ISO INTERNATIONAL STANDARD 13850 Third edition 2015-10-01 Safety of machinery Emergency stop function - Principles for design Sécurité des machines - Fonction d'arret d'urgence - Principes de conception Reference number ISO 13850:2015(E) ISO @IS02015 IS0 13850:2015(E) COPYRIGHT PROTECTED DOCUMENT @ IS0 2015, Published in Switzerland 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 Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +4122 749 09 47 [email protected] www.iso.org @ IS0 2015 - All rights reserved IS0 13850:2015(E) Contents Page Foreword .iv Introduction. ..V 1 Scope. ..1 2 Normative references ..1 3 Terms and definitions .1 4 Safety requirements .3 4.1 General requirements .3 4.1.1 Emergency stop function. .3 4.1.2 Span of control of emergency stop device(s) .4 4.1.3 Stop categories .5 4.1.4 Disengagement (e.g. unlatching) of the emergency stop device 4.1.5 Emergency stop equipment 6 4.2 Operating conditions, environmental influences. .6 4.3 Emergency stop device. .6 4.4 Use of wires or ropes as actuators .8 4.5 Prevention of unintended actuation of an emergency stop device. .9 4.6 Portable operator control stations .9 4.6.1 Emergency stop functions on portable operator control stations .9 4.6.2 Emergency stop reset for cableless operator control stations. .10 Bibliography .11 isn ta tandardzaon rights reserved iii