This standard specifies limits and measuring methods for the emission and immunity of electrical and electronic apparatus that are foreseen to be installed in rolling stock. The requirements are valid for the frequency range 0 Hz to 400 GHz. Typical examples for the apparatus that are covered in this standard are listed in annex A. The specific requirements apply together with the EN 50121-1. In relation to the previous edition table 3 was replaced by a reference in clause 7 to EN 61000-6-4, Tabelle 1 and Annex ZZ was matched with the new requirements.