General Electric IS220PPRAH1A Emergency Turbine Backup Protection I/O Module

The GE IS220PPRAH1A Emergency Turbine Backup Protection I/O Module is a critical component in GE’s Mark VIe control system architecture, designed to provide high-integrity, independent protection for industrial and power generation turbines.

This module acts as a secondary backup to the primary turbine controller, providing fast and reliable emergency shutdown capability for gas and steam turbines in the event of a critical fault or controller failure. The IS220PPRAH1A module is specifically engineered to interface directly with the turbine trip mechanisms, emergency shutdown devices (ESD), and overspeed protection systems.

It operates independently of the primary control system logic, with hardwired inputs and outputs for maximum integrity and response time. Featuring robust diagnostics, isolated I/O, and compliance with rigorous industry safety standards, the IS220PPRAH1A ensures an added layer of protection to safeguard critical equipment and personnel.

Product Specifications

Product Applications

The IS220PPRAH1A module is an essential safety and protection component in the following applications:

• Gas Turbine Emergency Shutdown

  Provides direct interface with trip solenoids and shutdown valves in gas turbine systems.

• Steam Turbine Overspeed Protection

  Monitors critical overspeed conditions and initiates rapid protective trips.

• Combined Cycle Plants

  Functions as backup protection for both gas and steam turbines in CCGT applications.

• Industrial Process Turbines

  Protects mechanical drive turbines used in refineries, petrochemical plants, and industrial compressors.

• Nuclear Auxiliary Systems

  Provides hardwired, independent emergency shutdown paths for safety-critical turbines.

• Retrofits and Upgrades

  Enables modern SIL-compliant backup protection when upgrading older GE Mark V or Mark IV systems.

Product Advantages

• Independent Operation

  Functions independently of the main turbine controller to ensure backup protection even during controller faults.

• High-Speed Response

  Output response time <10 ms for fast and decisive protective actions.

• SIL Compliant

  Meets IEC 61508 SIL safety requirements for turbine protection.

• Isolated I/O Channels

  Full isolation prevents unwanted interactions between field devices and system grounds.

• Extensive Diagnostics

  Monitors input status, output health, and internal watchdogs for maximum system reliability.

• Redundant Ethernet Interface

  Ensures secure and reliable communication with the plant control network.

• Hot-Swappable

  Designed to support easy maintenance and field replacement when paired with compatible terminal boards.

• Flexible Deployment

  Panel or DIN rail mounting for versatile installation.

Frequently Asked Questions (FAQ)

1. What is the main function of the IS220PPRAH1A module?

   It provides independent emergency shutdown and backup turbine protection in critical systems.

2. How many discrete inputs does it support?

   10 discrete high-speed input channels.

3. What are the output specifications?

   6 relay outputs rated 5 A at 24/125/250 VDC or 250 VAC.

4. How fast is the output response?

   Response time is less than 10 milliseconds.

5. Does it provide isolated I/O?

   Yes, all channels are optically isolated.

6. Is this module SIL-rated?

   Yes, it is SIL-compliant per IEC 61508.

7. Is it compatible with older GE systems?

   Yes, it can be integrated into upgrades of Mark V and Mark IV systems.

8. How is this module powered?

   It uses external 24 VDC with optional redundancy.

9. Can it be hot-swapped?

   Yes, when used with appropriate terminal boards.

10. What type of turbines is it used on?

    Gas turbines, steam turbines, combined cycle, and mechanical drive turbines.