• • • • • • • • • • • • • • • • • • • • • • GE IS220PPROH1A Protection I/O Module

                                            Overview

                                            IS220PPROH1A is a backup turbine protection I/O pack for GE Speedtronic Mark VIe turbine control platform, also named PPRO module. It delivers independent secondary safety protection separate from the main turbine controller, supporting simplex and triple modular redundant (TMR) architecture for gas & steam turbine units. The suffix H1 stands for conformal coated PCB for dusty/humid cabinet environments, revision A represents standard factory hardware version.

                                            

                                            IS220PPROH1A Front Panel

                                            

                                            Module Rear Connectors

                                             

                                            Specifications

                                            • Power supply: 24 VDC nominal input
                                            • Communication: Dual independent 10/100 Mbps SRTP Ethernet ports for redundant network transmission
                                            • Local interfaces: Front IR maintenance port, multi-status LED indicators (RUN, ESTP, OSPD, WDOG, SYNC, PWR, LINK)
                                            • Built-in hardware watchdog timer, temperature monitoring sensor and auto-reset circuit
                                            • Operating temperature: -20°C ~ +70°C for industrial control cabinets
                                            • Single-slot rack-mounted design, hot-swappable with full self-diagnosis logic
                                            • High-speed on-board processor for real-time trip signal calculation and fault judgment

                                            Key Functions

                                            1. Independent backup overspeed protection
                                                
                                               Monitors turbine speed signals and triggers emergency shutdown independently if the main control fails, avoiding rotor over-speed damage.
                                            2. Emergency stop (E-Stop) loop supervision
                                                
                                               Continuously detects wire breaks and circuit abnormalities on hardwired safety trip loops, instant trip response once fault is detected.
                                            3. Generator synchronization backup verification
                                                
                                               Cross-checks voltage, frequency and phase difference during grid paralleling to prevent unsafe synchronization faults.
                                            4. Independent watchdog for main controller
                                                
                                               Constantly communicates with primary turbine CPU; cuts off fuel supply if main control loses communication.
                                            5. Trip signal acquisition & fault logging
                                                
                                               Collects all protection trip feedback signals, records time-stamped fault events and transmits data to HMI/SCADA via Ethernet.
                                            6. TMR redundant compatible
                                                
                                               Three IS220PPROH1A modules can form a 2-out-of-3 voting TMR protection system to eliminate single-point failure risks.

                                            Compatible Equipment

                                            • Mark VIe control rack, TPROH / SPRO series terminal trip boards
                                            • IS200SPROH simplex protection terminal boards, IS200TPROH TMR trip boards
                                            • Mark VIe main control CPU modules, turbine speed sensors and E-Stop hardwiring circuits
                                            • ToolboxST engineering configuration software, plant DCS and operator HMI workstations

                                            Applications

                                            Safety-critical power generation equipment:

                                            • Gas turbine and steam turbine units in thermal power plants
                                            • Combined cycle power station main turbine protection systems
                                            • Oil & gas on-site power generation turbine control cubicles
                                            • Industrial large steam turbine generator sets
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The structure and details of the product：