ISO INTERNATIONAL STANDARD 14119 Secondedition 2013-10-01 Safety of machinery Interlocking devices associated with guards - Principles for design and selection Sécurite des machines - Dispositifs de verrouillage associés a des protecteurs - Principes de conception et de choix Reference number IS0 14119:2013(E) ISO IS02013 IS0 14119:2013(E) COPYRIGHT PROTECTED DOCUMENT @IS02013 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form written permission. Permission can be requested from either ISO at the address below or ISO's member body in the country of the requester. ISO copyright office Case postale 56 · CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyright@iso.org Web www.iso.org Published in Switzerland i @ IS0 2013 - All rights reserved IS0 14119:2013(E) Contents Page Foreword ..V Introduction ..vi 1 Scope. ..1 2 Normative references ..1 3 Terms and definitions 1 4 Operating principles and typical forms of interlocking devices associated with guards.... 6 4.1 General .6 4.2 Principles of guard interlocking without guard locking ..8 4.3 Principles of guard interlocking with guard locking. 8 5 Requirements for the design and the installation of interlocking devices with and without guard locking. .11 5.1 General 11 5.2 Arrangement and fastening of position switches 11 5.3 Arrangement and fastening of actuators. .12 5.4 Actuationmodesofinterlockingdevices .12 5.5 Interface to control systems... .13 5.6 Mechanical stop ..13 5.7 Additional requirements on guard locking devices .13 6 Selection of an interlocking device .18 6.1 General .18 6.2 Selection of a guard locking device 19 6.3 Environmental conditions considerations .21 7 Design to minimize defeat possibilities of interlocking devices .21 7.1 General, 21 7.2 Additional measures to minimize defeat possibilities of interlocking devices ..23 8 Control requirements. .26 8.1 General. 26 8.2 Assessment of faults .26 8.3 Prevention of common cause failures 27 8.4 Release of guard locking device 29 8.5 Faultexclusion. 29 8.6 Logical series connection of interlocking devices .29 8.7 Electrical and environmental conditions. ..30 9 Information for use. ..30 9.1 General. ..30 9.2 Information for use given by the manufacturer of interlocking devices .30 9.3 Information for use given by the manufacturer of the machine .32 Annex A (informative) Type 1 interlocking device Examples ..33 Annex B (informative) Type 2 interlocking device - Examples ..38 Annex C (informative) Type 3 interlocking device Example ..43 Annex D (informative) Type 4 interlocking devices - Examples ..45 Annex E (informative) Examples of other interlocking devices. ..48 Annex F (informative) Example of guard locking devices ..49 Annex G (informative) Application examples of interlocking devices used within a safety function. ..5 Annex H (informative) Motivation to defeat interlocking device .61 @ IS0 2013 - All rights reserved ii