IS420UCSCS2A 2 IS420UCSCS2A 4 IS420UCSCS2A 3

The GE IS420UCSCS2A is a high-integrity Functional Safety Controller Module engineered by General Electric (GE) for Mark VIeS safety control systems. Designed specifically for Safety Instrumented Systems (SIS), this controller executes safety-critical logic with deterministic precision, ensuring protection of assets, personnel, and processes.

With a dual-core architecture and SIL-certified design, the IS420UCSCS2A provides reliable, real-time control for demanding applications such as turbine protection, emergency shutdown systems, and high-risk industrial automation. Its network-based I/O architecture and redundancy support make it a cornerstone for modern safety-focused control systems.

Technical Specifications

Specification	Details
Brand	GE (General Electric)
Model	IS420UCSCS2A
Module Type	Functional Safety Controller Module (UCSC)
System Compatibility	Mark VIeS Safety Control System
Processor	AMD G-Series Dual-Core @ 1.6 GHz
Memory	2 GB DDR3 SDRAM (ECC)
Storage	128 GB Solid-State Drive
Operating System	QNX Neutrino RTOS
Communication Interfaces	3 × IONet Ethernet, EGD/UDH Ethernet
Protocols	Modbus TCP (slave), Black Channel communication
Redundancy	Simplex, Dual, TMR supported
Power Supply	18–30 V DC (28 V nominal)
Power Consumption	Up to ~30.8 W
Operating Temperature	-40 °C to +70 °C
Mounting	Base / DIN-rail mount
Dimensions (L × W × H)	168 mm × 150 mm × 55 mm
Weight	1.33 kg
Safety Certification	SIL2 / SIL3 (IEC 61508 compliant)

Recommended Related Models

GE IS420UCSBS1A – Safety UCSB controller (SIL applications)
GE IS420UCSCH1C – Quad-core UCSC high-performance controller
GE IS420PPNGH1A – PROFINET gateway module
GE IS420ESWBH2A – Industrial Ethernet switch

These modules enable scalable, redundant, and safety-compliant GE control architectures.

Popular Allen Bradley Models

Allen-Bradley 1756-L81ES – Safety ControlLogix controller
Allen-Bradley 1756-EN2T – EtherNet/IP communication module
Allen-Bradley 1756-IB16S – Safety digital input module
Allen-Bradley 1783-ETAPND8 – Ethernet network adapter

These are widely used alternatives for safety and control in Rockwell Automation systems.

Applications

The GE IS420UCSCS2A is designed for safety-critical industrial environments:

Safety Instrumented Systems (SIS) with SIL2/SIL3 requirements
Gas and steam turbine protection systems
Emergency shutdown (ESD) systems
Power generation and combined-cycle plants
Oil & gas and petrochemical safety processes
High-availability distributed control systems

Its deterministic control ensures fast and reliable response in hazardous conditions.

Advantages

SIL-Certified Safety Performance: Fully compliant with IEC 61508 for SIL2/SIL3 applications
High-Speed Dual-Core Processing: 1.6 GHz CPU ensures rapid execution of safety logic
Advanced Redundancy Support: Simplex, dual, and TMR configurations enhance system availability
Deterministic Real-Time Operation: QNX RTOS guarantees predictable and stable control behavior
Network-Based I/O Architecture: IONet communication improves flexibility and reduces hardware dependency
Rugged Industrial Design: Wide temperature range and fanless cooling ensure long-term reliability

Technical FAQs

What is GE IS420UCSCS2A used for?
It is a functional safety controller used in Mark VIeS systems to execute SIL-rated safety logic.
What processor does it use?
A 1.6 GHz AMD G-Series dual-core processor.
What is the memory capacity?
2 GB DDR3 SDRAM with ECC protection.
What are the dimensions?
168 mm × 150 mm × 55 mm.
What is the weight?
Approximately 1.33 kg.
What communication interfaces are supported?
IONet Ethernet, EGD/UDH Ethernet, and Modbus TCP.
Does it support redundancy?
Yes — simplex, dual, and triple modular redundancy (TMR).
What operating system does it run?
QNX Neutrino real-time operating system.
What industries use this module?
Power generation, oil & gas, and safety-critical industrial automation.
Is it suitable for hazardous environments?
Yes — designed for industrial safety systems with high reliability and compliance.