Description
Overview
The IS420UCSDS1 UCSB Controller Module is a dedicated safety‑class computing unit developed by General Electric for the Mark VIe control platform. Designed for turbine, excitation, and drive‑system applications, this module provides deterministic execution of safety logic while maintaining full independence from standard control processors. Its modular construction and rugged electronics make it suitable for both hazardous and non‑hazardous industrial installations.
Functional Characteristics
At the core of the IS420UCSDS1 is a 600 MHz Intel EP80579 processor optimized for embedded control. The controller operates as a standalone computer, executing safety logic locally while accessing distributed I/O data across the network. This architecture eliminates reliance on local I/O cards and significantly reduces single‑point‑of‑failure risks.
The module supports a DC input range of 18–30 V, with nominal operation at 24 V or 28 V DC. A maximum current draw of 1.5 A ensures efficient power utilization. Its conformal‑coated PCB enhances resistance to moisture, dust, and corrosive atmospheres, extending service life in demanding turbine environments.
Safety and Compliance
The IS420UCSDS1 carries multiple industrial safety approvals, including:
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UL DEMKO 12 ATEX 1114875X (ATEX Zone 2, Group IIC)
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UL E207685 (Class I, Division 2 hazardous locations)
These certifications confirm suitability for environments where explosive gases or vapors may be present.
Communication and System Integration
The controller includes five communication interfaces, supporting:
This network‑centric design ensures continuous access to I/O data even when individual controllers are powered down for maintenance. The module’s naming convention reflects its UCSD functionality, conformal coating, and modular assembly.
Mechanical and Environmental Details
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Dimensions: 5.5 × 12.3 × 20.3 cm
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Weight: 1.52 kg
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Operating voltage: 18–30 V DC
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Nominal current: 1.5 A
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Designed for turbine‑grade vibration and temperature conditions
Performance and System Role
The IS420UCSDS1 is engineered for high‑availability control systems where redundancy and deterministic behavior are essential. Its independent computing architecture allows safety logic to continue running even when other controllers are offline, making it ideal for mission‑critical turbine and DCS applications.
Applications
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Mark VIe safety and control systems
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Gas and steam turbine protection
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LS2100e and EX2100e excitation systems
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Distributed control systems requiring redundant safety processors
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Hazardous‑location industrial automation
Technical Specifications Table
| Parameter |
Specification |
| Model |
IS420UCSDS1 |
| Product Type |
UCSB Controller Module |
| Series |
Mark VIe |
| Processor |
600 MHz Intel EP80579 |
| Input Voltage |
18–30 V DC |
| Nominal Voltage |
24 V / 28 V DC |
| Max Current |
1.5 A |
| Communication Ports |
RS‑232C, Ethernet |
| PCB Protection |
Conformal coating |
| Dimensions |
5.5 × 12.3 × 20.3 cm |
| Weight |
1.52 kg |
| Certifications |
ATEX Zone 2, UL Class I Div 2 |
| Origin |
USA |
| System |
DCS |
| Status |
Active |
FAQ
Q: Does the controller host local I/O? A: No. All I/O is accessed through networked I/O packs, reducing hardware complexity and improving redundancy.
Q: Can this module operate in hazardous environments? A: Yes. It is certified for ATEX Zone 2 and Class I, Division 2 locations.
Q: Is the controller hot‑swappable? A: The architecture allows maintenance on one controller without interrupting system‑wide I/O availability.
