1、BRITISH STANDARD BS ISO 7588-3:1998 Road vehicles Electrical/electronic switching devices Part 3: Microrelays ICS 43.040.10BS ISO7588-3:1998 This British Standard, having been prepared under the direction of the Engineering Sector Committee, was published under the authority of the Standards Committ
2、ee and comes into effect on 15February 1999 BSI 06-1999 ISBN 0 580 30948 7 National foreword This British Standard reproduces verbatim ISO7588-3:1998 and implements it as the UK national standard. The UK participation in its preparation was entrusted to Technical Committee AUE/16, Electrical and ele
3、ctronic equipment, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developme
4、nts and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue
5、 under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their corre
6、ct application. Compliance with 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 ISO title page, page ii, pages1 to4 and a back cover. This standard has been updated (see c
7、opyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBS ISO7588-3:1998 BSI 06-1999 i Contents Page National foreword Inside front cover Foreword ii 1 Scope 1 2 Norma
8、tive references 1 3 Definitions 1 4 Dimensions and other requirements 1 5 Functional allocation of the terminals 3 6 Designation 3 Annex A (informative) Dimensions of socket apertures 4 Figure 1 1 Figure 2 2 Figure 3 2 Figure A.1 4 Table 1 3ii blankBS ISO7588-3:1998 ii BSI 06-1999 Foreword ISO (the
9、International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee
10、 has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnic
11、al standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least75% of the member bodies casting a vote. International Standard ISO7588-3 was prepared by Techni
12、cal Committee ISO/TC22, Road vehicles, Subcommittee SC3, Electrical and electronic equipment. ISO7588 consists of the following parts, under the general title Road vehicles Electrical/electronic switching devices: Part 1: Relays and flashers; Part 2: Electronic devices; Part 3: Microrelays. Annex A
13、of this part of ISO7588 is for information only. Descriptors: Road vehicles, motor vehicles, electrical equipment, electric relays, subminiature relays, electric terminals, electric contacts, form specifications, dimensions, overall dimensions, position (location), contact allocation, designation.BS
14、 ISO7588-3:1998 BSI 06-1999 1 1 Scope This part of ISO7588 specifies dimensional characteristics and the functional allocation of microrelay terminals intended for road vehicles. Annex A gives additional information on the dimensions of socket apertures. 2 Normative references The following standard
15、s contain provisions which, through reference in this text, constitute provisions of this part of ISO7588. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of ISO7588 are encouraged to investigate the p
16、ossibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 8092-1:1996, Road vehicles Connections for on-board electrical wiring harnesses Part 1: Tabs for single-pole connections Dimensi
17、ons and specific requirements. ISO 8092-2:, Road vehicles Connections for on-board electrical wiring harnesses Part 2: Definitions, test methods and general performance requirements 1) . 3 Definitions For the purposes of this part of ISO7588, the definitions given in ISO8092-2 apply. 4 Dimensions an
18、d other requirements 4.1 General Dimensional characteristics and other requirements are specified in4.2 to4.4. NOTEAll corresponding dimensions also apply if less than five tabs are fitted. The dimensions of socket apertures given inAnnex A are for information only. The functional allocation of rela
19、y terminals is specified inclause5. 4.2 Positioning zones of the tabs and socket apertures 4.2.1 Location of tabs and apertures True position SeeFigure 1. 4.2.2 Dimensional limits of the tabs SeeFigure 2. The tabs shall be in accordance with ISO8092-1, sizes6,3 0,8 and4,8 0,8 respectively, and shall
20、 not have shoulders. 1) To be published. (Revision ofISO8092-2:1996) Figure 1 BS ISO7588-3:1998 2 BSI 06-1999 4.3 Overall dimensions and other requirements for microrelays SeeFigure 3. Configurations other than rectangular are permitted, provided they lie within the specified area. However, in all c
21、ases the outside contour shall lie within the maximum dimensions given inFigure 3. 4.4 Other requirements for sockets 4.4.1 Apertures at the entering plane shall be in accordance withFigure 1 and shall accept tabs to the maximum limits. 4.4.2 In order to avoid the need for excessive withdrawal force
22、, it is recommended that the female connectors in the socket should not incorporate detents. Figure 2 Figure 3 BS ISO7588-3:1998 BSI 06-1999 3 5 Functional allocation of the terminals The terminal positions are shown inTable 1 from the terminal connection side. Table 1 6 Designation Microrelays in a
23、ccordance with this part of ISO 7588 shall be designated as shown in the following example. EXAMPLE Type Arrangement of the terminals a Wiring diagram (basic types) a Functional allocation of the terminals a M1 (Break contact) 1 = Coil plus 2 = Coil minus 3 = Switching contact input (moving contact)
24、 4 = Switchingcontact output (break contact) M2 (Make contact) 1 = Coil plus 2 = Coil minus 3 = Switching contact input (moving contact) 5 = Switchingcontact output M3 (Changeover contact) 1 = Coil plus 2 = Coil minus 3 = Switching contact input (moving contact) 4 = Switching contact output (break c
25、ontact) 5 = Switching contact output (make contact) a Other terminal designations may be used if the arrangement and attribution of functions comply with this specification.BS ISO7588-3:1998 4 BSI 06-1999 Annex A (informative) Dimensions of socket apertures A.1 General This annex is for information
26、only, pending completion of current ISO work on dimensions of socket apertures. A definitive specification may be given in a future edition of this part of ISO7588. A.2 Dimensions of socket apertures Socket apertures should accommodate the following tab positioning zones (seeFigure A.1): at entering
27、 plane:7,3mm 1,6mm for tab size6,3 0,8; 5,8mm 1,6mm for tab size4,8 0,8; at throat: 6,7mm 1,0 mm for tab size 6,3 0,8; 5,2 mm 1,0 mm for tab size 4,8 0,8. Figure A.1 blankBS ISO 7588-3:1998 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body r
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