IEC 61326-2-5:2012 treats the particular features for EMC testing of field devices with field bus interfaces. This part of IEC 61326 covers only the field bus interface of the equipment. This second edition cancels and replaces the first edition published in 2005. This edition constitutes a technical revision. The main technical changes are: Update with respect to IEC 61326-1:2012. This publication is to be read in conjunction with IEC 61326-1:2012.