Description
IS220UCSAH1A Product Overview
The IS220UCSAH1A is a fanless, high-performance Processor / Acoustic Monitor Module (PAMC) used inside GE Mark VIe distributed control cabinets. It combines a 667 MHz Freescale PowerPC 8349 CPU, 256 MB DDR SDRAM, and 1 GB CompactFlash to execute turbine protection, acoustic monitoring, and fast closed-loop control algorithms under the QNX Neutrino real-time operating system.
The IS220UCSAH1A is a fanless, high-performance Processor / Acoustic Monitor Module (PAMC) used inside GE Mark VIe distributed control cabinets. It combines a 667 MHz Freescale PowerPC 8349 CPU, 256 MB DDR SDRAM, and 1 GB CompactFlash to execute turbine protection, acoustic monitoring, and fast closed-loop control algorithms under the QNX Neutrino real-time operating system.
In the automation hierarchy the module sits at the “primary controller” layer: it runs the turbine application, exchanges high-speed data with I/O packs over the dedicated IONet (IEEE 1588-synchronised Ethernet), and publishes plant data via dual Gig-E ports that support Modbus TCP, PROFINET, and IEC 61850. Triple redundancy is achieved by installing up to three IS220UCSAH1A units in a single Mark VIe chassis; the modules synchronise state data over the backplane and vote outputs before commanding field devices.
Because the card is certified for Zone 2 hazardous locations and operates from 18–36 VDC without a fan, it is accepted in compressor stations, off-shore platforms, and combined-cycle plants without additional HVAC.
GE IS220UCSAH1A
Technical Specifications
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Model Number: IS220UCSAH1A
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Manufacturer: General Electric
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Product Type: Processor / Acoustic Monitor Module (PAMC)
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Processor: Freescale PowerPC 8349, 667 MHz
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Memory: 256 MB DDR SDRAM, 1 GB CompactFlash
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Operating System: QNX Neutrino real-time multitasking
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Power Supply: 18–36 VDC, 12 W max
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Temperature: –40 … +70 °C operational; –40 … +85 °C storage
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Ethernet: 6 × 10/100/1000 Mb (RJ45 + SFP options), plus dedicated IONet for I/O packs
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Serial: RS-232 & RS-485 (Modbus RTU)
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Protocols: Modbus TCP, PROFINET, IEC 61850, SNTP, IONet
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I/O Capacity: Voted via IONet—supports full Mark VIe I/O suite (IS200/IS220 packs)
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Isolation: 1500 V I/O-to-logic; 2500 V port-to-port
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Cooling: Fanless passive, conduction-cooled plate
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Certifications: NFPA Class I Div. 2, Zone 2, IP20 base (IP67 optional)
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Weight: ≈ 2 kg
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Dimensions: 300 × 250 × 100 mm (approx.)
Core Features & Customer Value
667 MHz PowerPC + QNX RTOS – Delivers micro-second interrupt response and millisecond-level turbine control loops without the jitter of Windows-based controllers
667 MHz PowerPC + QNX RTOS – Delivers micro-second interrupt response and millisecond-level turbine control loops without the jitter of Windows-based controllers
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Triple-redundant native – Up to three PAMCs vote outputs over the backplane; <50 ms failover keeps gas or steam turbines on-line during a CPU fault .
IONet + 6 Gig-E ports – Dedicated IEEE-1588-synchronised IONet isolates I/O traffic from plant networks, while dual Gig-E provides redundant Modbus TCP or PROFINET to the DCS .
Fanless & wide-temp – Conduction-cooled plate operates from –40 °C to +70 °C without a fan, eliminating the most common failure mode in turbine skids and off-shore platforms .
Zone-2 certified – NFPA Class I Div. 2 and ATEX Zone 2 approval allows direct installation in hazardous-location panels without additional purge or pressurisation systems
GE IS220UCSAH1A
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Typical Applications
In combined-cycle power plants the IS220UCSAH1A is installed as the primary (and voted redundant) PAMC in Mark VIe racks that govern gas-turbine fuel valves, inlet-guide-vane actuators, and acoustic combustion monitors. The 667 MHz CPU executes the speed-control PID and fast protection logic while publishing real-time data to the plant DCS over redundant Gig-E.
In combined-cycle power plants the IS220UCSAH1A is installed as the primary (and voted redundant) PAMC in Mark VIe racks that govern gas-turbine fuel valves, inlet-guide-vane actuators, and acoustic combustion monitors. The 667 MHz CPU executes the speed-control PID and fast protection logic while publishing real-time data to the plant DCS over redundant Gig-E.
In pipeline compressor stations the same module runs anti-surge algorithms and communicates with remote I/O packs over IONet, ensuring surge-free operation even during rapid transients.
Because the module is certified for marine environments, it is also used on off-shore platforms for well-head control and engine governors where a fan-less, Zone-2 controller is mandatory.
