GE IS420UCSBH3A

IS420UCSBH3A is a UCSB (Universal Control System Block) controller module belonging to GE’s Mark VIe series. As a standalone industrial computer, it is specifically designed to run control logic for large power equipment such as gas turbines and steam turbines, serving as the core computing unit of the entire Mark VIe control system.

Key Technical Specifications

• Processor: Intel EP80579, 1.2 GHz clock speed (quad-core)
• Operating System: QNX (Version 6.5/7.1)
• Memory/Storage: 1 GB RAM + 2 GB Flash (some sources indicate 2–4 GB RAM)
• Power Supply: 24/28 V DC (accepts 18–36 V DC), power consumption approximately 28.7 W peak / 17.3 W rated
• Communication Interfaces: 2× redundant Ethernet RJ45 ports, supporting IONet (GE’s proprietary protocol) and multi-protocol conversion
• Operating Temperature: 0 °C–65 °C (some sources mention -30 °C–65 °C, but actual use is limited to above 0 °C)
• Protection Class: IP67, compliant with SIL 2/3 functional safety requirements
• Physical Dimensions: Approximately H 6.4 in × W 8.1 in × D 1.4 in, weight about 2.9 lb (≈ 1.3 kg)
• Special Design: Fanless, battery-free, no jumper settings required, adopting natural convection cooling

Product Features

• High-Performance Computing: Equipped with a 1.2 GHz quad-core processor, enabling fast execution of complex control algorithms.
• Strong Reliability: Industrial-grade fanless design, redundant Ethernet, and IP67 protection make it suitable for harsh environments.
• Safety Compliance: Hold SIL 2/3 functional safety certification to meet the safety needs of critical process control.
• Simplified Installation: Modular and compact structure, no external batteries or cooling fans needed, reducing on-site wiring and maintenance workload.
• Good Compatibility: Software configuration is basically the same as other UCSB controllers in the Mark VIe series, facilitating system upgrades and replacements.

Structure and Composition

• CPU/Motherboard: Integrates EP80579 processor and DDR2/DDR3 memory slots.
• Power Supply Module: Built-in DC-DC converter, accepting 18–36 V input and providing stable 24/28 V output.
• Communication Board: Dual redundant Ethernet ports, supporting IONet and standard TCP/IP.
• I/O Interfaces: Provides terminal blocks for 28–16 AWG wire gauge, used to connect field instruments and actuators.
• Heat Dissipation Structure: Full aluminum heat sink and natural convection channels, no fans required.
• Enclosure: Metal housing, certified for ATEX Zone 2, Group IIC hazardous environments.

Main Application Fields

• Gas Turbine & Steam Turbine Control: Acts as the core control unit to realize closed-loop control of key parameters such as speed, temperature, and pressure.
• Power Plant Automation: Cooperates with GE’s Speedtronic system for real-time monitoring and protection of generator sets.
• Petrochemical & Chemical Process Control: Provides critical control functions for continuous production lines requiring high reliability and functional safety.
• Offshore Platforms & Extreme Environments: IP67 protection and ATEX certification make it suitable for offshore oil and gas platforms and other hazardous environments.

Installation and Maintenance Guidelines

• Installation Location: Must be fixed on Mark VIe dedicated control racks, ensuring the enclosure’s vents are not blocked to facilitate natural heat dissipation.
• Power Connection: Use power supplies complying with 28–36 V DC specifications, check that the power wire gauge meets 28–16 AWG standards to prevent voltage fluctuations.
• Network Wiring: Two redundant Ethernet cables should be connected to separate switches or routers to ensure automatic switching in case of network failure.
• Grounding & Lightning Protection: The enclosure must be reliably grounded, and matched with on-site lightning protection devices to prevent static electricity and electromagnetic interference.
• Software Upgrade: Perform firmware upgrades via QNX update packages provided by GE, preferably during system downtime windows to avoid operational impact.
• Regular Inspection: Check for dust accumulation on heat sinks and loose connection terminals every 6 months, and verify power supply voltage and network connectivity.
• Fault Diagnosis: Use diagnostic tools provided by GE (such as Mark VIe control stations) to read system logs and error codes for quick localization of hardware or software abnormalities.

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