Description
Product Specifications
- Origin: United States (USA)
- Weight: 1.40 lbs (0.64 kg)
- Dimensions: 8.26 x 1.78 x 4.72 inches
- Redundancy: Supports Triple Modular Redundant (TMR) architecture for safety-critical trips.
- Input Channels: 3 speed inputs (magnetic pickup or active), 12 logic inputs (contact inputs), and 9 thermocouple inputs.
- Network: Dual 10/100 Mbps Ethernet ports (IONet) for fault-tolerant communication.
- Certification: SIL 2/3 capable when used in approved configurations.
The GE IS220PPROH1A is a high-integrity Turbine Protection I/O Pack designed for the Mark VIe control system to manage emergency shutdown and overspeed protection. This module serves as a localized intelligence center, digitizing critical safety signals directly at the terminal board to minimize signal latency. It is specifically engineered to handle high-speed pulse inputs for turbine shaft speed monitoring and hard-wired emergency trip strings. By utilizing dual IONet ports, the PPRO provides a robust communication bridge to the controllers, ensuring that protection logic remains active even during a localized network failure, making it indispensable for the safe operation of large-scale gas and steam turbines.
GE IS220PPROH1A
GE IS220PPROH1A
GE IS220PPROH1A
Model Comparison: IS220PPROH1A vs. Similar Models
The IS220PPROH1A is the primary safety pack in the Mark VIe family, distinguishing itself from the IS220PAIC and IS220PDIA by its specialized hardware for frequency-based speed sensing. While standard digital packs (PDIA) handle general-purpose status signals, the PPRO includes dedicated high-speed counters and voting logic specifically for overspeed detection. Compared to the older IS200 rack-based protection modules, the PPRO “H1A” revision offers a significantly smaller footprint and improved diagnostic granularity, allowing the system to distinguish between a field sensor failure and an actual turbine overspeed event.
Operational Guidelines
- TMR Configuration: In a Triple Modular Redundant system, ensure three PPRO packs are installed across the <R>, <S>, and <T> cores to maintain the 2-out-of-3 (2oo3) voting integrity.
- Speed Sensor Wiring: Use high-quality shielded twisted-pair cabling for magnetic pickup inputs to prevent electromagnetic interference from triggering nuisance trips.
- Jackscrew Security: When mounting to the SPRO terminal board, tighten the side jackscrews to the specified torque to ensure the internal connectors and ground paths are fully engaged.
- LED Status Checks: Monitor the “ATTN” (Attention) LED; a solid amber light indicates the pack is in a “Not Ready” state, typically due to a firmware mismatch or a failure to synchronize with the IONet master.
