Railway Box PCs

Why Railway Computers Require Dedicated Certification

Rail environments place demands on computing hardware that general industrial standards do not fully address. Rolling stock generates continuous shock and vibration that can loosen connectors and damage components over time. Power input on rail vehicles operates at higher voltages than road vehicles — typically 24V, 72V, or 110V DC — and is subject to surges, interruptions, and transients that require dedicated protection circuitry. Operating temperatures on rail must remain stable from cold outdoor starts to hot enclosed compartments, often spanning -25°C to 70°C without active cooling.

EN50155 is the primary standard governing electronic equipment on railway rolling stock. It defines requirements across thermal conditioning, mechanical stress, humidity, electromagnetic compatibility, and power supply behavior. A railway PC that carries EN50155 certification has been tested against these conditions and validated for onboard rail use, which is a mandatory requirement for most rolling stock procurement projects in Europe and an increasingly common expectation in global rail programs.

Key Capabilities

• EN50155 Compliance and Rail Certification

  Systems are certified to EN50155 standards covering temperature resistance, shock and vibration, EMC, and power supply behavior for rolling stock applications. This certification supports procurement requirements for rail projects in European and international markets.

• Fanless Design with Wide-Range DC Input

  Passive fanless cooling eliminates moving parts in a continuous vibration environment. Wide-range DC input with surge and transient protection handles the variable power conditions found on rail vehicles, supporting stable operation across the full operating lifecycle.

• M12 Connectors for Vibration-Resistant Connectivity

  M12 industrial connectors replace standard ports to maintain reliable connections under constant mechanical stress. This reduces the risk of connector failure or signal interruption that standard I/O interfaces may experience in rail environments.

• NVR and Multi-Camera Support

  Platforms with NVR capability handle onboard video recording, storage, and retrieval for surveillance systems across train carriages. Multi-camera input supports security monitoring, pantograph inspection, and passenger counting applications within a single system.

• Wireless Connectivity for Fleet Management

  LTE/5G, Wi-Fi, and GPS support enable real-time communication between onboard systems and control centers, supporting fleet management, remote diagnostics, and passenger information updates during transit.

Common Railway Applications

• Onboard Surveillance and NVR

  Railway computers with NVR functionality record and store video from multiple onboard cameras, supporting security monitoring across passenger carriages, platforms, and cab areas throughout the journey.

• Passenger Information Systems

  Onboard computing platforms manage real-time route data, station announcements, and display updates for passenger information screens, connecting to trackside and depot infrastructure via wireless links.

• Train Management and Condition Monitoring

  Railway PCs support data acquisition from sensors monitoring speed, temperature, door status, and system health, feeding into onboard control logic and remote fleet management platforms.

• Pantograph and Track Monitoring

  High-resolution camera input and local processing capability make these platforms suitable for automated monitoring of pantograph condition, track geometry, and overhead line status during normal service operation.

• IoV and Smart Mobility Integration

  Internet of Vehicles applications on rail platforms use onboard computing to aggregate sensor data, support V2X communication, and connect rolling stock into broader smart transit network infrastructure.

How to Select the Right Railway PC

Selection for rail projects typically starts with the certification requirement and the power input specification of the rolling stock. EN50155 compliance is the baseline for most onboard applications, but projects may also require EN45545 fire safety compliance or EN50121 EMC standards depending on the deployment region and vehicle type. From there, the processing tier, camera and I/O configuration, and wireless connectivity options narrow the choice based on the specific application.

• EN50155 certification class and applicable operating temperature range
• DC input voltage range: 24V, 72V, 110V, or wide-range
• NVR requirement: number of camera channels and storage capacity
• M12 connector configuration for I/O and network ports
• Wireless: LTE/5G, Wi-Fi, GPS for fleet and passenger systems
• Additional certifications: EN45545, EN50121, or MIL-STD
• Processing tier based on video analytics or AI workload
• Long-term availability and lifecycle support for rolling stock programs

Frequently Asked Questions

Q: What is a railway PC?

A: A railway PC is a ruggedized computing platform certified for installation on rolling stock and rail vehicles. Unlike standard industrial computers, these systems are specifically designed and tested to meet EN50155 requirements covering temperature, vibration, shock, power supply behavior, and electromagnetic compatibility for rail environments.

Q: What does EN50155 certification mean for a railway computer?

A: EN50155 is the international standard governing electronic equipment installed on railway rolling stock. A railway computer with EN50155 certification has been tested and validated for onboard rail use, covering requirements across thermal conditions, mechanical stress, humidity, EMC, and power supply variations. Most rolling stock procurement projects in Europe require EN50155 compliance as a baseline.

Q: Why do railway computers use M12 connectors?

A: M12 connectors are designed to maintain reliable connections under continuous vibration and mechanical stress. Standard I/O ports can loosen or fail in rail environments where the vehicle generates constant movement. M12 connectors lock securely and resist both vibration and ingress, making them the standard choice for onboard rail installations.

Q: What is the difference between EN50155 and EN45545?

A: EN50155 covers the general requirements for electronic equipment on rolling stock, including thermal, mechanical, and electrical behavior. EN45545 is the fire safety standard for railway vehicles, governing flammability, smoke toxicity, and flame spread of materials used in construction. Rail projects often require compliance with both standards.

Q: Can ARBOR railway box PCs support onboard NVR applications?

A: Yes. Select platforms support NVR functionality with multi-camera input, local video storage, and retrieval capability for surveillance and monitoring applications across train carriages and cab environments.

Q: What should I confirm before selecting a railway computer for a rolling stock project?

A: Start with the required EN50155 certification class and the DC input voltage range of the rolling stock. Then confirm the camera and I/O requirements, wireless connectivity needs, any additional certifications such as EN45545 or EN50121, and the expected service lifecycle of the deployment. Long-term product availability is particularly important for rail programs where rolling stock remains in service for many years.

Browse ARBOR railway box PCs to find the right EN50155-certified platform for your rolling stock or transit project. Contact ARBOR to discuss certification requirements, vehicle type, and system integration needs.