Railway systems and rolling stock have become increasingly advanced both from a technical and passenger point of view, with additional information systems and enhanced safety-critical equipment. Electronic and electrical systems, such as operational dashboards, driver consolesand control system interfaces are now crucial requirements.
The European EN50155:2017 standard is a specialised compliance standard for electronic equipment and systems intended for use in railway applications, which is considered as equivalent to the international standard IEC 60571. Product qualification to the EN50155 standard confirms that a device or system meets rigorous requirements to operate safely and reliably under the demanding environmental conditions typically encountered on trains and other rolling stock. These conditions include extreme temperature fluctuations, high humidity levels, mechanical vibration and shock, and electromagnetic compatibility.
“JDIT-K EN50155 OT3 compliance displays have been designed and developed to provide robust electrical, mechanical and environmental characteristics that are highly resistant to vibration, shock, electro-static discharge and temperature variation, even exceeding the EN50155 standard test criteria. In addition, JDIT-K has established knowledge and experience supporting and supplying customers with EN50155 compliance display modules in existing railway applications in Europe and Asia. With our products achieving EN50155 compliance, we can guarantee the long-term ruggedness and reliability of display modules for our end customers,” said Benson Huang, Marketing Manager JDIT-K.
To achieve EN50155 compliance a TFT display module must incorporate several key design and engineering features. These include:
- Environmental stability: the display module must operate effectively over an extended temperature range and be resilient to rapid temperature variations as environmental operating conditions can change rapidly
- Mechanical integrity: the display module must be able to withstand constant vibration and occasional shock without any compromise in display performance or integrity
- Ingress protection: display modules are designed with appropriate sealing and protective measures to mitigate exposure to dust, foreign contaminants and moisture
- Electromagnetic compatibility: the display module must be resistant to electromagnetic interference from other electronic devices, pass an EMC test, ensuring safe and consistent operation
- Power supply: the internal electronics of the display module are able to manage minor fluctuations in the power supply to avoid unexpected fault or failure conditions.
With EN50155 compliance, JDIT-K TFT display modules will operate reliably within a demanding railway application environment. This is especially important given the increasing reliance on digital displays in modern rolling stock. The EN50155 standard provides railway operators with confidence that the display technology integrated into their equipment and systems will perform under rigorous operating conditions while minimising downtime and maintenance costs.
