1. General Description

The UCSB Compact Independent Controller Module is a high-performance, space-efficient controller for GE Mark VIe systems.
It independently executes control logic and exchanges all application I/O data via the IONet industrial Ethernet network, enabling reliable real-time control without onboard application I/O channels.

This version (IS420UCSBH4A) is optimized for higher computational performance, supporting more complex control algorithms and advanced data processing while maintaining fanless, industrial-grade reliability.

2. Processor and Operating System

Processor: Intel® EP80579 microprocessor

Clock speed: 1066 MHz

Operating system: QNX® Neutrino real-time operating system

Deterministic real-time scheduling for mission-critical industrial control

3. Memory Configuration

System memory: 256 MB DDR2 ECC SDRAM

Non-volatile storage: 2 GB NAND Flash

ECC memory ensures data integrity and long-term operational stability

4. Communication Interfaces

Integrated IONet industrial Ethernet interface

Supports industrial communication protocols including:

Modbus TCP/IP

Other Mark VIe-supported Ethernet protocols

High-speed, deterministic communication with distributed I/O and higher-level systems

5. Power and Electrical Specifications

Supply voltage: 18–30 VDC

Nominal: 24 / 28 VDC

Power consumption:

Rated: 15.6 W

Peak: 26.7 W

6. Environmental Specifications

Operating temperature: −40 ℃ to +70 ℃

Storage temperature: −40 ℃ to +85 ℃

Suitable for harsh industrial and power-generation environments

7. Mechanical Specifications

Dimensions: approx. 120 mm × 60 mm × 40 mm

Weight: approx. 0.6 kg

Protection class: IP20 (cabinet installation)

Cooling method: Fanless natural convection

8. Redundancy and Maintainability

Supports:

Simplex

Dual

TMR (Triple Modular Redundancy) architectures

No onboard application I/O:

All I/O data acquired via IONet, ensuring no application input loss during single-controller power-off maintenance

Supports:

Hot plugging

Online firmware updates

Designed for high availability and reduced maintenance downtime

9. System Integration

Communicates with Mark VIe I/O modules such as:

PUAA

UCVH

Other IONet-based I/O modules

Fully compatible with Mark VIe distributed control architectures

10. Certifications and Standards

Industrial certifications including:

CE

UL

IEC 61131

Other applicable industrial standards

11. Comparison with IS420UCSBH1A
Comparison Item IS420UCSBH4A IS420UCSBH1A
Processor Intel EP80579 Intel EP80579
Clock Speed 1066 MHz 600 MHz
Performance Positioning High-performance model Standard performance model
Memory 256 MB DDR2 ECC + 2 GB NAND 256 MB DDR2 ECC + 2 GB NAND
Control Capability Suitable for complex logic and higher computational load Suitable for conventional control logic
Typical Applications Small/medium units with advanced algorithms and higher data throughput Conventional small/medium unit control and distributed stations
12. Core Functions

Independent execution of control logic

Distributed I/O acquisition via IONet

Support for redundant architectures

Online maintenance without control interruption

Deterministic real-time performance for industrial control

13. Typical Applications

GE Mark VIe control systems for:

Gas turbines

Steam turbines

Compressors

Generators

Main control and auxiliary control systems

Distributed control station construction for small and medium-sized units

Installations with:

Limited cabinet space

Fanless, low-maintenance design requirements

14. Key Advantages

High-performance processor:

Handles more complex control algorithms and real-time data analysis

Fanless design:

Eliminates mechanical failure points

Improves long-term system reliability

Integrated power design:

No external batteries or jumper settings required

Simplifies installation and maintenance

GE IS420UCSBH4A｜Mark VIe Controller｜