GE IS220PPROH1A Backup Protection I/O Pack

Technical Specifications

Model: IS220PPROH1A

Part Number: IS220PPROH1A，336A4940CSP19

Brand: GE（GE Vernova）

Product Type: PPRO backup turbine protection I/O pack

Matching System: GE Speedtronic Mark VIe distributed turbine control system

Processor:32‑bit RISC processor, 16MB SDRAM, 32MB Flash memory

Power Supply:24VDC，operating range 22.5‑28.5VDC

Communication:Dual‑port 10/100Mbps IONet redundant Ethernet, IR service port

Speed Input:3‑channel independent keyphasor speed acquisition

Protection Logic:Hardware‑based independent overspeed trip function

Redundancy Mode:Support simplex, dual and TMR triple‑modular redundant configuration

Installation:Mark VIe rack plug‑in, hot‑swap supported

Operating Temperature:‑30℃ ~ +65℃, non‑condensing

Protection Class:IP20

Weight:0.38kg

Dimension:126mm ×60mm ×82mm

Compatible System:Gas‑steam turbine, generator combined‑cycle power plant control cabinet

Core Function: PPRO backup protection I/O pack for Mark VIe turbine control system. It realizes hardware‑independent overspeed protection function, independently collects turbine keyphasor speed signals, executes overspeed judgment and emergency trip logic without relying on main controller. Communicates with system through IONet redundant Ethernet, supports TMR triple‑modular redundant voting, provides secondary safety shutdown guarantee for turbo‑generator unit, avoids main controller failure causing protection failure risk.

Product Details

The IS220PPROH1A (336A4940CSP19) is PPRO series backup protection I/O pack for GE Speedtronic Mark VIe distributed turbine control system.

This hot‑swappable compact I/O pack adopts independent hardware protection circuit, does not depend on main controller software algorithm. Three‑channel speed input collects turbine shaft speed signal in real‑time, once speed exceeds protection threshold, hardware fast trip output will be triggered directly to realize unit emergency shutdown. Dual‑port IONet redundant Ethernet realizes data interaction with control system, uploads operating status and fault alarm information. IR infrared service port facilitates local debugging and parameter configuration.

On‑board multi‑group LED status indicators, convenient for field maintenance and fault quick positioning. Conformal coated circuit board improves anti‑vibration and anti‑electromagnetic‑interference performance, adapts to harsh environment of power‑plant turbine hall, meets power generation safety certification requirements.

It belongs to safety‑class core spare‑part for Mark VIe turbine control system, widely used in overhaul and renovation projects of gas‑steam turbine generating units.

It is important spare hardware for turbine protection system debugging and defective IS220PPROH1A pack replacement.