Railway design engineers face complex challenges when specifying and integrating onboard technology.

They must ensure mechanical robustness, electrical compatibility, and modularity across multiple subsystems while meeting strict safety, EMC, and operational standards and complying with long lifecycle requirements and evolving railway regulations. The good news is that 19-inch chassis (or 19" rack systems) meet these demands, which is why they remain the standard for onboard train applications.

But how do engineers achieve this, and why is 19” the preferred choice?

5 REASONS 19” CHASSIS IS THE PREFERRED RAILWAY STANDARD

1. Globally recognized standard (IEC 60297)

• Easy mounting of modules, racks, and power supplies
• Multi-vendor compatibility for flexible sourcing
• Integrates control, communication, video, and signalling equipment in one frame

2. Vibration, shock, and temperature resistance (EN 50155 / EN 61373)

• Reinforced 19" chassis with secure card guides ensures stable PCB mounting in harsh conditions
  

3. Easy maintenance and modular upgrades

• Standard racks allow quick module replacement without redesign
• New equipment fits existing 19" chassis for seamless upgrades

4. EMC and safety compliance
Ensuring signal integrity with EMC-compliant 19” system housings is critical. Electromagnetic interference (EMI) can disrupt communications, degrade data, and affect train control, safety, and operational efficiency. 

• Proper grounding, shielding, and airflow for EMC (EN 50121) and fire safety (EN 45545)
• Consistent, testable environment for certification
  

Download this whitepaper to learn more about managing EMI in railway systems.

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