1、BRITISH STANDARDBS EN 574:1996 +A1:2008Safety of machinery Two-hand control devices Functional aspects Principles for designICS 13.110g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g
2、50g51g60g53g44g42g43g55g3g47g36g58BS EN 574:1996+A1:2008This British Standard was published under the authority of the Standards Board and comes into effect on 15 March 1997 BSI 2009ISBN 978 0 580 60964 0National forewordThis British Standard is the UK implementation of EN 574:1996+A1:2008. It super
3、sedes BS EN 574:1996, which is withdrawn. The start and finish of text introduced or altered by amendment is indicated in the text by tags. Tags indicating changes to CEN text carry the number of the CEN amendment. For example, text altered by CEN amendment A1 is indicated by !“.The UK participation
4、 in its preparation was entrusted to Technical Committee MCE/3, Safeguarding of machinery. A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible
5、for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.Amendments/corrigenda issued since publicationDate Comments28 February 2009 Implementation of CEN amendment A1:2008and alignment of BSI and CEN publication dates EUROPEAN STANDARD NORME EUROP
6、ENNE EUROPISCHE NORM EN 574:1996+A1 June 2008 ICS 13.110 Supersedes EN 574:1996 English Version Safety of machinery - Two-hand control devices - Functional aspects - Principles for design Scurit des machines - Dispositifs de commande bimanuelle - Aspects fonctionnels - Principes de conception Sicher
7、heit von Maschinen - Zweihandschaltungen - Funktionelle Aspekte - Gestaltungsleitstze This European Standard was approved by CEN on 20 November 1996 and includes Amendment 1 approved by CEN on 18 May 2008. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the
8、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 CEN Management Centre or to any CEN member. This European Standard exists in
9、 three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions. CEN members are the national standards bodies
10、 of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROP
11、EAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2008 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 574:1996+A1:2008: EEN 574:1
12、996+A1:2008 (E) 2 Contents Page Foreword3 Introduction .4 1 Scope 4 2 Normative references 5 3 Definitions 5 4 Types of two-hand control devices and their selection 7 5 Characteristics of safety functions9 6 Requirements related to categories of control.10 7 Use of programmable electronic systems 11
13、 8 Prevention of accidental actuation and of defeat.12 9 General requirements14 10 Verification .16 11 Marking .20 12 Information for installation, use and maintenance 21 Annex A (normative) Measurement tests for the prevention of defeat23 Annex B (informative) Use of categories (according to EN 954
14、-1:1996) in types of two-hand control devices.28 Annex ZA (informative) !Relationship between this European Standard and the Essential Requirements of EU Directive 98/37/EC“.29 Annex ZB (informative) !Relationship between this European Standard and the Essential Requirements of EU Directive 2006/42/
15、EC“.30 Bibliography 31 BS EN 574:1996+A1:2008EN 574:1996+A1:2008 (E) 3 Foreword This document (EN 574:1996+A1:2008) has been prepared by Technical Committee CEN/TC 114 “Safety of machinery”, the Secretariat of which is held by DIN. This European Standard shall be given the status of a national stand
16、ard, either by publication of an identical text or by endorsement, at the latest by December 2008, and conflicting national standards shall be withdrawn at the latest by December 2008. This document includes Amendment 1, approved by CEN on 2008-05-18. This document supersedes EN 574:1996. The start
17、and finish of text introduced or altered by amendment is indicated in the text by tags ! “. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). !For relationship with
18、EU Directive(s), see informative Annexes ZA and ZB, which are integral parts of this document.“ This standard is a type B standard in the structure of A-/B-/C-standards as defined in EN 292. Annex A of this standard is normative, whereas annexes B and C are informative. According to the CEN/CENELEC
19、Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg
20、, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. BS EN 574:1996+A1:2008EN 574:1996+A1:2008 (E) 4 Introduction This standard has been prepared to be a type B standard in the sense of the Machinery Directive (89/392/EWG) and as
21、sociated EFTA regulations. A two-hand control device is a safety device (safety component). It provides a measure of protection for the operator against reaching danger zones during hazardous situations by locating the control actuating devices in a specific position. For hand held machinery it shou
22、ld be taken into consideration that the danger zone is not stationary. The selection of a two-hand control device as an appropriate safety device will depend upon the risk assessment made by designers, standard makers and others in accordance with EN 292-1 and EN 1050. The definition of a two-hand c
23、ontrol device is given in 3.1 and takes precedence over the definition in 3.23.4 of EN 292-1:1991. In some arrangements enabling devices (see 3.23.2 of EN 292-1:1991) and/or hold-to-run devices (see 3.23.3 of EN 292-1:1991) may comply with the definition of a two-hand control device in this standard
24、. Additionally, some special control devices - such as teach pendants for robots and some crane controls require the use of two hands and can comply with the definition a two-hand control device in this standard. 1 Scope This standard specifies the safety requirements of a two-hand control device an
25、d its logic unit as defined in 3.1. This standard describes the main characteristics of two-hand control devices for the achievement of safety and sets out combinations of functional characteristics for three types. This standard does not apply to devices intended to be used as enabling devices, hol
26、d to run devices and as special control devices. This standard does not specify with which machines two-hand control devices shall be used. It also does not specify which types of two-hand-control device shall be used. Moreover it does not specify the distance between the two-hand control device and
27、 the danger zone (see 9.8). The standard provides requirements and guidance on the design and selection (based on a risk assessment) of two-hand control devices including their assessment, the prevention of defeat and the avoidance of faults. The standard also provides requirements and guidance for
28、two-hand control devices containing a programmable electronic system (see 7). This standard applies to all two-hand control devices, independent of the energy used, including: Two-hand control devices which are or are not integral parts of a machine; Two-hand control devices which consist of one or
29、more than one separate elements. BS EN 574:1996+A1:2008EN 574:1996+A1:2008 (E) 5 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publicatio
30、ns are listed in this clause. For dated references, subsequent amendments to or revisions of any of these publications only apply to this European Standard when incorporated. For undated references, the latest edition of the publication applies. EN 292-1:1991, Safety of machinery, basic concepts, ge
31、neral principles for design Part 1: Basic terminology, methodology. EN 292-2:1991/A1:1995, Safety of machinery, basic concepts, general principles for design Part 2: Technical principles and specifications. prEN 894-1:1992, Safety of machinery, ergonomics requirements for the design of displays and
32、control actuators Part 1: Human interactions with displays and control actuators. prEN 894-2:1992, Safety of machinery, ergonomics requirements for the design of displays and control actuators Part 2: Displays. prEN 894-3:1992, Safety of machinery, ergonomics requirements for the design of displays
33、and control actuators Part 3: Control actuators. EN 954-1:1996, Safety of machinery, safety related parts of control systems Part 1: General principles for design. prEN 999:1995, Safety of machinery, the positioning of protective equipment in respect of approach speeds of parts of the human body. EN
34、 1050:1996, Safety of machinery, principles for risk assessment EN 60204-1:1992, Safety of machinery, electrical equipment of machines Part 1: General requirements. 3 Definitions For the purposes of this standard, the following definitions apply: 3.1 two-hand control device a device which requires a
35、t least simultaneous actuation by the use of both hands in order to initiate and to maintain, whilst a hazardous condition exists, any operation of a machine thus affording a measure of protection only for the person who actuates it (see figure 1) BS EN 574:1996+A1:2008EN 574:1996+A1:2008 (E) 6 Key
36、1 input signal 2 two-hand control device 3 control actuating device 4 signal converter(s) 5 signal processor(s) 6 output signal 7 logic unit Figure 1 Schematic representation of a two-hand control device 3.2 input signal the externally actuated signal applied by hand to a control actuating device (s
37、ee fig. 1) 3.3 control actuating device a component of the two-hand control device which senses an input signal from one hand and transmits it to a signal converter (see fig. 1) 3.4 simultaneous actuation the continuing actuation of both control actuating devices during the same time period, whateve
38、r the time lag is between the start of one input signal and the start of the other (see fig. 2) NOTE In the English language the word “concurrent“ and the word “simultaneous“ are often used synonymously (e.g. see clause 9.2.7 of EN 60204-1:1992). 3.5 synchronous actuation a particular case of simult
39、aneous actuation where the time lag between the start of one input signal and the start of the other is less than or equal to 0,5 s (see fig. 3). BS EN 574:1996+A1:2008EN 574:1996+A1:2008 (E) 7 3.6 signal converter a component of the two-hand control device which receives an input signal from a cont
40、rol actuating device and which transmits and/or converts this signal into a form acceptable to the signal processor (see fig. 1). 3.7 signal processor a part of the two-hand control device which generates the output signal as a consequence of the two input signals (see fig. 1). 3.8 output signal the
41、 signal generated by the two-hand control device to be fed into the machinery to be controlled, and which is based on one pair of input signals (see fig. 1). 3.9 response time the time between the release of a control actuating device and the cessation of the output signal (see 9.8) 3.10 mobile two-
42、hand control device a device which can be moved and used in more than one definable position relative to the danger zone of the machine which it controls 4 Types of two-hand control devices and their selection Table 1 defines three types of two-hand control devices. It sets out the functional charac
43、teristics and the minimum measures for the safety of each type of two-hand control device in this standard. All two-hand control devices shall comply with EN 292 and the relevant parts of EN 60204-1. BS EN 574:1996+A1:2008EN 574:1996+A1:2008 (E) 8 Table 1 List of types of two-hand control devices an
44、d minimum safety requirements TYPES III REQUIREMENTS CLAUSE I II A B C Use of both hands (simultaneous actuation) 5.1 X X X X X Relationship between input signals and output signal 5.2 X X X X X Cessation of the output signal 5.3 X X X X X Prevention of accidental operation 5.4 X X X X X Prevention
45、of defeat 5.5 X X X X X Reinitiation of the output signal 5.6 *) X X X X Synchronous actuation 5.7 X X X Use of category 1 (EN 954-1:1996) 6.2 X X Use of category 3 (EN 954-1:1996) 6.3 X X Use of category 4 (EN 954-1:1996) 6.4 X *) NOTE for the selection of Type I see 8.6. The selection and the desi
46、gn of the type (see table 1) of two-hand control device will depend on: The hazard(s) present; The assessment of risk; Experience in use of technology; Other factors which shall be specified for each application (e.g. the prevention of accidental actuation and of defeat (see 8), other conditions (se
47、e 3 of EN 292-2:1991). NOTE Guidance on risk assessment may be found in EN 292-1 and detailed guidance is given in EN 1050 BS EN 574:1996+A1:2008EN 574:1996+A1:2008 (E) 9 5 Characteristics of safety functions The characteristics of safety functions described in 5.1 to 5.7 shall be included in two-ha
48、nd control devices in accordance with table 1. 5.1 Use of both hands (simultaneous actuation) The two-hand control device shall be designed so that the operator shall use both hands during the same time period, one hand on each control actuating device, to operate the two-hand control device. This i
49、s simultaneous actuation and is independent of any time lag between the initiation of each of the two input signals (see fig. 2). Figure 2 Input signals of simultaneous actuation 5.2 Relationship between input signals and output signal The input signal applied to each of the two control actuating devices shall together initiate and maintain the output signal from the two-hand control device only so long as both input signals are applied. The form of the output signal (e.g. in number of channels, by pulse, shape etc.) may vary accord
