BS-EN-60297-3-105-2009.pdf

Mechanical structures for electronic equipment Dimensions of mechanical structures of the 482,6 mm (19 in) series Part 3-105: Dimensions and design aspects for 1U high chassis BS EN 60297-3-105: 2009 raising standards worldwide NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BSI British Standards Licensed CopyChinese University of Hong Kong, 11/04/2009 07:46, Uncontrolled Copy, (c) BSI National foreword This British Standard is the UK implementation of EN 60297-3-105:2009. It is identical to IEC 60297-3-105:2008. The UK participation in its preparation was entrusted to Technical Committee EPL/48, Electromechanical components and mechanical structures for elec- tronic equipment. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. © BSI 2009 ISBN 978 0 580 58287 5 ICS 31.240 Compliance with a British Standard cannot confer immunity from legal obligations. Amendments issued since publication Amd. No. Date Text affected BRITISH STANDARDBS EN 60297-3-105:2009 This British Standard was published under the authority of the Standards Policy and Strategy Committee on February 2009.2 8 Licensed CopyChinese University of Hong Kong, 11/04/2009 07:46, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD EN 60297-3-105 NORME EUROPÉENNE EUROPÄISCHE NORM January 2009 CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung Central Secretariat: avenue Marnix 17, B - 1000 Brussels © 2009 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60297-3-105:2009 E ICS 31.240 English version Mechanical structures for electronic equipment - Dimensions of mechanical structures of the 482,6 mm (19 in) series - Part 3-105: Dimensions and design aspects for 1U high chassis (IEC 60297-3-105:2008) Structures mécaniques pour équipements électroniques - Dimensions des structures mécaniques de la série 482,6 mm (19 pouces) - Partie 3-105: Dimensions et aspects de conception pour les châssis d'une hauteur de 1U (CEI 60297-3-105:2008) Bauweisen für elektronische Einrichtungen - Maße der 482,6-mm-(19-Zoll-)Bauweise - Teil 3-105: Maße und Ausführungen von 1U-Einschüben (IEC 60297-3-105:2008) This European Standard was approved by CENELEC on 2008-12-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 60297-3-105:2009 Licensed CopyChinese University of Hong Kong, 11/04/2009 07:46, Uncontrolled Copy, (c) BSI EN 60297-3-105:2009 - 2 - Foreword The text of document 48D/381/FDIS, future edition 1 of IEC 60297-3-105, prepared by SC 48D, Mechanical structures for electronic equipment, of IEC TC 48, Electromechanical components and mechanical structures for electronic equipment, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60297-3-105 on 2008-12-01. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2009-09-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2011-12-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 60297-3-105:2008 was approved by CENELEC as a European Standard without any modification. _ BS EN 60297-3-105:2009 Licensed CopyChinese University of Hong Kong, 11/04/2009 07:46, Uncontrolled Copy, (c) BSI - 3 - EN 60297-3-105:2009 Annex ZA (normative) Normative references to international publications with their corresponding European publications The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC 60050-581 -1) International Electrotechnical Vocabulary (IEV) - Part 581: Electromechanical components for electronic equipment - - IEC 60297-3-100 -1) Mechanical structures for electronic equipment - Dimensions of mechanical structures of the 482,6 mm (19 in) series - Part 3-100: Basic dimensions of front panels, subracks, chassis, racks and cabinets EN 60297-3-100 20092) IEC 60917-1 -1) Modular order for the development of mechanical structures for electronic equipment practices - Part 1: Generic standard EN 60917-1 19982) IEC 61587-1 -1) Mechanical structures for electronic equipment - Tests for IEC 60917 and IEC 60297 - Part 1: Climatic, mechanical tests and safety aspects for cabinets, racks, subracks and chassis EN 61587-1 20072) IEC 61587-2 -1) Mechanical structures for electronic equipment - Tests for IEC 60917 and IEC 60297 - Part 2: Seismic tests for cabinets and racks EN 61587-2 20012) IEC 61587-3 -1) Mechanical structures for electronic equipment - Tests for IEC 60917 and IEC 60297 - Part 3: Electromagnetic shielding performance tests for cabinets, racks and subracks EN 61587-3 20062) 1) Undated reference. 2) Valid edition at date of issue. BS EN 60297-3-105:2009 Licensed CopyChinese University of Hong Kong, 11/04/2009 07:46, Uncontrolled Copy, (c) BSI 2 60297-3-105 © IEC:2008 CONTENTS INTRODUCTION.5 1 Scope.6 2 Normative references .6 3 Terms and definitions .6 4 Arrangement overview7 5 Dimensions of the 1U chassis.9 5.1 Chassis type A 9 5.2 Chassis type B 10 5.3 Chassis type C11 6 Climatic, mechanical tests (safety aspects, EMC, seismic) .12 Annex A (informative) Chassis and rack/cabinet relationship .13 Annex B (informative) Cooling air flow .15 Annex C (informative) Chassis depth relationship to the rack/cabinet 16 Figure 1 Chassis type A.8 Figure 2 Chassis type B.8 Figure 3 Chassis type C.8 Figure 4 Dimensions of chassis type A.9 Figure 5 Dimensions of chassis type B.10 Figure 6 Dimensions of chassis type C 11 Figure A.1 Chassis type B and rack/cabinet relationship 13 Figure A.2 Chassis type C rack/cabinet relationship.14 Figure B.1 Cooling airflow direction15 Table C.1 Maximum depth D in relation to corresponding cabinet depth.16 BS EN 60297-3-105:2009 Licensed CopyChinese University of Hong Kong, 11/04/2009 07:46, Uncontrolled Copy, (c) BSI 60297-3-105 © IEC:2008 5 INTRODUCTION Electronic systems based on 1U chassis design have become one of the most important platforms used for servers, industrial electronics, information technology (IT) and telecommunication equipment. 1U chassis are sometimes referred to as “Pizza Boxes”. Applications for 1U chassis designs are wide spread and solutions are found in every segment of the electronics industry. IEC 60297-3-100 defines the dimensional rack/cabinet details such as the available aperture and the front panel mounting dimensions. However, IEC 60297-3-100 falls short of providing guidance or dimensional requirements for assembling 1U chassis designs into these IEC 60297 conforming racks/cabinets either in singles or in multiples (stacked in n × 1U). This part of IEC 60297 will give guidance and provide for dimensional requirements for 1U chassis based on weight loading, physical size and service accessibility. In this standard, various chassis types are identified according to application needs. The defined interface dimensions of the various chassis types permit the development of common mounting accessories. Due to this clarification and the application specific chassis type choice, the serviceability and airflow aspects of the chosen 1U chassis can be addressed by the designer. Similar attributes for multiple unit high equipment may be derived from this standard. The economical value of this standard lies in the predefined interface dimensions of chassis for which suitable accessories may be developed. In addition, as a consequence of the chosen mounting support, the cooling possibilities are indicated. BS EN 60297-3-105:2009 Licensed CopyChinese University of Hong Kong, 11/04/2009 07:46, Uncontrolled Copy, (c) BSI 6 60297-3-105 © IEC:2008 MECHANICAL STRUCTURES FOR ELECTRONIC EQUIPMENT DIMENSIONS OF MECHANICAL STRUCTURES OF THE 482,6 mm (19 in) SERIES Part 3-105: Dimensions and design aspects for 1U high chassis 1 Scope This part of IEC 60297 specifies the dimensions for 1U chassis mounted into IEC 60297-3- 100 compliant racks/cabinets where dimensions, loaded weight and accessibility require differing assembly methods. Guidance for cooling and reference for EMC, seismic and for the climatic and mechanical requirements and tests are provided, as defined in the IEC 61587 series. The drawings used in this standard are not intended to indicate product design, only the specific dimensions shall be used. The terminology used complies with IEC 60917-1. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60050-581, International electrotechnical vocabulary Part 581: Electromechanical components for electronic equipment IEC 60917-1, Modular order for the development of mechanical structures for electronic equipment practices Part 1: Generic standard IEC 60297-3-100, Mechanical structures for electronic equipment Dimensions of mechanical structures of the 482,6 mm (19 in) series Part 3-100: Basic dimensions of front panels, subracks, chassis, racks and cabinets IEC 61587-1, Mechanical structures for electronic equipment Tests for IEC 60917 and IEC 60297 Part 1: Climatic, mechanical tests and safety aspects for cabinets, racks, subracks and chassis IEC 61587-2, Mechanical structures for electronic equipment Tests for IEC 60917 and IEC 60297 Part 2: Seismic tests for cabinets and racks IEC 61587-3, Mechanical structures for electronic equipment Tests for IEC 60917 and IEC 60297 Part 3: Electromagnetic shielding performance tests for cabinets, racks and subracks 3 Terms and definitions For the purposes of this document, the terms and definitions of IEC 60917-1 and IEC 60050- 581 apply, as well as the following. BS EN 60297-3-105:2009 Licensed CopyChinese University of Hong Kong, 11/04/2009 07:46, Uncontrolled Copy, (c) BSI 60297-3-105 © IEC:2008 7 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 19 in cabinet cabinet in accordance with IEC 60297-3-100 19 in vertical members parts of a cabinet with the mounting holes for front panels, chassis and subracks chassis slides angled parts mounted in the cabinet to support heavy or deep chassis (see also IEC 60917-1) telescopic slide extendable mounting support for heavy or deep chassis within a cabinet, providing easy access to rear parts in extended position of the chassis aperture of a cabinet horizontal opening dimension between two 19 in uprights height pitch line theoretical line between any increment of U (1U = 44,45 mm) cable management cable routing within a cabinet to the equipment chassis mounting flanges may be an integrated part of the chassis or separate brackets attached to the chassis cable pull factor summary of cable weight, linked to the chassis 4 Arrangement overview The arrangement overview in Figure 1 illustrates the chassis mounting methods into a typical 19 in cabinet. The 1U chassis dimensions differ pending on the choice of the chassis type and resulting mounting dimensions. There are three types of chassis, determined by the principal methods of mounting into a cabinet. The definitions of the three types of chassis are: Chassis type A: This type of chassis is mounted into racks/cabinets without chassis supports (light weight, shallow equipment with low cable pull factor, IEC 61587-1 DL 1 shock/vibration environment). For the assembly into cabinets only, the chassis mounting flanges are bolted to the 19 in uprights. This type of chassis provides the maximum use of the available width and heights within a 1U section. See Figure 1. Chassis type B: This type of chassis is designated for equipment with higher load (high rear cabling pull factor, IEC 61587-1 DL 1 shock/vibration environment). Therefore, chassis slides shall be used. The chassis design shall provide recessed areas as a space for the cabinet mounted chassis slides. See Figure 2. BS EN 60297-3-105:2009 Licensed CopyChinese University of Hong Kong, 11/04/2009 07:46, Uncontrolled Copy, (c) BSI 8 60297-3-105 © IEC:2008 Chassis type C: This type of chassis is designated for extendable equipment mounted on telescopic slides (top cover and/or rear I/O access via rear cable management, IEC 61587-1 DL 1 environment). Telescopic slides may be of two or three parts, dependent on the extension requirement. The chassis design shall provide on both sides recessed areas dependent on the required space for the telescopic slides. NOTE There is no standard for telescopic slides, mounting dimensions should be defined by the equipment design. See Figure 3. 19 in vertical member 1U chassis IEC 2064/08 Figure 1 Chassis type A 19 in vertical member Chassis slide 1U chassis IEC 2065/08 Figure 2 Chassis type B 19 in vertical member 1U chassis Telescopic slide IEC 2066/08 Figure 3 Chassis type C BS EN 60297-3-105:2009 Licensed CopyChinese University of Hong Kong, 11/04/2009 07:46, Uncontrolled Copy, (c) BSI 60297-3-105 © IEC:2008 9 5 Dimensions of the 1U chassis IEC 60297-3-100 defines the front panel dimensions and the aperture of the rack/cabinet. 5.1 Chassis type A This type of chassis is typically of either light weight, limited depth and/or has a very low cable pull factor. T