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P127

The Alstom P127 is a high-reliability power supply unit designed for railway signaling and trackside equipment. It provides stable, regulated power to vital signaling systems, ensuring uninterrupted operation in demanding rail environments.

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Key Features
1. Robust Power Delivery
Input: 110V/220V AC or 24V/48V/110V DC (configurable)

Output: 24V DC (adjustable) with high efficiency (>92%)

Redundant power modules for fault tolerance

2. Safety & Compliance
EN 50155 (Railway Electronic Equipment)

SIL2/SIL3 certified (depending on application)

Overvoltage, overcurrent, and short-circuit protection

3. Environmental Resilience
Operating temperature: -40°C to +70°C

Vibration & shock resistant (EN 61373)

IP54-rated enclosure (dust & splash protection)

4. Smart Monitoring & Diagnostics
LED status indicators (power, fault, load)

Remote monitoring via Ethernet/RS-485

Predictive maintenance support

Technical Specifications
Parameter Specification
Model P127
Input Voltage 85V–264V AC / 18V–36V DC
Output Voltage 24V DC (±1% regulation)
Output Current Up to 20A (configurable)
Efficiency ≥92% (full load)
Protections Overload, overvoltage, reverse polarity
Certifications EN 50155, EN 50121, CE, UL
Applications
✔ Trackside signaling systems
✔ Interlocking & relay control
✔ Level crossing power supply
✔ ERTMS/ETCS equipment

Benefits
✅ High Reliability – Redundant design for continuous operation
✅ Energy Efficient – Low power loss with high-efficiency conversion
✅ Easy Integration – Compatible with Alstom SmartLock® & Iconis®
✅ Low Maintenance – Long lifecycle with minimal servicing