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This document describes characteristic features of binary 24V interfaces that use dynamic test pulses.   The purpose of this document is to describe terms and definitions; define…

The ZVEI Automation Association has adopted a new ZVEI recommendation for the classification of binary 24 V interfaces with testing in the area of functional safety. The recommendation presents -…

Is certification for voice alarm control and indicating equipment (VACIE) to EN 54-16 and EN 54-4 required in Europe? What are the components of VACIE and can these be certified individually? The…

European-wide uniform technical requirements for fire protection of all used materials in rolling stock. UL 1446 is an administrative test standard that is primarily concerned with the chemical…

If equipment is developed according to harmonised standards listed in the EU Official Journal, there is a presumption of conformity with the safety objectives of the corresponding directives, e.g.…