This part of IEC 62026 specifies an interface system between single or multiple controllers, and control circuit devices or switching elements. The interface system uses two conductor pairs within one cable - one of these pairs provides a differential communication medium and the other pair provides power to the devices. This part establishes requirements for the interoperability of components with such interfaces.Cross References:EN 55011:2009+AAIEC 62026-1:2007IEC 61158-6-2:2014EN 61000-4-3:2006EN 61158-5-2:2014ASTM D 4566-94EN 60529:1991A1:2000EN 60947-5-2:2007AMD 1:2010AMD 1:1999ISO 11898-2:2003IEC 61000-4-6:2013IEC 61158-5-2:2014AMD 1:2012EN 61000-4-6:2014EN 61000-4-3:2006+A1:2008EN 55011:2009+prAAMD 1:2007ISO 11898-1:2003EN 61784-3-2A1:2010IEC 61000-4-2:2008EN 61000-4-5:2006IEC 61158-4-2:2014IEC 60947-5-2:2007IEC 61000-4-4:2012AMD 2:2013EN 61158-6-2:2014AMD 2:2010IEC 61784-3-2corrigendum May 1993CISPR 11:2009EN 61000-4-2:2009IEC 61000-4-5:2005EN 60947-5-2:2007+A1:2012EN 55011:2009EN 61158-4-2:2014ANSI B93.55M-1981 (R1988)IEC 60529:1989IEC 61000-4-3:2006EN 61000-4-4:2012A2:2013EN 61000-4-3:2006+A2:2010EN 62026-1:2007ISO/IEC 7498-1:19942004/108/ECUL 1277IEC 61158IEC 61508NEMA 250IEC 7498-1:1995EN 61784-5-2IEC 61784-5-2IEC 61784-1EN 61784-1IEC 61131-3:2013EN 61158EN 61131-3:2013EN 61508ASME B1.1Replaces BS EN 62026-3:2015 which remains currentIncorporates the following:Amendment, February 2020