I. Product Description
Full Model: IS415UCVGH1A, Hardware Material Code: V7666-111000
System Platform: GE Mark VIe Generator/Turbine Safety Control System, 6U Standard VME Bus Single Board Computer (SBC)
Safety Level: IEC 61508 SIL3, Supports Single / Dual / Triple TMR Redundancy Architecture, Core Computing Unit for Unit ESD Overspeed, Flame, Vibration Protection
Position: Rack Main Controller, Responsible for Logical Operations, I/O Scheduling, Network Communication, Fault Diagnosis
Core Hardware Configuration
Computing and Storage
CPU: Ultra-low Voltage Intel Celeron 650MHz Processor
Memory: 128MB SDRAM Built-in Run-Time Memory
Storage: CompactFlash Card Slot (Program, Configuration, Fault Log Storage, Maximum Expansion 1GB)
Operating System: Factory Pre-installed QNX Real-Time Operating System, Millisecond-level Control Scan Cycle
Interface Configuration
Front Panel External Ports
2 x 10/100Mbps Adaptive Ethernet (Redundant Dual Networks, Connecting HMI, Engineer Station, SCADA, Modbus TCP)
Debug Serial Port, USB Debug Port, VGA Display, PS2 Keyboard and Mouse Interface Backplane bus
VME64 high-speed backplane bus (bandwidth 160MB/s), compatible with the entire series of I/O, power supply, and expansion daughter cards of the IS200 series
Fiber optic synchronization interface: for high-speed data cross-comparison and voting between triple redundant controllers
PMC expansion slot: can be equipped with fiber optics, dedicated acquisition, and communication daughter cards for expansion functions
Electrical and mechanical parameters
Power supply: backplane + 5VDC ±5%
Form: 6U VME Eurocard, size 160×233×25mm
Operating temperature: standard -20℃ to +70℃; wide temperature type can reach -40℃ to +70℃
Protection: PCB three-proof coating, industrial EMC anti-interference, IP20 cabinet installation
Weight: approximately 0.6kg
Heat dissipation: large-area passive aluminum heat sink, no fan, maintenance-free design
Key Safety and Functional Features
TMR triple redundant fault-tolerant
Three identical IS415UCVGH1A chips operate in parallel, with hardware real-time voting output; single chip failure is automatically isolated, and the unit protection circuit is uninterrupted and error-free
Full-link hardware self-diagnosis
Real-time inspection of CPU, memory, network, VME backplane, I/O channels, power supply; fault codes, trip event logs are retained in local flash memory, and can be read by the upper computer for traceability
Hot-swappable maintenance
Under the redundant architecture, single chip can be replaced while the machine is powered on, without downtime for maintenance
Protocol compatibility
Ethernet: Modbus TCP, GE Mark VIe private security protocol, TCP/IP
Serial port: Modbus RTU, terminal debugging protocol
Backplane: VME high-speed safety bus
IV. Typical Application Scenarios
Main control for gas turbines / steam turbines (standard for GE 9FA, 6FA, LM series units)
Power plant boiler FSSS, turbine trip, excitation system safety control
Oil and gas booster station, compressor unit ESD emergency stop protection
Large combined cycle power station, thermal power generation complete set DCS safety control
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