Description
- Product Model: IS215UCVEH2AF
- Manufacturer: GE
- System Platform: Mark VI Speedtronic
- Processor Type: Intel Celeron 300 MHz (embedded architecture)
- Memory: 32 MB DRAM primary, with battery-backed SRAM options in assembly
- Flash Storage: 16 MB base (expandable configurations available) for OS and application code
- Operating System: QNX real-time OS for deterministic task execution
- Ethernet Interface: 10BaseT/100BaseTX RJ-45 port for IONet, EGD, Modbus TCP, and HMI/SCADA connectivity
- Additional Interfaces: COM1 (RS-232C diagnostics), COM2 (Modbus/serial), keyboard/mouse support for maintenance
- Power Requirements: +5 V DC (6 A typical, 8 A max), +12 V DC (180 mA typical, 250 mA max), -12 V DC (180 mA typical, 250 mA max) from VME backplane
- Operating Temperature Range: -30°C to +65°C, suited for turbine enclosure conditions
- Humidity Tolerance: 5% to 95% non-condensing, conformal coating applied for protection
- Mounting Type: Single-slot VME (Versa Module Eurocard) rack installation
- Dimensions (approx.): Standard VME 6U form factor, approximately 160 mm x 233 mm
- Weight: Approximately 0.8-1.2 kg
- Certification Standards: CE compliant, UL recognized for industrial control, meets IEEE/ANSI turbine safety requirements
- Mean Time Between Failures (MTBF): >100,000 hours in continuous turbine duty
- Diagnostic Features: Front-panel LEDs for power, status, Ethernet link/activity, and fault indication
Technical Architecture & Functional Positioning
The IS215UCVEH2AF occupies the central control position in Mark VI systems, installed in a VME rack (13- or 21-slot) to run turbine application software while interfacing with I/O packs, protection modules, and external networks. It processes sensor data, executes governor/sequencer/protection logic, and coordinates TMR synchronization in redundant setups, delivering deterministic performance essential for turbine speed/load control and fault handling.
Built on a 300 MHz Intel Celeron with QNX RTOS, the board features high-speed Ethernet for IONet communication, flash-based storage for persistent applications, and robust power regulation from the backplane. These elements address critical needs: sub-millisecond loop times for overspeed/over-temperature protection, fault-tolerant redundancy to prevent single-point failures, and online diagnostics to support predictive maintenance in power plants.
The H2AF revision enhances compatibility with Mark VI configurations, supporting flexible I/O expansion and seamless upgrades. Its single-slot design optimizes rack space while enabling modular TMR implementations for high-availability operations.
Typical Application Scenarios
- Serves as the main controller in Mark VI gas turbines for startup sequencing, speed governing, and protective tripping during grid synchronization or load changes.
- Deployed in steam turbine Mark VI systems for valve control, extraction management, and coordinated shutdown in combined-cycle plants.
- Functions as a replacement/spare in existing Mark VI installations, maintaining application code and VME infrastructure compatibility.
- Integrated in industrial drives or compressor trains requiring precise real-time control under dynamic conditions.
- Utilized in retrofit/maintenance projects to refresh processing power in legacy Mark VI racks without major rewiring.
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