- Model: IS220UCSAH1AK
- Manufacturer: GE
- Core Function: Provides standalone embedded processing and control execution for turbine applications, running deterministic logic, coordinating distributed I/O via IONet, and supporting high-integrity monitoring and safety functions in Mark VIe/Mark VIeS systems.
- System Compatibility: Compatible with GE Mark VIe and Mark VIeS distributed control systems, including Speedtronic turbine platforms and Mark VIeS safety configurations.
- Supply Status: Available as new surplus, refurbished, or repair/exchange; supported for ongoing lifecycle in turbine installations.
- Warranty Standard: 12-month functional warranty, fully tested.
Key Technical Specifications
- Product Model: IS220UCSAH1AK
- Manufacturer: GE
- System Platform: Mark VIe
- Power Supply Voltage: 18 V DC to 32 V DC nominal (typically 24 V DC), with wide tolerance for stable operation under varying field conditions.
- Power Consumption: Approximately 10-15 W (up to 12 W typical), minimizing thermal load in control enclosures.
- Communication Interfaces: Dual 10/100 Mbps Ethernet ports (RJ45) for redundant IONet connectivity, enabling fault-tolerant data exchange with I/O packs and supervisory systems.
- Processor Type: Freescale PowerQUICC II Pro (8349 equivalent), single-core at 667 MHz, optimized for real-time deterministic control tasks.
- Memory: 256 MB DDR SDRAM, supporting application code, data processing, and diagnostic buffering in turbine environments.
- Operating System: QNX Neutrino real-time OS, ensuring low-latency multitasking and high reliability for safety-critical applications.
- Operating Temperature Range: -30°C to +65°C (some sources indicate 0°C to 65°C), suited for industrial turbine hall conditions.
- Humidity Tolerance: 5% to 95% non-condensing, maintaining performance in humid or variable ambient environments.
- Dimensions: Compact Mark VIe pack format, approximately 8-10 cm wide x 4-5 cm high, designed for mounting in UCSA-compatible bases or enclosures.
- Weight: Approximately 0.5-1.0 kg, allowing straightforward field handling and replacement.
- Mean Time Between Failures (MTBF): >100,000 hours (typical for Mark VIe controller modules), promoting high system availability.
- Certification Standards: CE compliant, UL 508 listed for industrial control equipment, RoHS directive adherence.
Technical Architecture & Functional Positioning
The IS220UCSAH1AK serves as an embedded standalone controller in the Mark VIe architecture, positioned to execute core application software for turbine sequencing, regulation, protection, and safety monitoring. It integrates processing with IONet communication to manage distributed I/O packs, supporting simplex, duplex, or TMR redundancy configurations. This variant often aligns with Mark VIeS safety series requirements, incorporating features for high-integrity control where fail-safe operation is paramount.
Built around a PowerQUICC II Pro processor with QNX Neutrino RTOS, the module delivers precise timing for control loops, event handling, and diagnostic functions. It includes onboard resources for memory management, health monitoring, and communication redundancy, with capability for specialized processing in turbine applications. These elements address engineering priorities: deterministic response to critical events like overspeed or overtemperature, robust operation in EMI-heavy environments, and seamless integration in safety-rated systems.
The architecture supports ToolboxST configuration tools, firmware updates, and comprehensive fault reporting, facilitating predictive maintenance and compliance with turbine safety standards.
Typical Application Scenarios
- Applied in heavy-duty gas turbines for primary control of startup, load regulation, and protective tripping with safety integrity.
- Used in steam turbine systems for governor functions, synchronization, and high-reliability balance-of-plant coordination.
- Serves as a replacement or upgrade processor in Mark VIe/Mark VIeS fleets, compatible with mixed configurations for extended lifecycle support.
- Supports combined-cycle plants requiring coordinated, fail-safe control across gas/steam turbines and auxiliary systems.
- Utilized in power generation facilities emphasizing safety instrumented functions for overspeed, overtemperature, and emergency shutdown logic.
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