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EP3-E-4-A EPICIII

The Alstom EP3-E-4-A EPIC III represents the latest generation of microprocessor-based electronic interlocking systems, delivering SIL4-certified safety and operational flexibility for modern railway networks. As part of the renowned EPIC (Electronic PIoneer Interlocking Computer) family, this system sets the benchmark for reliability in critical signaling applications.

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Core Technologies
Triple Modular Redundancy (TMR) Architecture

Three independent processing channels with voting logic

Continuous cross-comparison for fault detection

Automatic switchover to standby units (<100ms)

Advanced Safety Features

CENELEC SIL4 certification (EN 50126/8/9)

Cryptographic message authentication (EN 50159)

Dual redundant vital power supplies

Network-Centric Design

Distributed object controllers (DOCs) for field elements

10Gbps fiber optic backbone

Cyber-secure communication (IEC 62443 compliant)

Technical Specifications
Category EP3-E-4-A Specifications
Processing Capacity Up to 1,024 field elements
Response Time <500ms for route setting
Availability 99.9999% (with redundancy)
Operating Temp. -40°C to +70°C
Maintenance Interface Web-based HMI with role-based access
Cybersecurity TÜV-certified secure boot
Deployment Advantages
Scalability: From single stations to complex junctions

Migration Path: Backward compatible with legacy EPIC systems

Remote Diagnostics: Predictive maintenance algorithms

ERTMS Integration: Native support for ETCS Level 2/3

Typical Applications
High-speed rail junctions

Metro CBTC environments

Freight corridor control points

Mixed-traffic nodal stations

Certifications & Compliance
EU: EN 5012x series

UK: RIS-0700 series

Asia: IRS 02200 standards

SIL4 across all vital functions

Documentation Package Includes:

EPIC III System Engineering Manual (SEM-EP3-EN)

Cybersecurity Implementation Guide

Migration Toolkit for legacy EPIC systems