DIN EN 50578:2013-12

This European Standard gives a set of generic and specific requirements for direct current signalling relays. This European Standard introduces a set of recommendations and requirements for signalling relay characteristics, construction, magnetic system, contacts and insulation. Requirements are coordinated with present International Standards on all-or-nothing relays. Beyond the field of railway signalling technology, relays having the characteristics described in this European Standard are also designated as "relays with forcibly guided (mechanically linked) contacts" (safety relays). The responsible committee is UK 351.3 "Bahn-Signalanlagen" ("Signalling systems for railways") of the DKE (German Commission for Electrical, Electronic and Information Technologies) at DIN and VDE.