1、BRITISH STANDARD BS EN 60917-2-2:1997 IEC 917-2-2: 1994 Modular order for the development of mechanical structures for electronic equipment practices Part 2: Sectional specification Interface co-ordination dimensions for the25mm equipment practice Section 2: Detail specification Dimensions for subra
2、cks, chassis, backplanes, front panels and plug-in units The European Standard EN 60917-2-2:1996 has the status of a British Standard ICS 31.240BSEN60917-2-2:1997 This British Standard, having been prepared under the directionof the Electrotechnical Sector Board, was published underthe authority of
3、the Standards Board and comes intoeffect on 15April1997 BSI 11-1999 The following BSI references relate to the work on this standard: Committee reference EPL/48/4 Draft announced in BSI Update September 1994 ISBN 0 580 27302 4 Committees responsible for this British Standard The preparation of this
4、British Standard was entrusted by Technical Committee EPL/48, Electromechanical components for electronic equipment, to Subcommittee EPL/48/4, Mechanical structures for electronic equipment, upon which the following bodies were represented: Association of Manufacturers Allied to the Electrical and E
5、lectronic Industry (BEAMA Ltd.) British Telecommunications plc Federation of the Electronics Industry Amendments issued since publication Amd. No. Date CommentsBSEN60917-2-2:1997 BSI 11-1999 i Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 Text of EN 60917-2-
6、2 5 List of references Inside back coverBSEN60917-2-2:1997 ii BSI 11-1999 National foreword This British Standard has been prepared by Subcommittee EPL/48/4and is the English language version of EN60917-2-2:1995Modular order for the development of mechanical structures for electronic equipment pract
7、ices Part2:Sectional specification Interface co-ordination dimensions for the25mm equipment practice Section2:Detail specification Dimensions for subracks, chassis, backplanes, front panels and plug-in units, published by the European Committee for Electrotechnical Standardization (CENELEC). It is i
8、dentical with IEC917-2-2:1994, published by the International Electrotechnical Commission (IEC). A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard doe
9、s not of itself confer immunity from legal obligations. Cross-references Publication referred to Corresponding British Standard HD 550 S1:1989 (IEC 916:1988) BS 7728:1994 Mechanical structures for electronic equipment. Terminology EN 60917 (IEC 917) BS EN 60917 Modular order for the development of m
10、echanical structures for electronic equipment practices EN 60917-0:1992 (IEC 917-0:1989) Part 0:1992 Guide for the users of IEC Publication 917 EN 60917-2:1994 (IEC 917-2:1992) Part 2:1994 Sectional specification. Interface co-ordination dimensions for the 25 mm equipment practice EN 60917-2-1:1995
11、(IEC 917-2-1:1993) Section 1:1997 Detail specification Dimensions for cabinets and racks Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theEN title page, pages2to32, an inside back cover and a back cover. This standard has been updated (see copyright d
12、ate) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60917-2-2 January 1996 ICS 31.240 Descriptors: Interface co-ordination dimensions, 25mm equipment practice, subracks, chassis, b
13、ackplanes, front panels and plug-in units English version Modular order for the development of mechanical structures for electronic equipment practices Part2:Sectional specification Interface co-ordination dimensions for the25mm equipment practice Section 2: Detail specification Dimensions for subra
14、cks, chassis, backplanes, front panels and plug-in units (IEC 917-2-2:1994) Ordre modulaire pour le dveloppement des structures mcaniques pour les infrastructures lectroniques Partie2:Spcifation intermdiaire Dimensions de coordination pour les interfacesdes infrastructures au pas de25mm Section2: Sp
15、cification particulire Dimensions pour bacs, chssis, fonds de paniers, faces avant et units enfichables (CEI917-2-2:1994) Modulordnung fr die Entwicklung von Bauweisen fr elektronische Einrichtungen Teil2:Strukturnorm Schnittstellen-Koordinationsmae fr die 25-mm-Bauweise Hauptabschnitt2: Manorm Mae
16、fr Baugruppentrger, Einschbe, Rckplatten, Frontplatten und steckbare Baugruppen (IEC917-2-2:1994) This European Standard was approved by CENELEC on1995-11-28. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standar
17、d 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
18、, 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, De
19、nmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotec
20、hnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1996 Copyright reserved to CENELEC members Ref. No. EN 60917-2-2:1996 EEN60917-2-2:1996 BSI 11-1999 2 Foreword The text of the International Standard IEC917-2-2:1994, prepared by SC48D, Mechanical structures for electronic equi
21、pment, of IEC TC48, Electromechanical components and mechanical structures for electronic equipment, was submitted to the formal vote and was approved by CENELEC as EN60917-2-2on1995-11-28without any modification. The following dates were fixed: Annexes designated “normative” are part of the body of
22、 the standard. In this standard, Annex ZA is normative. Annex ZA has been added by CENELEC. Endorsement notice The text of the International Standard IEC917-2-2:1994was approved by CENELEC as a European Standard without any modification. Contents Page Foreword 2 1 Scope 5 2 Normative references 5 3
23、Terminology 5 4 Equipment arrangement 7 5 Dimensions 8 5.1 Subracks 8 5.1.1 Type A subrack, connector application with backplane 8 5.1.2 Type B subrack, connector application without backplane 13 5.1.3 Type C subrack 14 5.1.4 Chassis 15 5.2 Backplane 15 5.2.1 Backplane dimensions 15 5.3 Internal co-
24、ordination and backplane grid 16 5.4 Front panels on cabinets or racks and dimensions for subracks and chassis mounting flanges 17 5.5 Types of plug-in units 19 5.5.1 P type plug-in units 20 5.5.2 P type plug-in units with injector/extractor handles 23 5.5.3 K frame type plug-in units to accommodate
25、 P type plug-in units 24 5.5.4 L frame type plug-in units with front panels to accommodate P type plug-in units without front panels 25 5.5.5 M box type plug-in units with male guides 26 5.5.6 N box type plug-in units without male guides 27 5.5.7 Clearance of plug-in units in subrack 28 5.6 Terms, d
26、efinitions and tables of dimensions 29 5.6.1 Nomenclature 29 5.6.2 Height dimensions 30 5.6.3 Width dimensions 31 5.6.4 Depth dimensions 31 Annex ZA (normative) Normative references tointernational publications with their corresponding European publications 32 Figure 1 Examples of subracks, backplan
27、es, plug-in units and cabinet or rack front panels 7 latest date by which the ENhas to be implemented at national level by publication of an identical national standard or by endorsement (dop) 1996-12-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 1
28、996-12-01EN60917-2-2:1996 BSI 11-1999 3 Page Figure 2 Dimensional relationship for subrack and plug-in units 9 Figure 3a Subrack dimensions for mounting plug-in units, plug-in unit guides andbackplanes 10 Figure 3b Dimensions of subracks and fastening arrangement 11 Figure 3c Plug-in unit guides and
29、 plug-in unit positions 12 Figure 4 Optional subrack with front panels for electromagnetic interference (EMI) shielding 13 Figure 5 Mounting dimensions for connectors without backplane 14 Figure 6 Type C subrack dimensions 14 Figure 7 Backplane dimensions 15 Figure 8 Relationship between reference p
30、lanes and backplane grid 16 Figure 9 Mounting dimensions for rack or cabinet front panels, subracks and chassis 17 Figure 10 Mounting height dimensions for rack or cabinet front panels, chassis and subrack mounting flanges 18 Figure 11 Examples of types of plug-in units 19 Figure 12 P type plug-in u
31、nit dimensions 20 Figure 13 Front panels for plug-in units 21 Figure 14 Printed board dimensions 22 Figure 15 P type plug-in unit injector/extractor handle dimensions 23 Figure 16 K frame type plug-in units 24 Figure 17 L frame type plug-in units 25 Figure 18 M box type plug-in units 26 Figure 19 N
32、box type plug-in units 27 Figure 20 Typical plug-in unit arrangements 28 Table 1a Dimensions for subracks, chassis, backplanes and plug-in units 30 Table 1b Dimensions for cabinet or rack front panels 30 Table 2a Dimensions for subracks, cabinet or rack front panels and chassis 31 Table 2b Dimension
33、s for plug-in unit front panels 31 Table 3 Dimensions for subracks and chassis 314 blankEN60917-2-2:1996 BSI 11-1999 5 1 Scope This section of IEC917-2is a detail specification which is to be used in whole or in part in all fields of electronics where devices and systems are designed according to th
34、e sectional specification IEC917-2. The purpose of this publication is the specification of dimensions which will ensure mechanical interchangeability of subracks, chassis, plug-in units, backplanes and front panels. The sectional specification IEC917-2has embodied within it a number of subrack syst
35、ems based on25mm three-dimensional modularity and the binary additive principle for subrack heights. The dimensions in the tables of this detail specification are based on one of the subrack systems taken fromthe sectional specification IEC917-2. However, all subrack systems within the sectional spe
36、cification are valid in this detail specification, provided the relationship between the dimensions is maintained, i.e.thedimensional difference between the co-ordination dimensions H S , W Sand D Sand dimensions H S0 , etc.; W S0 , etc., and D S0 , etc., shown in Table 1, Table 2 and Table 3 are to
37、 be maintained. The subrack dimensions are related to certain cabinet/rack dimensions, see IEC917-2-1. The front panel dimensions are related to the mounting dimensions of certain cabinets and racks, seeIEC917-2-1. Plug-in units are mounted in subracks. They serve as supports for electrical, electro
38、nic and mechanical components. The electrical connection between plug-in units and subracks is based on the use of connectors. All dimensions are given in millimetres and the drawings are first angle projections. 2 Normative references The following normative documents contain provisions which, thro
39、ugh reference in this text, constitute provisions of this section of IEC917-2. At the time of publication, the editions indicated were valid. Allnormative documents are subject to revision and parties to agreements based on this section of IEC917-2are encouraged to investigate the possibility of app
40、lying the most recent editions of the normative documents indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. IEC 249-2, Base materials for printed circuits Part 2: Specifications. IEC 916:1988, Mechanical structures for electronic equipment Termino
41、logy. IEC 917:1988, Modular order for the development of mechanical structures for electronic equipment practices. Amendment 1:1993 IEC 917-0:1989, Modular order for the development of mechanical structures for electronic equipment practices Part 0: Guide for the users of IEC Publication 917. IEC 91
42、7-2:1992, Modular order for the development of mechanical structures for electronic equipment practices Part 2: Sectional specification Interface co-ordination dimensions for the 25 mm equipment practice. IEC 917-2-1:1993, Modular order for the development of mechanical structures for electronic equ
43、ipment practices Part 2: Sectional specification Interface co-ordination dimensions for the 25 mm equipment practice Section 1: Detail specification Dimensions for cabinets and racks. IEC 1076, Connector standards related to this 25 mm equipment practice. (in preparation) 3 Terminology For the purpo
44、ses of this section of IEC917-2, the following terminology applies. 3.1 aperture dimensions dimensions used to define space between structural parts 3.2 co-ordination dimension reference dimension used to co-ordinate mechanical interfaces, see IEC917EN60917-2-2:1996 6 BSI 11-1999 3.3 mounting pitch
45、Pitch used to arrange parts or assemblies in a given space. 3.3.1 mounting pitch for cabinets/racks and subracks mp1 = 25 mm 3.3.2 mounting pitch for subracks and plug-in units mp2 = 5 mm 3.3.3 mounting pitch for subracks and plug-in units mp3 = 2,5 mm 3.3.4 grid for backplane mp4 = 0,5 mm 3.4 grid
46、two-dimensional or three-dimensional arrangement of pitch used to co-ordinate position; seealsoIEC917,6.1, modular grid 3.5 n integer 3.6 reference plane theoretical plane without thickness or tolerance, used to define spaces. See IEC917and IEC917-0EN60917-2-2:1996 BSI 11-1999 7 4 Equipment arrangem
47、ent Figure 1 Examples of subracks, backplanes, plug-in units and cabinet or rack front panelsEN60917-2-2:1996 8 BSI 11-1999 5 Dimensions The subrack, chassis, backplane, front panel and plug-in unit dimensions for height, width and depth have been taken from the relevant tables in IEC917-2 (see5.1.1
48、.1). The subracks, chassis, plug-in units, backplanes and front panels do not need to conform with the figures illustrated; only the specified dimensions have to be applied. In the case of unspecified dimensions and tolerances the manufacturer is free to choose according to his requirements. 5.1 Sub
49、racks The detail specification standardizes three types of subracks with interchangeability of all types of plug-in units as shown in Figure 1. 5.1.1 Type A subrack, connector application with backplane Subracks designed according to type A shall be used for connector applications with a subrack mounted backplane. 5.1.1.1 If other co-ordination dimensions are used then they shall be taken from IEC917-2. In such cases, the relationship between co-ordinat
