GE IS420UCSBH1A Universal Controller Module

Technical Specifications

Model: IS420UCSBH1A

Brand: GE（GE Vernova）

Product Type: UCSB universal real‑time controller module

Matching System: GE Speedtronic Mark VIe / Mark VIeS turbine & excitation control system

Processor: 600 MHz Intel EP80579 processor

Memory: 256 MB DDR2 ECC SDRAM, 2 GB NAND Flash

Operating System: QNX Neutrino real‑time operating system

Power Supply: 18‑30 VDC, nominal 28VDC; nominal power 15.6W, peak 26.7W

Communication: Dual redundant 10/100Mbps IONet Ethernet ports, RS‑232 service debug port

Redundancy Mode: Support simplex, dual redundant and TMR triple‑modular redundant configuration

Indicator: Front‑panel multi‑LED for power status, network link, fault alarm

Mounting: Standard Mark VIe rack plug‑in controller module

Operating Temperature:‑40℃ ~ +70℃, non‑condensing

Humidity:5%‑95% non‑condensing

Protection Class:IP20, fan‑less aluminum heat dissipation

Weight:1.09kg

Dimension:150mm ×100mm ×50mm

Compatible System: Gas turbine, steam turbine, combined‑cycle generator and EX2100e excitation control cabinet

Core Function

UCSB universal controller module for Mark VIe distributed control system. It executes high‑speed real‑time control logic, sequence control, protection interlock and PID closed‑loop calculation for turbine units. Dual redundant IONet Ethernet communicates with field I/O packs to collect process signals and output control commands. Built‑in ECC memory improves data reliability, and on‑board self‑diagnostic function monitors hardware health and reports fault information to ToolboxST software. It supports simplex, dual and TMR triple‑modular redundant architecture, undertakes core control tasks of turbine speed regulation, load control and generator excitation adjustment, guarantees stable and safe operation of power plant units.

Product Details

IS420UCSBH1A belongs to UCSB series universal controller hardware for GE Speedtronic Mark VIe control system.

This fan‑less rack‑mount controller runs QNX real‑time operating system, adopts ECC error‑correcting memory to avoid data exception caused by industrial interference. Dual‑channel IONet Ethernet realizes deterministic real‑time communication with distributed I/O modules, supports IEEE1588 precise time synchronization. Flash memory stores system firmware, application logic and event log data. The front‑panel LED indicators intuitively display module running status, network link and fault codes, convenient for on‑site commissioning and daily troubleshooting. Conformal coated circuit board improves anti‑vibration, moisture‑proof and anti‑electromagnetic‑interference performance, adapts to harsh working environment of power‑plant turbine cabinet. Widely deployed in gas‑steam turbine, combined‑cycle unit and generator excitation control cabinets.

It belongs to core main‑controller spare‑part for Mark VIe control system, widely used in overhaul and renovation projects of power generation units.

It is important spare hardware for control logic debugging and defective IS420UCSBH1A module replacement.