IS420UCSCH1A | GE Electric Triple redundant safety controller
Product Description
The IS420UCSCH1A is a triple-redundant safety controller from GE’s Mark VIe Series, designed for critical turbine protection systems in power generation. It executes high-integrity safety logic (SIL3 certified) for gas/steam turbines, providing overspeed detection, flame monitoring, and emergency shutdown (ESD) functions to prevent catastrophic failures.
Product Parameters & Specifications (Table)
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Category
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Specification
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Model
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Manufacturer
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GE Power / GE Digital Energy
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Series
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Mark VIe Safety System (Speedtronic Turbine Control)
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Function
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Triple Modular Redundant (TMR) Safety Controller
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Safety Certification
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SIL3 (IEC 61508), TÜV-certified
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Processor
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Three independent 32-bit PowerPC RISC CPUs
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Memory
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128 MB SDRAM per channel
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I/O Interfaces
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Voltage Rating
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24V DC (±10%)
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Power Consumption
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25W max (typical)
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Operating Temp.
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-40°C to +70°C (-40°F to +158°F)
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Certifications
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UL 508, CE, cULus, DNV, IEC 61000-6 (EMC)
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Status
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Discontinued (Legacy system – see notes)
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Key Features
- TMR Architecture: Three parallel channels with 2-out-of-3 (2oo3) voting for fault tolerance.
- High-Speed Peer Sync: Optical TripleBus+ synchronization (<100ns skew).
- Secure Communications: Encrypted Ethernet SRTP protocol for controller-to-I/O networks.
- Hardware Watchdog: Automatic channel shutdown on fault detection.
- Hot-Swap Capable: Supports module replacement without turbine shutdown.
- Diagnostic LEDs: Per-channel status indicators for rapid troubleshooting.
Function & Purpose
Executes safety-critical control algorithms for turbine protection, including:
❶ Overspeed Detection (via magnetic pickups)
❷ Flame Supervision (UV/IR scanner integration)
❸ Vibration Trip Logic
❹ Lube Oil/Fuel System ESD
Ensures failsafe shutdown within milliseconds of hazard detection.
Applications
- Gas Turbine Protection: Emergency shutdown (ESD), combustor monitoring.
- Steam Turbine Safety: Overspeed protection, vacuum trip systems.
- Compressor Stations: Surge control and mechanical integrity monitoring.
- Hydroelectric Plants: Governor failure response.
Application Fields
- Power Generation (Combined-Cycle, Peaking Plants)
- Oil & Gas (Compressor Drives, Offshore Platforms)
- Petrochemical Processing
- District Heating/Cogeneration Facilities
- Marine Propulsion Systems
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