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Product Introduction
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
| Parameter | Specification |
|---|---|
| Product Name | GE IS220PPRAH1A Emergency Turbine Backup Protection I/O Module |
| Model Number | IS220PPRAH1A |
| Series | GE Mark VIe / IS220 Series |
| Function | Emergency shutdown and turbine protection I/O module |
| Inputs | 10 discrete high-speed inputs |
| Outputs | 6 relay outputs (high-speed, dry contact) |
| Input Voltage Range | 24 VDC nominal (range 18–32 VDC) |
| Output Contact Rating | 5 A at 24/125/250 VDC or 250 VAC resistive |
| Output Response Time | < 10 ms |
| Isolation | Optical isolation for all I/O channels |
| Onboard Diagnostics | Self-test, watchdog, I/O status monitoring |
| Communication Interface | Redundant Ethernet IONet |
| Power Supply Input | External 24 VDC (redundant supported) |
| Power Consumption | ~8 W typical |
| Operating Temperature Range | -30°C to +65°C |
| Storage Temperature Range | -40°C to +85°C |
| Humidity Range | 5% to 95%, non-condensing |
| Shock / Vibration Compliance | IEC 60068 |
| Mounting Type | Panel-mounted or DIN rail |
| Dimensions (H x W x D) | 330 x 170.8 mm |
| Weight | 1.2 kg |
| Certifications | CE, UL, CSA, SIL-rated (per IEC 61508) |
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)
-
What is the main function of the IS220PPRAH1A module?
It provides independent emergency shutdown and backup turbine protection in critical systems. -
How many discrete inputs does it support?
10 discrete high-speed input channels. -
What are the output specifications?
6 relay outputs rated 5 A at 24/125/250 VDC or 250 VAC. -
How fast is the output response?
Response time is less than 10 milliseconds. -
Does it provide isolated I/O?
Yes, all channels are optically isolated. -
Is this module SIL-rated?
Yes, it is SIL-compliant per IEC 61508. -
Is it compatible with older GE systems?
Yes, it can be integrated into upgrades of Mark V and Mark IV systems. -
How is this module powered?
It uses external 24 VDC with optional redundancy. -
Can it be hot-swapped?
Yes, when used with appropriate terminal boards. -
What type of turbines is it used on?
Gas turbines, steam turbines, combined cycle, and mechanical drive turbines.
Recommended Related Models
| Model Number | Description |
|---|---|
| IS220PPROH1A | Turbine Protection Module |
| IS220PAICH1B | Analog Input Module |
| IS220PAOCH1B | Analog Output Module |
| IS220PTCCH1A | Thermocouple Input Module |
| IS220PDIOH1B | Discrete Input/Output Module |
| IS220VPROH1B | Vibration and Speed Protection Module |
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