Safety of machinery - Interlocking devices associated with guards - Principles for design and selection

Specifies principles for the design and selection - independent of the nature of the energy source - of interlocking devices associated with guards (as defined in 3.23.1 "interlocking device (interlock)", 3.22.4 "interlocking guard" and 3.22.5 "interlocking guard witg guard locking" of EN 292-1:1991). It also provides requirements specifically intended for electrical interlocking devices.