scope:

This Standard applies to emission and immunity aspects of EMC for electrical and electronic apparatus intended for use on railway rolling stock. The frequency range considered is from d.c. to 400 GHz. At present, testing is not defined for frequencies above 1 GHz. The application of tests shall depend on the particular apparatus, its configuration, its ports, its technology and its operating conditions. This standard takes into account the internal environment of the railway rolling stock and the external environment of the railway, and interference to the apparatus from equipment such as hand-held radio transmitters. If a port is intended to transmit or receive for the purpose of radio communication then the emission and immunity limits in this standard at the communication frequency do not apply. This standard does not apply to transient emissions when starting or stopping the apparatus. The objective of this standard is to define limits and test methods for electromagnetic emissions and immunity test requirements in relation to conducted and radiated disturbances. These limits and tests represent essential electromagnetic compatibility requirements. Emission requirements have been selected so as to ensure that disturbances generated by the apparatus operated normally on railway rolling stock do not exceed a level which could prevent other appartus from operating as intended. The electromagnetic interference concerning the railway system as a whole is dealt with in EN 50121-2. These specific provisions are additional to the general provisions in EN 50121-1.