3 Terms and definitions. 4.2 Principles of guard interlocking without guard locking. 4.1 General. Interlocking devices associated with guards ? Example of a fi xed guard. Introduction. It is not dependent upon moving parts to function. This guard is usually preferable to all other types because of its relative simplicity. If the machine has to cool down after heaters are switched off, time delay interlocks should be fitted to covers giving access to dangerous parts. This NSC publication also provides a list of interlock guard advantages and disadvantages. SICK AG WHITEPAPER DESIGN AND SELECTION OF INTERLOCKING DEVICES IN ACCORDANCE WITH EN ISO 14119 AUTHOR Otto Görnemann Manager Machine Safety & Regulations at SICK AG in Waldkirch/Germany SUMMARY The new standard EN ISO 14119 "Safety of machinery - Interlocking devices associated with guards - Principles for design and selection" was published at the end of … Buy. It may be constructed of sheet metal, screen, wire cloth, bars, plastic, or any other material that is substantial enough to withstand whatever impact it may receive and to endure prolonged use. The design of guards may have to take into account the need to adjust drive The design of guards may have to take into account the need to … These examples include an interlocked safety prop on a hydraulic press, an interlocked barrier guard on a bagging machine, and an interlocked clean-out door. Foreword. Table of contents. … As its name implies, a fixed guard is a permanent part of the machine. 2 Normative references. Standard of interlocking required is to be determined by a risk assessment. The machine should be provided with means of isolation which complies with the machinery directive and which are clearly labelled. 4 Operating principles and typical forms of interlocking devices associated with guards. Follow. Key: 1) guard, 2) Interlocking device, 3) Actuator, 4) Position switch, 5) Actuating system, 6) Output system, a) Direction of opening. Safety of machinery ? Principles for design and selection . Four basic designs . 1) Guard Monitoring and Interlocking Guard monitoring and interlocking switches are one of the most important types of protective devices to prevent dangerous situations by shutting power off from the machine. Multiple means of isolation may be required. Example of an interlocking device . 1 Scope.