ISO INTERNATIONAL STANDARD 22201-1 First edition 2017-02 Lifts (elevators), escalators and moving walks Programmable electronic systems in safety-related applications Part 1: Lifts (elevators) (PESSRAL) Ascenseurs, escaliers mécaniques et trottoirs roulants - Systemes électroniques programmables dans les applications liées a la sécurité Partie 1: Ascenseurs (PESSRAL) Reference number ISO 22201-1:2017(E) International Organization for Standardization @ IS0 2017 IS0 22201-1:2017(E) COPYRIGHTPROTECTEDDOCUMENT IS0 2017, 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. ISOcopyrightoffice Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 [email protected] www.iso.org Intenationaibr PrganizationforStandardization icensee-ZHEJIANG INST OF STANDARDIZRoISQ s1.7 - All rights reserved Not for Resale, 2017/5/11 02:42:12 etworking permitted without license from IHS IS0 22201-1:2017(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. ..1 2 Normative references 3 Terms and definitions ..2 4 Symbols and abbreviated terms ..6 5 Requirements .7 5.1 General .7 5.2 Extended application of this document. .7 5.2.1 General .7 5.2.2 Risk assessment. 7 5.2.3 Limits for specifying SILforPESSRAL .7 5.2.4 Safe-state requirements .8 5.3 Safety function SIL requirements 8 5.4 SIL-relevant and non-SIL-relevant safe-state requirements .8 5.5 Implementation and demonstration requirements for verification of sIL compliance. 20 5.5.1 General 20 5.5.2 Required techniques and measures to implement and demonstrate PE systems compliance with specified safety integrity levels. .20 5.5.3 Loss of power after a PESSRAL device has actuated. .20 Annex A (normative) Techniques and measures to implement, verify and maintain SIL compliance. .21 Annex B (informative) Applicable lift codes, standards and laws ..36 Annex C (informative) Example of a risk-reduction decision table ..47 Bibliography ..48 iii thout license from IHS