What is BS EN 45535-2:2017

The BS EN 45535-2:2017 is a technical standard that provides requirements and guidelines for electromagnetic compatibility (EMC) of equipment installed on buses and coaches. It specifically focuses on emission and immunity requirements, with the aim of ensuring that the equipment can function properly in the presence of electromagnetic disturbances.

of BS EN 45535-2:2017

This technical standard is applicable to various types of equipment used in buses and coaches, including electronic control systems, communication systems, entertainment systems, and more. It outlines the test methods and performance criteria to evaluate the compatibility of these devices with the electromagnetic environment of a bus or coach.

The BS EN 45535-2:2017 is based on the concept of Electromagnetic Compatibility (EMC), which refers to the ability of electrical and electronic systems to coexist and operate properly in the same electromagnetic environment without causing or experiencing interference. Compliance with this standard ensures that the equipment will not adversely affect the safety, functionality, or performance of other electronic systems installed on the vehicle.

Emission Requirements

The BS EN 45535-2:2017 specifies limits for the radiated and conducted electromagnetic emissions produced by the equipment when operating normally. Radiated emissions refer to electromagnetic energy radiating from the equipment and propagating through free space. Conducted emissions, on the other hand, occur when the electromagnetic energy is conducted along cables and power lines.

By setting limits for both radiated and conducted emissions, this standard aims to prevent any disruption or interference caused by the equipment to other onboard systems or to external radio frequency services. This helps maintain clear communication channels and reduces the risk of performance degradation of critical systems.

Immunity Requirements

While emission requirements focus on limiting the interference caused by the equipment, immunity requirements outlined in BS EN 45535-2:2017 deal with the ability of the equipment to withstand electromagnetic disturbances without malfunctioning or becoming damaged. Immunity represents the equipment's resistance to external electromagnetic fields.

The standard specifies various test methods to evaluate the immunity of the equipment against common sources of electromagnetic disturbances, such as electrostatic discharge, radiated electromagnetic fields, and transients induced by power supply networks. By complying with these immunity requirements, the equipment ensures its reliability and robustness in real-world environments where electromagnetic disturbances are commonplace.