPC P-Pack.  

The  IS220PPROH1A is built with a front faceplate that is marked with the component id number and several LED indicators.  These are placed on the front faceplate in pairs. The first pair is labeled PWR/ATTN, the second LINK/TxRx and ENET 1, and the third LINK/TxRx and ENET2.  A final component is located at the bottom of the faceplate; this is labeled IR Port.

The  IS220PPROH1A  accepts three speed signals.  This includes deceleration, acceleration, and overspeed.   The component also has hardware implemented overspeed. The pack monitors the status and operation of selected trip boards through a set of comprehensive feedback signals.   The pack supports TMR and simplex back up protection.

The  IS220PPROH1A  is built with a high speed processor and two fully independent 10/100 Ethernet ports.  The pack has a hardware reset circuit and watchdog timer. Temperature is monitored by an internal sensor.