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.
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