GE IS220PPROS1B Backup Turbine Protection I/O Pack

The GE IS220PPROS1B functions as a dedicated backup turbine protection I/O pack. This module belongs to the Mark VIe series from General Electric. It provides redundant protection for critical turbine trip functions. Consequently, this pack ensures safe shutdown even when the primary system fails.

Technical Specifications

The table below lists the precise parameters for the GE IS220PPROS1B .

Parameter	Specification
Manufacturer	General Electric (GE)
Full Model Number	GE IS220PPROS1B
Product Category	Backup Turbine Protection I/O Pack
Dimensions (H x W x D)	2.5 cm x 18.0 cm x 15.0 cm
Weight	0.55 kg (1.21 lbs)
Primary Interface	Two 50-pin backplane connectors
Trip Inputs	8 dedicated overspeed and over-temperature inputs
Trip Outputs	4 redundant relay outputs for emergency shutdown
Component Count	Approximately 160 resistors and 70 capacitors
Energy Storage	Four 100 µF capacitors for trip circuit hold-up
Response Time	Less than 5 milliseconds
Operating Temperature	-30°C to +65°C

Functional Design and Redundant Protection

The GE IS220PPROS1B connects directly to the Mark VIe backplane. It monitors turbine speed and temperature independently from the main controller. Then, this pack activates trip relays without waiting for CPU confirmation. Each input includes hardware-based voting logic for high reliability. Therefore, the IS220PPROS1B provides true fail-safe protection for critical assets.

Installation and Compatibility Notes

You must wire the trip contacts in series with the primary protection path. The GE IS220PPROS1B fits exclusively into Mark VIe series cabinets. Always replace faulty units with identical GE pack revisions. Additionally, test each trip channel during scheduled maintenance. This practice confirms proper operation of the backup protection system.