The Alstom SPU232 is a high-reliability Signal Processing Unit designed for railway signaling and train control systems. As part of Alstom’s advanced ERTMS/ETCS (European Rail Traffic Management System / European Train Control System) solutions, the SPU232 ensures safe and efficient rail operations by processing vital signaling data and interfacing with trackside and onboard systems.
Movement Authority calculation (ERTMS/ETCS compliant)
Interface with RBCs, interlockings, and LEUs
✔ Cyber-Resilient Design
IEC 62443-3-3 compliant security
Secure boot with cryptographic authentication
✔ Deployment Flexibility
Modular design for trackside/onside mounting
-40°C to +70°C operational range (EN 50155)
Technical Specifications
Parameter Specification
Safety Standard EN 50126/8/9 SIL4
Input Voltage 24V DC ±20% (redundant supply)
Communication Ethernet (ERTMS), RS-422, CAN
MTBF >1 million hours
Weight 3.2 kg (ruggedized housing)
Applications
Trackside: Interlocking systems, axle counter processing
Onboard: ETCS onboard units (EUROBALISE interface)