1、BRITISH STANDARD Low-voltage switchgear and controlgear - Part 5-6: Control circuit devices and switching elements - DC interface for proximity sensors and switching amplifiers (NAMUR) O The European Standard EN 60947-5-6:2000 has the status of a British Standard ICs 29.130.20 BS EN 60947-5-6:2001 I
2、EC 60947-5-6:1999 O NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN 60947-5-6:2001 National foreword This British Standard is the official English language version of EN 60947-5- 6:2000. It is identical with IEC 60947-5-6:1999. The UK participation in its preparation was
3、 entrusted by Technical Committee PEU 17, Switchgear controlgear and HV-LV co-ordination, to Subcommittee PEU 171 2, Low voltage switchgear and controlgear, which has the responsibility to: This British Standard, having been prepared under the direction of the Electrotechnical Sector Committee, was
4、published under the authority of the Standards Committee and comes into effect on 15June2001 O BSI 06-2001 ISBN O 580 37438 6 - - aid enquirers to understand the text; present to the responsible internationallEuropean committee any enquiries on the interpretation, or proposals for change, and keep t
5、he UK interests informed; monitor related international and European developments and promulgate them in the UK. - A list of organizations represented on this subcommittee can be obtained on request to its secretary. From 1 January 1997, all IEC publications have the number 60000 added to the old nu
6、mber. For instance, IEC 27-1 has been renumbered as IEC 60027-1. For a period of time during the change over from one numbering system to the other, publications may contain identifiers from both systems. Cross-references Attention is drawn to the fact that CEN and CENELEC Standards normally include
7、 an annex which lists normative references to international publications with their corresponding European publications. British Standards which implement these international or European publications may be found in the BSI Standards Catalogue under the section entitled “International Standards Corr
8、espondence 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 correct application. Compliance with a British Standard does n
9、ot of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 15, and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued sin
10、ce publication Amd. No. /Date I Comments EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60947-5-6 January 2000 ICs 29.130.20 Supersedes EN 50227: 1997 English version Low-voltage switchgear and controlgear Part 5-6: Control circuit devices and switching elements DC interface for proximity sens
11、ors and switching amplifiers (NAMUR) (IEC 60947-5-6:1999) Appareillage basse tension Niederspannungsschaltgerte Partie 5-6: Appareils et lments de commutation pour circuits de commande Gleichstrom-Schnittstelle fr Interface courant continu pour capteurs de proximit et amplificateurs O Teil 5-6: Steu
12、ergerte und Schaltelemente Nherungssensoren und Schaltverstrker (NAMUR) de commutation (NAMUR) (IEC 60947-5-61999) (CE1 60947-5-6: 1 999) This European Standard was approved by CENELEC on 2000-01 -03. CENELEC members are bound to comply with the CENKENELEC Internal Regulations which stipulate the co
13、nditions 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 rnay be obtained on application to the Ce.ntral Secretariat or to any CENELEC member. This European Standard exists
14、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 are the national electrot
15、echnical committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Eiectrotechnical Standardization Comit Europen de Norm
16、alisation Electtotechnique Europisches Komitee fr Elektrotechnische Normung Centrai Secretariat: rue de Stassart 35, B - 1050 Brussels 2000 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60947-5-6:2000 E Page 2 EN 60947-5-6:2000
17、Foreword The text of document 17B/101 l/FDIS, future edition 1 of IEC 60947-5-6, prepared by SC 178, Low-voltage switchgear and controlgear, of IEC TC 17, Switchgear and controlgear, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60947-5-6 on 2000-01 -01. This Europ
18、ean Standard supersedes EN 50227: 1 997. The following dates were fixed: - latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2000-1 0-0 1 - latest date by. which the national standards conflicting with the EN
19、have to be withdrawn (daw) 2003-0 1-01 Annexes designated “normative“ are part of the body of the standard. in this standard, annex ZA is normative. Annex ZA has been added by CENELEC. Endorsement notice The text of the International Standard IEC 60947-5-6:1999 was approved by CENELEC as a European
20、Standard without any modification. Page 3 EN 60947-5-62000 CONTENTS Page Clause 1 Scope 4 2 Normative references 4 3 Definitions . 4 4 Classification . 6 5 Characteristics 7 5.1 Control input of the switching amplifier . 7 5.2 Interaction between proximity sensor and switching amplifier . 7 5.3 Cont
21、inuous characteristic . 7 5.4 Discontinuous characteristic . 7 5.5 Switching current difference . 7 5.6 Line resistance . 7 5.7 Insulation resistance . 7 6 Product information . 8 6.1 Proximity sensors . 8 6.2 Switching amplifiers 8 Normal service, mounting and transport conditions 9 7.1 Normal serv
22、ice conditions . 9 7.2 Connection identification and marking . 11 7.3 Conditions during transport and storage 11 7.4 Electromagnetic compatibility (EMC) . 11 7 8 Constructional and performance requirements 11 9 Tests 11 O 9.1 Switching amplifier 11 9.2 Proximity sensor 12 9.3 Results to be obtained
23、. 13 9.4 Verification of the electromagnetic compatibility 14 Figure 1 . Example of a continuous characteristic of a proximity sensor . 10 Figure 3 . Control input of the switching amplifier : . 12 Figure 2 . Example of a discontinuous characteristic of a proximity sensor . 10 Figure 4 . Characteris
24、tics of proximity sensor in the high impedance state . 13 Figure 5 . Characteristics of proximity sensor in the low impedance state 14 Table 1 . Classification of proximity switches 6 Table 2 . Connection and wiring identification . 11 Annex ZA (normative) Normative references to international publi
25、cations with their corresponding European publications 15 O BSI 06-2001 Page 4 EN 60947-5-6:2000 LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR - Part 5-6: Control circuit devices and switching elements - DC interface for proximity sensors and switching amplifiers (NAMUR) 1 Scope This International Standard
26、 applies to proximity sensors connected for operation by a two-wire connecting cable to the control input of a switching amplifier. The switching amplifier contains a d.c. source to supply the control circuit and is controlled by the variable internal resistance of the proximity sensor. These device
27、s can be used in an explosive atmosphere if they also comply with IEC 60079-1 1. NOTE These devices have been defined by the German organization “NormenausschuR fr MeR- und Regelungstechnik (NAMUR)” (Office for Standardization of Measurement and Regulation Techniques). 2 Normative references The fol
28、lowing normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this Internation
29、al Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of IEC and IS0 maintain registers of currently valid Internatio
30、nal Standards. IEC 60079-1 1 : 1999, Electrical apparatus for explosive gas atmospheres - Part II: Intrinsic safety “i” IEC 60947-1 :I 999, Low-voltage switchgear and controlgear - Part 1: General rules IEC 60947-5-2: 1999, Low-voltage switchgear and controlgear - Part 5-2: Control circuit devices a
31、nd switching elements - Proximity switches 3 Definitions For the purpose of this International Standard the following definitions apply. 3.1 proximity sensor device which converts the travel of an influencing body relative to it into an output signal NOTE 1 The proximity sensor is preferably contact
32、less (e.g. inductive, capacitive, magnetic, photoelectric). NOTE 2 The proximity sensor may be operated with or without mechanical contact. 3.2 switching amplifier device which converts the signal from the proximity sensor presented at the control input into a binary output signal which may be produ
33、ced e.g. by an electromagnetic relay or a semi- conductor switching element O BSI 06-2001 3.3 control circuit system comprising the proximity sensor, the control input of the switching amplifier and the two-wire connecting cable 3.4 output signal of the proximity sensor output current as a function
34、of the variable internal resistance 3.5 distancelcurrent characteristic of the proximity sensor relationship of the output signal (the current value) in the steady state to the distance of the influencing body relative to the sensor. Both continuous and discontinuous characteristics are permitted (s
35、ee 5.3 and 5.4, and figures 1 and 2) 3.6 actuating range (Ai,) range defined by four straight lines in the current-voltage switching amplifier to which is assigned a switching function graph of the control input of the switching amplifier. of the There are three actuating ranges covered by the curre
36、nt-voltage characteristic of the control input (see figure 3, a, b and d) 3.7 slope change in the continuous characteristic of a proximity sensor in the actuating range (AI,) (see figure 1) NOTE The slope can assume different values within the control span. 3.8 maximum-operating frequency of the pro
37、ximity sensor maximum switching frequency achieved through periodic influencing at which the limits of the actuating range (AI,) are reached (see figures 1 and 2) 3.9 switching current difference change in control current within the actuating range (AI,) at which the switching amplifier changes its
38、output signal (see figures 1, 2 and 3) e 3.10 switching travel difference travel of the influencing body which changes the output signal of the switching amplifier. With a discontinuous characteristic of the proximity sensor, the switching travel difference is identical to the control span As i .I 1
39、 : L. 3.1 1 line resistance effective resistance of the two-wire connecting cable between the switching amplifier and the proximity sensor O BSI 06-2001 Page 6 EN 60947-6-6:2000 IThise is an extension of table 1 of IEC 3.12 insulation resistance effective resistance between the wires of the two-wire
40、 cable connecting the switching amplifier to the proximity sensor 60947-5-2. 3.13 time delay before availability (tv) time between the switching on of the supply voltage and the instant at which the proximity sensor becomes ready to operate correctly 3.14 control span (As) travel of the influencing
41、body in which the actuating range (A/,) is operative. With a discontinuous characteristic, the control span is identical to the switching travel difference (see figures I and 2) 4 Classification Proximity switches are classified according to various general characteristics as shown in table 1. The a
42、bility to fulfil the requirements of the present standard is designated by a capital letter N placed in the eighth position. Table 1 - Classification of proximity switches 1 st position 1 1 digit SENSING MEANS I = inductive C = capacitive U = ultrasonic D = diffuse reflective photoelectric R= retror
43、eflective photoelectric T = through beam photoelectric 2nd position 1 digit MECHANICAL INSTALLATION 1 = embeddable 2 = non- embeddable 3 = either 3rd position 3 digits CONSTRUCT. FORM AND SIZE FORM (1 capital letter) A = cylindrical threaded barrel B = cylindrical smooth barrel C = rectangular with
44、square cross-section D = rectangular with rectangular cross-section SIZE (2 numbers) for diameter or side length 4th position 1 digit SWITCH I NG ELEMENT FUNCTION A = NO (make) B = NC (break) P= programmable by user S = other 5th position 1 digit TYPE OF OUTPUT D = 2 terminai d.c. S = other 6th posi
45、tion 1 digit METHOD OF CONNECTION 1 = integral leads 2 = plug-in 3 = screw 9 = other Bth position 1 digit NAMUR FUNCTION N = NAMUR function O BSI 06-2001 Page 7 EN 60947-5-6:2000 5 Characteristics 5.1 Control input of the switching amplifier The binary output signal of the switching amplifier shall
46、only change when the operating point of the control circuit is within the relevant actuating range (see figure 3). 5.2 Interaction between proximity sensor and switching amplifier The proximity sensor shall be designed in such a way, that when actuated by the intended influence the current-voltage c
47、haracteristic reliably reaches the “high impedance” and “low impedance” states. The “high impedance” state is shown in figure 4 and the “low impedance” state in figure 5. NOTE The limits for the permitted characteristic range of the proximity sensor and the switching amplifier have been selected so
48、as to provide a safety margin. 0 5.3 Continuous characteristic Within the actuating range (AII): a) the output signal of the proximity sensor shall be adjustable; b) the slope of the characteristic shall be either positive or negative and there shall be no hysteresis (see the example in figure 1). 5
49、.4 Discontinuous characteristic Within the actuating range (Ail): a) the output signal of the proximity sensor shall not be adjustable, and b) the characteristic shall have hysteresis (see the example in figure 2). 5.5 Switching current difference The preferred value of the switching current difference is 0,2 mA. The preferred position of the switching current difference is the centre of the actuating range (AI,). 0 5.6 Line resistance The line resistance shall not exceed 50 R. i 5.7 Insulation resistance The insulation resistance shall not be less than 1 MQ. O BSI 06-
