ISO 7637-II Compliant Rugged Tablet in Vehicles


With the increasing need of passenger cars and commercial vehicles, vehicle electronic devices are widely utilized in automobiles. In order to ensure the normal performance of these electronic devices in a stable power supply system, it is crucial to overcome the problem of massive electromagnetic interference generated by vehicles during working, which spreads to the power supply system through coupling, conduction, and radiation, disturbing the operation of on-board equipment. Therefore, the international standard ISO 7637 has put forward immunity requirements for automotive electronic products on the power supply.


ISO 7637 standard, also known as: Road vehicles–Electrical interference generated by conduction and coupling, is an electromagnetic compatibility standard for automotive 12V and 24V power supply systems. It includes both the electromagnetic endurance and emission parts of electromagnetic compatibility testing. All these standards specify the parameter requirements for instruments and equipment that can be used to reproduce electrical accidents and conduct tests. As of today, the ISO 7637 standard has been released in four parts. As of today, ISO 7637 standard has released in four parts to indicate the testing methods and related parameters comprehensively. Then we will mainly introduce the second part of this standard, ISO 7637-II, which is employed to test the compatibility of our rugged tablet.


ISO 7637-II calls electrical transient conduction along supply lines only. It specifies bench tests for testing the compatibility to conducted electrical transients of equipment installed on passenger cars and light commercial vehicles fitted with a 12 V electrical system or commercial vehicles fitted with a 24 V electrical system–for both injection and the measurement of transients. Failure mode severity classification for immunity to transients is also given. It is applicable to these types of road vehicle, independent of the propulsion system (e.g. spark ignition or diesel engine, or electric motor).


ISO 7637-II test includes several different transient voltage waveforms. The rising and falling edges of these pulses or waveforms are speedy, usually in the nanosecond or microsecond range. These transient voltage experiments are designed to simulate all electrical accidents that cars may encounter under real-world conditions, including load dump. Ensuring the stable performance of on-board equipment and the safety of passengers.


Integrating an ISO 7637-II compliant rugged tablet into vehicle offers numerous advantages. Foremost, their durability ensures long-term operation and reliable performance, reducing maintenance costs and increasing overall productivity. Second, the ISO 7637-II compliant rugged tablet provides real-time visibility and control of critical information, optimizing vehicle diagnostics and increasing efficiency. Finally, these tablets can seamlessly connect with other vehicle systems and external devices, enhancing communication and interoperability. By adhering to this standard, we can build credibility, instill trust, and deliver superior products that meet the demands of customers.

Complied with ISO 7637-II standard transient voltage protection, the rugged tablets from 3Rtablet are able to withstand up to 174V 300ms vehicle surge impact and support DC8-36V wide voltage power supply. It practically improves the durability of operating critical in-vehicle systems such as telematics, navigation interfaces and infotainment displays under harsh conditions and preventing losses caused by malfunctions.

Post time: Aug-17-2023