1、 AMERICAN NATIONAL STANDARD ANSI/ISA-12.02.02-2014 Recommendations for the Preparation, Content, and Organization of Intrinsic Safety Control Drawings Approved 8 September 2014 ANSI/ISA-12.02.02-2014, Recommendations for the Preparation, Content, and Organization of Intrinsic Safety Control Drawings
2、 ISBN: 978-0-876640-98-2 Copyright 2014 by the International Society of Automation (ISA). All rights reserved. Not for resale. Printed in the United States of America. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means (electronic
3、mechanical, photocopying, recording, or otherwise), without the prior written permission of the Publisher. ISA 67 Alexander Drive P.O. Box 12277 Research Triangle Park, North Carolina 27709 3 ANSI/ISA-12.02.02-2014 Preface This preface, as well as all footnotes and annexes, is included for informati
4、on purposes and is not part of ANSI/ISA-12.02.02-2014. This document has been prepared as part of the service of ISA toward a goal of uniformity in the field of instrumentation. To be of real value, this document should not be static but should be subject to periodic review. Toward this end, the Soc
5、iety welcomes all comments and criticisms and asks that they be addressed to the Secretary, Standards and Practices Board; ISA; 67 Alexander Drive; P. O. Box 12277; Research Triangle Park, NC 27709; Telephone (919) 549-8411; Fax (919) 549-8288; E-mail: standardsisa.org. The ISA Standards and Practic
6、es Department is aware of the growing need for attention to the metric system of units in general, and the International System of Units (SI) in particular, in the preparation of instrumentation standards. The Department is further aware of the benefits to USA users of ISA standards of incorporating
7、 suitable references to the SI (and the metric system) in their business and professional dealings with other countries. Toward this end, this Department will endeavor to introduce SI-acceptable metric units in all new and revised standards, recommended practices, and technical reports to the greate
8、st extent possible. Standard for Use of the International System of Units (SI): The Modern Metric System, published by the American Society for Testing however, information showing the operation of the equipment can be very useful to the system designer. 5.2 Equipment identification The following mi
9、nimum information should be provided: 5.2.1 Control drawings provided by the manufacturers of intrinsically safe apparatus (as shown in Figure 1) should identify the model number(s) and entity parameters of the intrinsically safe apparatus, and should specify the entity parameters for acceptable ass
10、ociated apparatus. 5.2.2 Control drawings provided by the manufacturers of associated apparatus (as shown in Figure 2) should identify the model number(s) and entity parameters of the associated apparatus, and should specify the entity parameters for acceptable intrinsically safe apparatus, or speci
11、fy connection to simple apparatus. 5.2.3 Control drawings that specify the entire intrinsically safe system (as shown in Figure 3) should identify the model number(s) of both the associated apparatus and the intrinsically safe apparatus, and should specify the interconnection of the intrinsically sa
12、fe apparatus a nd associated apparatus. Control drawings of this type may be provided by either the manufacturer of the associated apparatus or the manufacturer of the intrinsically safe apparatus. 5.3 Entity parameters When entity parameters are provided, they should be supplied in a table or other
13、 suitable form, showing allowable values for each applicable class and group. When multi-channel associated apparatus is involved, the terminals to which the entity parameters apply should be clearly identified. It may be necessary to have more than one set of parameters for multiple terminals. It i
14、s possible to have both system configuration and entity configuration shown on the same control drawing. In such cases, it is possible for the identified associated apparatus to have entity parameters that exceed the allowed entity parameters for the intrinsically safe apparatus. Evaluation using th
15、e entity concept results in the application of more than two faults. When equipment is evaluated as a system, only two faults are applied. The entity concept provides a great deal of flexibility for configuring a system, but at the expense of excluding some equipment that would be acceptable under a
16、 system evaluation. 5.4 Hazardous location identification The control drawing should include a demarcation line between the hazardous (classified) and the nonhazardous (unclassified) locations, and should identify equipment that may be installed in each location. The hazardous locations should be id
17、entified by class, group(s), and division(s ), or class, zone(s) and group(s). 5.5 Control drawing identification The control drawing should be identified by manufacturer, identification number, sheet or page number of total, and some form of revision control (e.g., date or revision level). 5.6 Maxi
18、mum voltage Control drawings for associated apparatus should show the maximum nonhazardous location voltage that may be used with the associated apparatus. 5.7 Installation information The control drawing should contain a reference to ISA-RP12.06.01, and a reference to the National Electrical Code,
19、NFPA 70 Article 504. ANSI/ISA-12.02.02-2014 12 5.8 Other information The control drawing should include any specific conditions of use that are necessary to maintain the intrinsic safety protection. NOTE Other information such as the ambient temperature range and the temperature classification may a
20、lso be usefully added to the control drawing. 13 ANSI/ISA-12.02.02-2014 ANSI/ISA-12.02.02-2014 14 15 ANSI/ISA-12.02.02-2014 This page intentionally left blank. Developing and promulgating sound consensus standards, recommended practices, and technical reports is one of ISAs primary goals. To achieve
21、 this goal the Standards and Practices Department relies on the technical expertise and efforts of volunteer committee members, chairmen and reviewers. ISA is an American National Standards Institute (ANSI) accredited organization. ISA administers United States Technical Advisory Groups (USTAGs) and
22、 provides secretariat support for International Electrotechnical Commission (IEC) and International Organization for Standardization (ISO) committees that develop process measurement and control standards. To obtain additional information on the Societys standards program, please write: ISA Attn: Standards Department 67 Alexander Drive P.O. Box 12277 Research Triangle Park, NC 27709 ISBN: 978-0-876640-98-2
