GE IS420UCSBH1A UCSB Unified Control System Base Controller for Mark VIe Turbine Control Platform

GE IS420UCSBH1A is a fanless, battery-free high-performance standalone CPU controller belonging to GE UCS series, specially developed for GE Mark VIe / Mark VIeS triple modular 

redundant turbine safety control system, also compatible with EX2100e generator excitation regulation system and LS2100e static starter control system.

As the core logic operation unit, it executes turbine speed regulation, load control, sequence interlock logic, emergency shutdown protection, fault diagnosis and closed-loop algorithm calculation. 

It communicates with distributed I/O packs via deterministic IONet industrial Ethernet, realizes high-speed real-time collection of field analog/digital signals and output of valve control commands.

 It supports IEEE 1588 high-precision clock synchronization to guarantee microsecond-level synchronous operation for three redundant control lanes in TMR architecture, effectively 

avoiding single-point failure risks of critical power generation equipment. Adopting solid-state passive heat dissipation design without moving parts, it features strong anti-vibration and 

anti-electromagnetic interference capability, and serves as core maintenance spare part for overhaul, fault replacement and system upgrade of combined-cycle power plant, gas/steam turbine

 control cabinets worldwide.

Technical Specifications

Part Number: IS420UCSBH1A

Manufacturer: General Electric (GE), Origin: USA

Model Definition: UCSB (Unified Control System Base) Controller

Processor: Intel EP80579 600MHz embedded industrial processor

System Memory: 256MB ECC DDR2 error-correcting RAM

Onboard Storage: 2GB NAND Flash for firmware, control logic and event log storage

Operating System: QNX Neutrino real-time deterministic operating system

Communication Interfaces

Multiple IONet dedicated Ethernet ports for redundant distributed I/O communication

Service Ethernet port for ToolboxST/ControlST programming commissioning

Serial debugging port for local maintenance diagnosis

Synchronization Mode: IEEE 1588 precision time synchronization protocol

Power Supply: 18–30VDC (nominal 24VDC/28VDC), typical power consumption 15.6W, peak 26.7W

Installation Form: Standard Mark VIe rack plug-in module, wall/rack mounting structure

Cooling Design: Passive heat sink cooling, no built-in fan, no backup battery

Operating Temperature: -30℃ ~ +65℃

Storage Temperature: -40℃ ~ +85℃

Ambient Humidity: 5%–95% Non-Condensing

Protection Class: IP20 (Cabinet internal installation)

Safety Certification: UL E207685, ATEX Zone 2 Group IIC hazardous area certification

Net Weight: Approx. 1.1kg

Commissioning Software: ToolboxST, ControlST configuration & programming platform

Key Features

Fanless & batteryless solid-state architecture, eliminating mechanical failure points, improving long-term operational stability in turbine hall harsh environment.

ECC error correction memory design, automatically detecting and correcting internal data bit errors to prevent logic operation abnormality caused by electromagnetic interference.

Deterministic IONet bus communication, ultra-low latency data interaction with distributed I/O modules, meeting fast response requirement of turbine protection interlock.

IEEE 1588 high-precision clock synchronization, ensuring synchronous operation of three TMR redundant control channels for safety-critical control logic.

Complete onboard fault self-diagnosis function, front panel LED status indicators for rapid judgment of running, communication, power supply and hardware fault status.

Support master-standby redundancy and triple modular redundant deployment, automatic seamless switchover to avoid unit trip caused by single controller failure.

Unified software platform compatible with UCSC, UCSA series controllers, consistent programming logic, convenient system expansion and spare part interchange management.

ATEX Zone 2 explosion-proof certification, applicable for installation in hazardous areas of petrochemical, offshore platform gas turbine units.