ISO INTERNATIONAL STANDARD 14119 Second edition 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 ISO 14119:2013(E) LSO IS02013 HS under ted without license from IHS Not for Resale IS0 14119:2013(E) COPYRIGHTPROTECTEDDOCUMENT ISO2013 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior 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 @ IS0 2013 - All rights reserved No reproductic networking permited without license from IHS Not for Resale 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 Principles of guard interlocking without guard locking 4.2 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 safetyfunction. ..55 Annex H (informative) Motivation to defeat interlocking device ..61 iii e with IS ed without license from IHS Not for Resale