1、BRITISH STANDARD Modular order for the development of mechanical structures for electronic equipment practices Part 2. Sectional specification - Interface co-ordination dimensions for the 26 mm equipment practice Section 2. Detail specification - Dimensions for subracks, chassis, backplanes, front p
2、anels and plug-in units The European Standard EN 60917-2-2 : 1996 has the status of a British Standard ICs 31.240 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGE LAW BS EN 60917-2-2 : 1997 IEC 917-2-2 : 1994 - STD.BS- BS EN b0717-2-2-ENGL 1997 m Lb2Libb9 b07415 900 m BS EN 60917-2-
3、2 : 1997 This British Standard, having been prepared under the direction of the Electrokchnicd Sector Board, was published under the authority of the Standards Board and comes into effect on 15 April 1997 O BSI 1997 Committees responsible for this British Standard The preparation of this British San
4、dard was entrusted by Technical Committee EPU48, Electromechanical components for electronic equipment, to Subcommittee EPUW4, Mechanical stnictures for electronic equipment, upon which the following bodies were represented: Association of Manufacturers Aied to the Electrical and Electronic Industry
5、 British Telecommunications pic Federation of the Electronics Industry (BEAMA La) Amendments issued since publication AmdNo. Date I The following BSI references relate to the work on this standard Committee reference EPUW4 Draft announced in BSI Update September 1994 ISBN O 680 27302 4 BS EN 60917-2
6、-2 : 1997 Contents Committees responsible National foreword pa%e Inside front cover ii Foreword 2 Text Of EN 60917-2-2 3 O BSI 1997 i STDeBSI BS N b07L7-2-2-ENGL 1797 -e lb2Llbb7 Ob07q17 783 BS EN 60917-2-2 : 1997 National foreword This British Standard has been prepared by Subcommittee EPIJW4 and i
7、s the English language veision of EN 60917-2-2 : 1995 Modular order for the development of mechanical structures for electmic equipment pmctices - Part 2: Sectid specification - InWace eo-ordination dimensions for the 25 mm equipment practice - Section 2: Deh specicatm - D.imensions for subrack, cha
8、ssis, aclcpiuw, front panels and plug-in units, published by the European Committee for Electrotechnical Standardization (CENELEC). It is identical with IEC 917-22 : 1994, published by the Internationa.l Electmkchnical Commission (IEC). Cross-references Publication referred to HD 550 S1: 1989 (EC 91
9、6 : 1988) EN 60917 (Ec 917) EN 60917-0 : 1992 (EC 917-0 : 1989) EN 60917-2 : 1994 (IEC 917-2 : 1992) EN 60917-2-1 : 1995 (IEC 917-2-1 : 1993) Corresponding British Standard BS 7728 : 1994 Mechunical structures for electronic equipment. Tminology BS EN 60917 Modular order for the development of mecha
10、nical struccureS for electronic equipment practices Part O : 1992 Guide for the users of IEC Publication 91 7 Part 2 : 1994 Sectional specification. Intefiace Co-onlination dimensions for ule 25 mm equipnmt practice Section 1 : 1997 Deta -fication - D.imensions for cabinets and racks Compliance with
11、 a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 34, an inside back cover and a back cover. ii O BSI 1997 STD-BSI BS EN b0917-2-2-ENGL 1997 Lb24b
12、b9 Clb07LIL8 bLT EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 6091 7-2-2 January 1996 ICs 31 -240 Descriptors: Interface co-ordination dimensions, 25 mm equipment practice. subracks, chassis, backplanes, front panels and pluein units English version Modular order for the development of mecha
13、nical structures for electronic equipment practices Part 2: Sectional specification - Interface co-ordination dimensions for the 25 mm equipment practice Section 2: Detail specification - Dimensions for subracks, chassis, backplanes, front panels and plug-in units (IEC 91 7-2-21994) Ordre modulaire
14、pour le dveloppement des structures mcaniques pour les infrastructures lectroniques Partie 2: Spcifation intermdiaire Dimensions de coordination pour les interfaces des infrastructures au pas de 25 mm Section 2: Spcification particulire Dimensions pour bacs, chssis, fonds de paniers, faces avant et
15、units enfichables (CE1 91 7-2-21994) Modulordnung fr die Entwicklung von Bauweisen fr elektronische Einrichtungen Teil 2: Strukturnorm Schnittstellen-Koordinationsmae fr die 25-mm-Bauweise Hauptabschnitt 2: Manorm Mae fr Baugruppentriiger, Einschbe, Rckplatten, Frontplatten und steckbare Baugruppen
16、(IEC 91 7-2-2: 1994) This European Standard was approved by CENELEC on 1995-1 1-28. 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 list
17、s 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 re
18、sponsibility 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, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembour
19、g, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Sscretariat: rue de Stassart 35, B - 1050 Brussels
20、 1996 Copyright reserved to CENELEC members Ref. NO. EN 80917-2-21996 E STDSBSI BS EN b07L7-2-2-ENGL 1977 lb2qbb9 Ob07LiL9 55b m Page 2 EN 609 1 7-2-2: 1996 Foreword The text of the International Standard iEC 91 7-2-2:1994, prepared by SC 480, Mechanical structures for electronic equipment, of IEC T
21、C 48, Electromechanical components and mechanical structures for electronic equipment, was submitted to the formai vote and was approved by CENELEC as EN 6091 7-2-2 on 1995-1 1-28 without any modification. The following dates were fixed: - latest date by which the EN has to be implemented at nationa
22、l levei by publication of an identical national standard or by endorsement (dopl 1996-1 2-01 - latest date by which the national standards conflicting with the EN have to be withdrawn (daw) 1996-1 2-01 Annexes designated ?normative? are part of the body of the standard. in this standard, annex ZA is
23、 normative. Annex ZA has been added by CENELEC. Endorsement notice The text of the international Standard IEC 9 1 7-2-2: 1994 was approved by CENELEC as a European Standard without any modification. * * rn Page 3 EN 60917-2-2 : 1996 CONTENTS 1 scope 2 Normative references 3 Terminology . 4 Equipment
24、 arrangement 5 Dimensions 5.1 5.2 5.3 5.4 5.5 5.6 Subracks . 5.1.1 5.1.2 5.1.3 Type C subrack . 5.1.4 Chassis 5.2.1 Backplane dimensions . Internal coordination and backplane grid Front panels on cabinets or racks and dimensions for subracks and chassis mounting flanges Types of plug-in units 5.5.1
25、P type plug-in units . 5.5.2 5.5.3 5.5.4 L frame type plug-in units with front panels to accommodate P type plug-in units without front panels 5.5.5 M box type plug-in units with male guides . 5.5.6 N box type plug-in units without male guides . 5.5.7 Clearance of plug-in units in subrack . Terms. d
26、efinitions and tables of dimensions 5.6.1 Nomenclature 5.6.3 Width dimensions 5.6.4 Depth dimensions . Type A subrack. connector application with backplane . Type B subrack. connector application without backplane Backplane . P type plug-in units with injector/extractor handles K frame type plug-in
27、units to accommodate P type plug-in units . 5.6.2 Height dimensions 5 6 6 7 a a a 14 15 15 16 16 17 18 20 21 24 25 26 27 28 29 30 30 32 33 33 Figures 1 Examples of .subracks. backplanes. plug-in units and cabinet or rack front panels . Subrack dimensions for mounting plug-in units. plug-in unit guid
28、es and backplanes IO 7 2 Dimensional relationship for subrack and plug-in units 9 3a 3b Dimensions of subracks and fastening arrangement 11 STD-BSI BS EN b0917-2-2-ENGL 1997 H Lb24bb9 Ob07421 LO4 Page4 EN 60917-2-2 : 1996 3c 4 5 6 7 8 9 10 11 12 13 14 15 16 17 98 19 20 Plug-in unit guides and plug-i
29、n unit positions Optional subradc with front panels for electromagnetic interference (EMI) shielding Mounting dimensions for connectors Without backplane . Type C subrack dimensions Backpiane dimensions Relationship between reference planes and backplane grid . Mounting dimensions for rack or cabine
30、t front panels. subracks and chassis . Mounting height dimensions for rack or cabinet front panels. chassis and subrack mounting flanges . Examples of types of plug-in units . P type plug-in unit dimensions . Front panels for plug-in units . Printed board dimensions P type plug-in unit injector/extr
31、actor handle dimensions . K frame type plug-in units L frame type plug-in units M box type plug-in units . N box type plug-in units . Typical plug-in unit arrangements Annex ZA (normative) Normative references to international oublications with their corresoondina EUrODean Dublications 12 13 14 15 1
32、6 17 18 19 20 21 22 23 24 25 26 27 28 29 34 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 - Section 2: Detail specification - Dimensions for subrack
33、s, chassis, backplanes, front panels and plug-in units 1 scope This section of IEC 917-2 is a detail specification which is to be used in whole or in part in ali fields of electronics where devices and systems are designed according to the sectional specification IEC 917-2. The purpose of this publi
34、cation is the specification of dimensions which will ensure mechanical interchangeabiiy of subracks, chassis, plug-in units. backplanes and front panels. lhe sectional specification IEC 917-2 has embodied within it a number of subrack systems based on 25 mm three-dimensional modularity and the binar
35、y addaive principie for subrack heights. The dimensions in the taMes of this detail specification are based on one of the subrack systems taken from the sectional speciication IEC 917-2. However, all subrack systems within the sectional specification are valid in this detail specification, provided
36、the relation- ship between the dimensions is maintained, i.e. the dimensionat difference between the cosrdination dimensions H, W, and D, and dimensions H, etc.; MIso, etc., and O, etc., shown in tables 1 2 and 3 are to be maintained. The subrack dimensions are related to certain cabinetirack dimens
37、ions, see IEC 917-2-1. The front panel dimensions are related to the mounting dimensions of certain cabinets and racks, see IEC 917-2-1. Plug-in units are mounted in subracks. They serve as supports for electrical, electronic and mechanical components. The electrical connection between plug-in units
38、 and subracks is based on the use of connectors. All dimensions are given in millimetres and the drawings are first angle projections. STD-BSI BS EN b917-2-2-ENGL 1777 1b2GbS b07423 T7 Page 6 EN 60917-2-2 : 1996 2 Nonnatlve references The following normative documents contain provisions which, throu
39、gh reference in this text, constitute provisions of this section of IEC 917-2. At the time of publication, the ediOns indicated were valid. All normative documents are subject to revision and parties to agreements based on this section of IEC 917-2 are encouraged to investigate the possi- bility of
40、applying the most recent editions of the normative documents indicated below. Members of IEC and IS0 maintain registers of currently valid International Standards. IEC 249-2, Base materials for printed circuits - Patt 2: Specifications iEC 916: 1988, Mechanical stmctures for electronic equipment - T
41、erminobpy 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 stmctures for electronic equipment practices - Part O: Guide for the users of IEC Publication 9
42、17 IEC 917-2: 1992, Modular order for the development of mechanical structures for electmnic equipment practices - Part 2: Sectional specification - Intedace Co-ordination dimensions for the 25 mm equipment practice IEC 917-2-1: 1993, Modular order for the development of mechanical structures for el
43、ectronic equipment practices - Patt 2: Sectional specification - Interface co-onlination dimensions for the 25 mm equipment practice - Section I: Detail specification - Dimen- sions for cabinets and racks iEC 1076, Connector standards related to this 25 mm equipment practice (in preparation) 3 Termi
44、nology For the purposes of this section of IEC 91 7-2, the following terminology applies. 3.1 aperture dimensions: Dimensions used to define space between structural parts. 3.2 co-otdinatlon dlmenslon: Reference dimension used to co-ordinate mechanical interfaces, see IEC 917. 3.3 mounting pitch: Pi
45、tch used to arrange parts or assemblies in a given space. 3.3.1 mountlng pltch for cablnetslracks and subracks: . mpl = 25 mm 3.3.2 mounting pitch for subracks and plug-in units mp2= 5mm 3.3.3 mounting pitch for subracks and plug-in unlts: mp3- 2,5mm , STD-BSI BS EN bL7-2-2-ENGL Li W Lb24bb Ub742Y7L
46、3 W Page 7 EN 60917-2-2 : 1996 3.3.4 grld for backplane: mp4 10.5 mm 3.4 grd: Two-dimensional or three-dimensionsil arrangement of pitch used to co- ordinate position; see also IEC 917,6.1, modular grid. 3.5 n: integer. 3.6 reference plane: Theoretical plane without thickness or tolerance, Used to d
47、efine spaces. See IEC 917 and IEC 917-0. 4 Equlpment arrangement , Backplane Fixed connector Subrack .mounting flange subrack #JI I Fir Plug-in unit / with printed board Plug-h unit into panel M hx type a framdbox type plug-in unit plug-in unit Nbo:ty. plug-in unit Figure 1 - Examples of subracks, b
48、ackplanes, plug-in units and cabinet or rack front panels _ STD-BSI BS EN b07L7-2-2-ENGL 1777 LbEqbb7 ObO7Li25 85T i Page 8 EN 60917-2-2 : 1996 5 Dlmenslons The subrack, chassis, backplane, front panel and plug-in unit dimensions for height, width and depth have been taken from the relevant tables i
49、n IEC 917-2 (see 5.1.1.1). 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 Subracks 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 Subracks designed according to type A shall be
