IEC 62236-4 Ed. 2.0 b:2008

IEC 62236-4:2008 specifies limits for emission and immunity and provides performance criteria for signalling and telecommunications apparatus which may interfere with other apparatus in the railway environment, or increase the total emissions for the railway environment beyond the limits defined in the appropriate standard and so risk causing electromagnetic interference to apparatus outside the railway system. The main change with respect to the previous edition consists of the requirements for the radiated immunity test.