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1 EN V2.1.1 ( ) European Standard (Telecommunications series) Environmental Engineering (EE); European telecommunication standard for equipment practice; Part 4: Engineering requirements for subracks in miscellaneous racks and cabinets
2 2 EN V2.1.1 ( ) Reference REN/EE-TMG006 Keywords equipment practice, environment, rack 650 Route des Lucioles F Sophia Antipolis Cedex - FRANCE Tel.: Fax: Siret N NAF 742 C Association à but non lucratif enregistrée à la Sous-Préfecture de Grasse (06) N 7803/88 Important notice Individual copies of the present document can be downloaded from: The present document may be made available in more than one electronic version or in print. In any case of existing or perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF). In case of dispute, the reference shall be the printing on printers of the PDF version kept on a specific network drive within Secretariat. Users of the present document should be aware that the document may be subject to revision or change of status. Information on the current status of this and other documents is available at If you find errors in the present document, please send your comment to one of the following services: Copyright Notification No part may be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute All rights reserved. DECT TM, PLUGTESTS TM and UMTS TM are Trade Marks of registered for the benefit of its Members. TIPHON TM and the TIPHON logo are Trade Marks currently being registered by for the benefit of its Members. 3GPP TM is a Trade Mark of registered for the benefit of its Members and of the 3GPP Organizational Partners.
3 3 EN V2.1.1 ( ) Contents Intellectual Property Rights...4 Foreword Scope References Dimensions for subracks Accessibility Weight Unequipped subrack Equipped subrack Electromagnetic compatibility and electrostatic discharge requirements...6 Annex A (informative): Illustrative figures...8 Annex B (informative): Bibliography...10 History...11
4 4 EN V2.1.1 ( ) Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to. The information pertaining to these essential IPRs, if any, is publicly available for members and non-members, and can be found in SR : "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to in respect of standards", which is available from the Secretariat. Latest updates are available on the Web server ( Pursuant to the IPR Policy, no investigation, including IPR searches, has been carried out by. No guarantee can be given as to the existence of other IPRs not referenced in SR (or the updates on the Web server) which are, or may be, or may become, essential to the present document. Foreword This European Standard (Telecommunications series) has been produced by Technical Committee Environmental Engineering (EE). The present document is part 4 of a multi-part deliverable aimed at setting out, on a common basis, the engineering requirements for telecommunication practice, for housing equipment forming part of a public telecommunications network. EN [2] is a general introduction and explains the terminology used. EN [3] specifies the engineering requirements for racks and cabinets and EN [4] specifies the engineering requirements for miscellaneous racks and cabinets. EN [5] covers the preferred thermal management solutions for subracks, racks/cabinets and miscellaneous racks/cabinets installed indoors in restricted access locations, for the removal of heat dissipated by one or more subracks in an rack complying to the requirements of this multi-part standard. The present document specifies the engineering requirements for subracks mounted in miscellaneous racks and cabinets. The present document applies to all telecommunications equipment forming part of the public telecommunications network. Illustrative figures are contained in annex A. The present document is part 4 of a multi-part deliverable. Full details of the entire series can be found in part 1 [2]. National transposition dates Date of adoption of this EN: 24 September 2004 Date of latest announcement of this EN (doa): 31 December 2004 Date of latest publication of new National Standard or endorsement of this EN (dop/e): 30 June 2005 Date of withdrawal of any conflicting National Standard (dow): 30 June 2005
5 5 EN V2.1.1 ( ) 1 Scope The present document details requirements for subracks for use in miscellaneous racks/cabinets, as described in EN [4]. The subrack will normally be supplied as a fully assembled structure, unequipped, partially equipped or fully equipped with plug-in units, etc. 2 References The following documents contain provisions which, through reference in this text, constitute provisions of the present document. References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For a specific reference, subsequent revisions do not apply. For a non-specific reference, the latest version applies. Referenced documents which are not found to be publicly available in the expected location might be found at [1] Council Directive 89/336/EEC of 3 May 1989 on the approximation of the laws of the Member States relating to electromagnetic compatibility. [2] EN : "Environmental Engineering (EE); European telecommunication standard for equipment practice; Part 1: Introduction and terminology". [3] EN : "Environmental Engineering (EE); European telecommunication standard for equipment practice; Part 2: Engineering requirements for racks and cabinets". [4] EN : "Environmental Engineering (EE); European telecommunication standard for equipment practice; Part 3: Engineering requirements for miscellaneous racks and cabinets". [5] EN : "Environmental Engineering (EE); European telecommunication standard for equipment practice; Part 5: Thermal management". [6] IEC publication : "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 subracks, chassis, backplanes, front panels and plug-in units". 3 Dimensions for subracks The dimensions height H, width W and depth D1 and D2 of the equipped subrack shall include all plug-in units, switches, lamps, cooling fans, connectors, etc. For a table of dimensions, see table 1 and refer to figures A.1 and A.2.
6 6 EN V2.1.1 ( ) 4 Accessibility Subracks fitting in a miscellaneous rack/cabinet of depth 300 mm shall require access only from the front, so that they can be placed in miscellaneous racks/cabinets which are back to back or against a wall. 5 Weight 5.1 Unequipped subrack Unequipped subracks shall have a maximum weight of 18 kg for safe handling. Supply of subracks exceeding 18 kg, if requested, shall be agreed between the supplier and user. 5.2 Equipped subrack On demand, the supplier shall provide administrations, operators or customers with the total weight of the equipped subrack to enable the fully equipped miscellaneous rack/cabinet weight to be determined for telecommunications centres and customer site floor loading calculations. 6 Electromagnetic compatibility and electrostatic discharge requirements Subracks to be installed in miscellaneous racks/cabinets must take account of the EEC Council Directive on the approximation of laws of the Member States relating to electromagnetic compatibility (Directive 89/336/EEC [1]). In accordance with the terms of this Directive, due regard shall be taken of the appropriate existing and emerging standards concerning electromagnetic compatibility phenomena. NOTE: See also figures A.1 and A.2 where dimensions are in mm.
7 7 EN V2.1.1 ( ) Table 1 Dimensions for subracks (see note 2) mounted in miscellaneous racks/cabinets H = height C n x 25 W1 = overall width C 535 (see note 1) 535 over flanges W2 = width C W3 = mounting A 515 (see note 1) 515 centre distance R = mounting C 12,5 + n x 25 12,5 + n x 25 position S = mounting pitch A n x 25 n x 25 D1 = mounting C rack 300 deep rack 600 deep rack 300 deep rack 600 deep depth (front) D2 = mounting depth (rear) C NOTE 1: Subracks with dimensions W1 = 485 and W3 = 465 may be fitted into miscellaneous racks (EN [4]) by the use of adaptors. NOTE 2: A = Actual dimension. Tolerances needed for W3 and S are specified in IEC [6]. C = Coordination dimension. NOTE 3: n = 0, 1, 2, 3, etc. (the value of n can be different for H, R and S). Definition: A coordination dimension is a reference dimension used to coordinate mechanical interfaces. This is not a manufacturing dimension with a tolerance. An aperture dimension is a special coordination dimension for a usable space between features. An actual outside dimension corresponding to a coordination dimension can only decrease. An actual inside dimension corresponding to an aperture dimension can only increase.
8 8 EN V2.1.1 ( ) Annex A (informative): Illustrative figures Figure A.1: Subrack
9 9 EN V2.1.1 ( ) Figure A.2: Subrack
10 10 EN V2.1.1 ( ) Annex B (informative): Bibliography EN : "Environmental Engineering (EE); Environmental conditions and environmental tests for telecommunications equipment".
11 11 EN V2.1.1 ( ) History Document history Edition 1 January 1994 Publication as ETS V2.1.0 May 2004 One-step Approval Procedure OAP : to V2.1.1 September 2004 Publication
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