ISO INTERNATIONAL STANDARD 14119 First edition 1998-05-01 Safety of machinery - Interlocking devices associated with quards Principles for design and selection Sécurité des machines - Dispositifs de verrouillage associés a des protecteurs - Principes de conception et de choix TSO Referencenumber ISO 14119:1998(E) ISO 14119:1998(E) Contents 1 Scope 2 Normative references 3Definitions 4 Operating principles and typical forms of interlocking devices associated with guards. .3 5 Provisions for the design of interlocking devices (independent of the nature of the energy source)..... 6 Additional technological requirements for electrical interlocking devices 7 Selection of an interlocking device.. Annex A Guard-operated interlocking device with one cam-operated position detector (see Introduction)...18 Annex B Guard-operated interlocking device with tongue-operated switch (see Introduction). .20 Annex C Direct (mechanical) interlocking between guard and start/stop manual control (see Introduction) ..22 Annex D Captive-key interlocking device (see Introduction) 24 Annex E Trapped-key interlocking device (see Introduction) ...26 Annex F Plug and socket interlocking device (plug/socket combination) (see Introduction), .28 Annex G Guard-operated interlocking device incorporating two cam-operated position detectors (see Introduction) .. ..30 Annex H Mechanical interlocking between a guard and a movable element (see Introduction)... ..32 Annex J Electrical interlocking device incorporating magnetically actuated (magnetic) switches (see Introduction).. Annex K Electrical interlocking device incorporating two proximity detectors (see Introduction).... ....35 Annex L Pneumatic/hydraulic interlocking devices (see Introduction), ..37 Annex M Interlocking device with spring-applied/power-released guard locking device... Annex N Interlocking device with guard locking, with manually operated delay device . ..41 Annex P Bibliography 42 @ISO1998 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced microfilm, without permission in writing from the publisher. nternationalOrganizationforStandardization Case postale 56 . CH-1211 Geneve 20 · Switzerland Internet central@iso.ch X.400 C=ch; a=400net; p=iso; o=isocs; S=central Printed in Switzerland ii @ISO ISO 14119:1998(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies (IsO committees. Each member body interested in a subject for which a technical committee has been established has liaison with IsO, also take part in the work. IsO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. International Standard ISO 14119 was prepared by Technical Committee ISO/TC 199, Safety of machinery. ISO 14119 has been published by the European Committee on Standardization (CEN) as EN 1088. Annexes A to P of this International Standard are for information only ii