1、- BSI BS*EN*b0937- 2 94 E 3b24bb9 0433063 49Y BRITISH STANDARD 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 The European Standard EN 60917-2 : 1994 :
2、 1994 has the status of a British Standard UDC 621.3.049.7 . 62-772.4 : 62-112.5/.6 : 621.38.39 BS EN 60917-2 : 1994 IEC 917-2 : 1992 BS EN 60917-2 : 1994 Amd. No. Date Cooperating organizations Text affected The European Committee for Electrotechnical Standardization (CENELEC), under whose supervis
3、ion this European Standard was prepared, comprises the national committees of the following countries: Austria Belgium Denmark Finland France Germany Greece Iceland Ireland Italy Luxembourg Netherlands Norway Portugal Spain Sweden Switzerland United Kingdom This British Standard, having been prepare
4、d under the direction of the Electrotechnical Sector Board, was published under the authority of the Standards Board and comes into effect on 15 November 1994 O BSI 1994 I I The foliowing BSI references relate to the work on this standard: Committee reference ECW21 Special announcement in BSI News,
5、November 1992 ISBN O 680 23496 7 BSI BS*EN*60717- 2 74 = 1624669 0433063 267 BS EN 60917-2 : 1994 Contents Cooperating organizations National foreword Page Inside front cover i Foreword 2 Text Of EN 60917-2 : 1994 3 National annex NA (informative) Committees responsible Inside back cover National an
6、nex NB (informative) Cross-references Inside back cover National foreword This British Standard has been prepared under the direction of the Electrotechnical Sector Board and is the English language version of EN 60917-2 : 1994, Modular order for the development of mechanical structures for electron
7、ic equiprnent practices Part 2 : Sectional specgication - Interfme co-ordination dimensions for the 25 mm equiprnent practice, published by the European Committee for Electrotechnical Standardization (CENELEC). It is identical with IEC 917-2 : 1992 published by the International Electrotechnical Com
8、mission (IEC). Compliance with a British Standard does not of itself confer immunity from legal obligations. i BSI BS*EN*bOSL7- 2 94 Lb24bb9 0433064 LT3 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60917-2 June 1994 UDC 62 1.3.049.7: 62-772.462- 112.5/.6:62 1.38/.39 Descriptors: Electronic e
9、quipment, modular order, dimensional compatibility, interface co-ordination dimensions for the 25 mm equipment practice English version Modular order for the development of mechanical structures for electronic equipment practices Part 2 : Sectional specification - Interface co-ordination dimensions
10、for the 25 mm equipment practice (IEC 917-2 : 1992) Ordre modulaire pour le dveloppement des structures mechaniques pour les infrastructures lectroniques Teil 2: Strukturnorm Partie 2: Spcification intermdiaire - Dimensions de coordination pour les de 25 mm Modulordnung fr die Entwicklung von Bauwei
11、sen fr elektronische Einrichtungen Schnittstellen-Koordinationsmape fr die 2 5-mm-Bauweise interfaces des infrastructures au pas (IEC 917-2 1992) (CE1 917-2 : 1992) This European Standard was approved by CENELEC on 1994-03-08. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulat
12、ions 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
13、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
14、are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europe
15、n de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels O 1994 Copyright reserved to CENELEC members Ref. No. EN 60917-2 : 1994 E Previous page is blank BSI BS*EN*bOSL7- 2 94 Lb24bb9 04330b5 03T = Page 2 EN 60917-2
16、 : 1994 Foreword The CENELEC questionnaire procedure, performed for finding out whether or not the international standard IEC 917-2: 1992 could be accepted without textual changes, has shown that no common modifications were necessary for the acceptance as a European Standard. The reference document
17、 was submitted to the CENELEC members for formal vote and was approved by CENELEC as EN 60917-2 on 8 March 1994. The following dates were fixed: - latest date of publication of an identical national - latest date of withdrawal of conflicting national standard (dop) 1995-03- 15 standards (dow) 1995-0
18、3-15 For products which have complied with the relevant national standard before 1995-03-15, as shown by the manufacturer or by a certification body, this previous standard may continue to apply for production until 2000-03-15. Annexes designated normative are part of the body of the standard. In th
19、is standard, annex ZA is normative. BSI BS*EN*b0917- 2 94 3624667 0433066 T7b Page 3 EN 60917-2 : 1994 CONTENTS page INTRODUCTION 4 Clause 1 2 3 4 5 6 7 8 9 10 11 Scope and object 5 6 Normative references . Terminology . 6 3.1 Special word usage 6 Structuring . 7 3.2 Definitions . 6 Arrangement of t
20、he equipment practice 8 Coordination dimensions for cabinets and racks . 1 0 6.1 Dimensioning of pitches . 1 0 6.2 Coordination dimensions 11 6.2.1 Height dimensions (cabinets and racks) . 1 2 6.2.2 Width dimensions (cabinets and racks) 1 2 6.2.3 Depth dimensions (cabinets and racks) 1 3 6.3 Selecti
21、on of co-ordination dimensions . I 4 Co-ordination dimensions for subracks . 1 4 7.1 HeigM dimensions (subracks) . 1 5 7.2 Width dimensions (subracks) 1 6 7.3 Depth dimensions (subracks) . 1 6 Chassis . 1 7 Plug-in units . 1 7 Printed board dimensions . 1 7 Backplane dimensions . 1 7 Annex ZA (norma
22、tive) Other international publications quoted in this standard with the references of the relevant European publications 18 BSI BS*EN*bOSL7- 2 94 = Lb24bbS 0433067 302 Page 4 EN 60917-2 1994 INTRODUCTION This part of IEC 917 is in accordance with the rules of the modular order determined in IEC 917,
23、 which is based on IEC Guide 103. This part of IEC 917 specifies the co-ordination dimensions of a metric equipment practice containing a range of interface dimensions for cabinets, racks, subracks and chassis so that dimensional compatibility can be achieved where cabinets, racks, subracks and chas
24、sis of standard height, width and depth are installed in electronic equipment. Page 5 EN 60917-2 : 1994 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
25、1 Scope and object This part of IEC 917 may be applied to all fieldsof electronics in which equipment and installations with a modular design are used. The object of this part of IEC 917 is to define a sectional specification for the mechanical structure of a 25 mm equipment practice to provide for
26、dimensional compatibility at mechanical interfaces with related engineering applications, e.g. plug-in units, printed boards, components, instrumentation, furniture, rooms, buildings, etc. It specifies the co-ordination dimensions and pitches for cabinets, racks, subracks and chassis of all types us
27、ed for electronic equipment in, for example industrial electronics, information technology, measurement and control systems and communications. The chosen co-ordination dimensions for the mechanical structure for heights, widths and depths, lie within a homogeneous, ,metric modular three-dimensional
28、 grid as specified in IEC 917. In this part of IEC 917, the mounting pitches 25 mm and 2,5 mm have been used as a base to determine the interface co-ordination dimensions for the electronic equipment practice. This creates the optimum conditions for the application of computer-aided methods througho
29、ut design and manufacture such as, for instance, computer-aided planning, development, manufacturing, testing and installation. The cabinets and racks in this part of IEC 917 represent a specific structural form which takes into consideration for instance the installation of subracks and chassis. Th
30、e determined interface co-ordination dimensions for the overall outside and aperture dimensions of subracks provide space for independently created plug-in units to be installed. These plug-in unit dimensions shall follow the rules of IEC 917-0 and IEC 917 and are to be determined in detail specific
31、ations. The connector system used (03; 1,O; 2,O; 2,5 mm, etc. connector grid) and the special application requirements are to be determined in associated detail specifications. Further standards may be used in conjunction with this part of IEC 917: IEC 297-1 : 1986, Dimensions of mechanical structur
32、es of the 482,6 rnm (19 inch) series - Patt 1: Panels and racks. IEC 297-2: 1982, Dimensions of mechanical sfructures of the 482,6 mm (19 inch) series - Part 2: Cabinets and pitches of rack structures, BSI BS*EN*b09L7- 2 94 = lb24bb9 04330b9 785 Page 6 EN 60917-2 : 1994 2 Normatlve references The fo
33、llowing normative documents contain provisions which, through reference in this text, constitute provisions of this part of IEC 917. At the time of publication, the editions indicated were valid. All normative documents are subject to revision, and parties to agreements based on this part of IEC 917
34、 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. Members of IEC and IS0 maintain registers of currently valid International Standards. IEC 297-3: 1984, Dimensions of mechanical structures of the 482,6 mm (19 in) series -
35、Part 3: Subracks and associated plug-in units. IEC 91 6: 1988, Mechanical structlres for electronic equipment. Terminology. IEC 91 7: 1988, Modular order for the development of mechanical structures for electronic equipment practices. IEC 91 7-0: 1989, Modular order for the development of mechanical
36、 structures for electronic equipment practices - Part O: Guide for the users of Publication IEC 9 1 7. 3 Terminology The terms and definitions specified in IEC 916 and IEC 917 have been used in this part of IEC 917. In addition, the following shall apply. 3.1 Special word usage - Shall: key word ind
37、icates a mandatory requirement. - Should: key word indicates flexibility of choice with a strong preference - May: implementation. key word indicates flexibility of choice with no implied preference. 3.2 Definitions aperture dimension: Usable space between features. co-ordination dimension: Referenc
38、e dimension used to co-ordinate mechanical interfaces (see IEC 917). mounting pitch: Pitch used to arrange parts or assemblies in a given space. n: Multiplier having integer values of range continuing 1, 2, 3.4, . reference plane: Theoretical plane having no thickness or tolerance, used to separate
39、space. (see IEC 917 and IEC 917-0). - Stacking: placing cabinets or racks on top of one another in a given height. - Pitch dimensions P: co-ordination dimensions for the height, width and depth of cabinets or racks used to determine the mechanical interfaces in the case of suite arrangement or of st
40、acking of cabinets or racks (see figure 4). BSI BS*EN*b09L7- 2 94 Lb24bb9 0433070 4T7 Page 7 EN 60917-2 : 1994 4 Structuring The 25 mm equipment practice provides four levels of structure which fit into one another by means of Co-ordination dimensions, see figure 1 and IEC 917. Level 4 Enclosures Le
41、vel 3 / Subracks and chassis- Level 2 Plug-io units Piece parts IEC Wi9.2 Figure 1 - Structure levels of the equipment practice BSI BS*EN*bOS37- 2 94 Lb24669 0433073 333 page 8 EN 60917-2 : 1994 5 Arrangement of the equipment practice Plug-in units, subracks and enclosures are not required to corres
42、pond precisely to the illustrations, they are only required to comply with the Co-ordination dimensions specified in the following clauses. Box type plug-in unit Plug-in unit 2 - Backplane IEC the use of grids refers to IEC 917-0 and IEC 917. Figure 3 - Principle of using interface co-ordination dim
43、ensions in conjunction with the arrangement of the equipment practice BSI BSXEN*b0917- 2 94 I1624669 0433073 Lob Page 10 EN 60917-2 : 1994 6 Co-ordination dimensions for cabinets and racks Index C is used to indicate cabinet and rack specific dimensioning. 6.1 Dimensioning of pitches The pitch dimen
44、sions in suite or stack arrangements of cabinets and racks are equal to the outside Co-ordination dimensions of cabinets and racks. CH Pitch dimension for cabinet height PCW Pitch dimension for cabinet width PCD Pitch dimension for cabinet depth The boundary reference for the pitch dimensions height
45、 PcH, width Pcw and depth Pc, shall be strictly observed, .e. screws, controls, etc. shall not project beyond the pitch planes associated with the pitch dimensions (see figure 4). Additional equipment / 1 r X“ c -3- ,w, /- IDC 6um Figure 4 - Outside co-ordination dimensions and pitches for cabinets
46、and racks BSI BS*EN*b0917- 2 94 1624667 0433074 042 Page 11 EN 60917-2 : 1994 6.2 Co-ordination dimensions Additional equipment Cabinet or rack Height f 7- +- I i: 20 -* Reference 7. piane . Reference IEC W92 Aperture volume for installing e.g. Facto: n for the mounting 0 pitch 25 mm. n = integer -D
47、- First angle projection NOTE - If Dc2 and Dc3 are used on cabinets and racks, then Dc, = D,. Figure 5 - Co-ordination dimensions for height, width and depth of cabinets and racks BSI BS*EN*b0917- 2 94 m Lb24669 0433075 T89 m U, 400 500 600 800 900 1 000 1 200 U, 150 250 350 550 650 750 950 Page 12
48、EN 60917-2 : 1994 1 400 1 500 1 600 1 700 1 800 2 O00 2 200 2 400 2 600 1 150 1250 1350 1450 1 550 1 750 1950 2 150 2350 6.2.1 Height dimensions (cabinets and racks) The height dimensions H, include covers, feet, castors, etc. H,: height of cabinet or rack, Hc = n x 25 Hc,: minimum aperture height f
49、or installing for instance subracks, in the cabinet or rack, H, = H, - (i0 x 25) (see note in Table 1) resulting total height of cabinet or rack including additional equipment, HCT = nx 25 HC+ Table I - Dimensions in millimetres The outside co-ordination dimensions H, for cabinets or racks are mainly taken from 6.3, table I of IEC 917. +ic is also equal to PCH. The values of H, are derived from 6.3, table I of IEC 91 7 using preferred Co-ordination dimensions and/or integer multiples of the mounting pitch 25 mm (see 4.3 of IEC 917-0). NOTE -
