IS220PTURH1A GE

Model: IS220PTURH1A
Manufacturer: GE (General Electric)
Core Function: Serves as a primary turbine-specific trip I/O pack, interfacing critical protection sensors (speed, flame, and contact inputs) to execute fast turbine trips while providing electrical isolation and diagnostics for safety-critical functions.
System Compatibility: Compatible with Mark VIe and Mark VIeS control systems in simplex, duplex, or TMR (Triple Modular Redundancy) configurations.
Supply Status: In Stock for immediate global shipment.
Warranty Standard: 12-month functional warranty, fully tested.

Key Technical Specifications

Product Model: IS220PTURH1A
Manufacturer: GE
System Platform: Mark VIe Turbine Control System
Power Supply Voltage: 24-28 V DC nominal, operating range typically 18-32 V DC for robust performance in turbine environments.
Power Consumption: Approximately 5-7 W under normal load, supporting efficient rack integration.
Communication Interfaces: Dual 100 Mbps full-duplex Ethernet ports for IONet connectivity, enabling redundant high-speed data exchange with controllers.
Speed Sensor Inputs: 4 channels for passive or active magnetic speed pickups, supporting overspeed protection with high-frequency counting.
Flame Sensor Inputs: 8 channels for flame detection (typically ultraviolet or infrared sensors), critical for combustion stability monitoring.
Contact Inputs: Multiple discrete inputs for emergency trip signals, permissive logic, and status feedback.
Trip Outputs: Configurable relay or solid-state outputs for initiating turbine shutdown sequences.
Operating Temperature Range: -30°C to +65°C, designed for harsh turbine hall and enclosure conditions.
Humidity Tolerance: 5% to 95% non-condensing, with conformal coating for corrosion resistance.
Dimensions: Compact I/O pack form factor approximately 8.26 cm × 4.19 cm × 12.1 cm (height × width × depth).
Weight: Approximately 0.5 kg, allowing easy field replacement.
Certification Standards: CE compliant, UL listed, meets IEC 61131-2 for industrial controllers and hazardous location requirements where applicable (e.g., ATEX via associated terminal boards).
MTBF (Mean Time Between Failures): Exceeds 250,000 hours per GE modeling, minimizing unplanned maintenance in critical protection paths.
Isolation Voltage: 1500 V AC between I/O channels, power, and Ethernet interfaces, protecting against electrical noise and ground potential differences.

Technical Architecture & Functional Positioning

The IS220PTURH1A functions at the protection layer of the Mark VIe architecture, acting as a dedicated primary trip interface that aggregates high-priority safety signals from turbine sensors and executes rapid shutdown commands when thresholds are exceeded. Mounted on compatible terminal boards (such as IS200TRPAH series), it digitizes inputs from speed probes and flame detectors, performs local logic for overspeed, loss-of-flame, and other trip conditions, and communicates status and trip requests over the deterministic IONet to the controller for coordinated action. This positioning ensures sub-millisecond response times for protection functions, independent of main control loops, which is essential for safeguarding rotating equipment against catastrophic failures.

Core technologies include high-speed counters for precise speed measurement (supporting up to 20,000 RPM or higher with appropriate scaling), flame input conditioning with adjustable thresholds, and embedded diagnostics that monitor sensor health, wiring integrity, and internal faults. These features solve key engineering problems in gas turbine operation, such as preventing rotor overspeed during load rejection or detecting flameout to avoid unburned fuel accumulation. In TMR configurations, multiple packs provide 2-out-of-3 voting for enhanced SIL (Safety Integrity Level) compliance, reducing spurious trips while maintaining high availability.

The pack’s processor board incorporates flash memory, RAM, and a read-only identification chip, allowing seamless integration and firmware updates via ToolboxST. Its design prioritizes fail-safe operation, with watchdog timers and self-test routines that force trips on detected anomalies, aligning with turbine OEM safety standards.