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1、 Dansk standard Tillg DS/EN 1088/A1 1. udgave 2007-05-11 Maskinsikkerhed Tvangskoblings- anordninger i forbindelse med afskrmninger Konstruktions- principper og udvlgelse Safety of machinery Interlocking devices associated with guards Principles for design and selection Copyright Dansk Standard Prov
2、ided by IHS under license with DS-DANSKLicensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 05/04/2008 00:05:54 MDTNo reproduction or networking permitted without license from IHS -,-,- DS-publikationstyper Dansk Standard udgiver forskellige publikationstyper. Typen p denne publikation
3、 fremgr af forsiden. Der kan vre tale om: Dansk standard standard, der er udarbejdet p nationalt niveau, eller som er baseret p et andet lands nationale standard, eller standard, der er udarbejdet p internationalt og/eller europisk niveau, og som har fet status som dansk standard DS-information publ
4、ikation, der er udarbejdet p nationalt niveau, og som ikke har opnet status som standard, eller publikation, der er udarbejdet p internationalt og/eller europisk niveau, og som ikke har fet status som standard, fx en teknisk rapport, eller europisk prstandard DS-hndbog samling af standarder, eventue
5、lt suppleret med informativt materiale DS-hfte publikation med informativt materiale Til disse publikationstyper kan endvidere udgives tillg og rettelsesblade DS-publikationsform Publikationstyperne udgives i forskellig form som henholdsvis fuldtekstpublikation (publikationen er trykt i sin helhed)
6、godkendelsesblad (publikationen leveres i kopi med et trykt DS-omslag) elektronisk (publikationen leveres p et elektronisk medie) DS-betegnelse Alle DS-publikationers betegnelse begynder med DS efterfulgt af et eller flere prfikser og et nr., fx DS 383, DS/EN 5414 osv. Hvis der efter nr. er angivet
7、et A eller Cor, betyder det, enten at det er et tillg eller et rettelsesblad til hovedstandarden, eller at det er indfrt i hovedstandarden. DS-betegnelse angives p forsiden. Overensstemmelse med anden publikation: Overensstemmelse kan enten vre IDT, EQV, NEQ eller MOD IDT: Nr publikationen er identi
8、sk med en given publikation. EQV: Nr publikationen teknisk er i overensstemmelse med en given publikation, men prsentationen er ndret. NEQ: Nr publikationen teknisk eller prsentationsmssigt ikke er i overensstemmelse med en given standard, men udarbejdet p baggrund af denne. MOD: Nr publikationen er
9、 modificeret i forhold til en given publikation. DS/EN 1088/A1 Kbenhavn DS projekt: M203433 ICS: 13.110 Frste del af denne publikations betegnelse er: DS/EN, hvilket betyder, at det er en europisk standard, der har status som dansk standard. Denne publikations overensstemmelse er: IDT med: EN 1088:1
10、995/A1:2007. DS-publikationen er p engelsk. Copyright Dansk Standard Provided by IHS under license with DS-DANSKLicensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 05/04/2008 00:05:54 MDTNo reproduction or networking permitted without license from IHS -,-,- EUROPEAN STANDARD NORME EUR
11、OPENNE EUROPISCHE NORM EN 1088:1995/A1 April 2007 ICS 13.110 English Version Safety of machinery - Interlocking devices associated with guards - Principles for design and selection Scurit des machines - Dispositifs de verrouillage associs des protecteurs - Principes de conception et de choix Sicherh
12、eit von Maschinen - Verriegelungseinrichtungen in Verbindung mit trennenden Schutzeinrichtungen - Leitstze fr Gestaltung und Auswahl This amendment A1 modifies the European Standard EN 1088:1995; it was approved by CEN on 8 March 2007. CEN members are bound to comply with the CEN/CENELEC Internal Re
13、gulations which stipulate the conditions for inclusion of this amendment into the relevant 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. Th
14、is amendment exists in 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 nat
15、ional standards bodies 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
16、 United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2007 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1088:1
17、995/A1:2007: E Copyright Dansk Standard Provided by IHS under license with DS-DANSKLicensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 05/04/2008 00:05:54 MDTNo reproduction or networking permitted without license from IHS -,-,- EN 1088:1995/A1:2007 (E) 2 Foreword This document (EN 10
18、88:1995/A1:2007) has been prepared by Technical Committee CEN/TC 114 “Safety of machinery”, the secretariat of which is held by DIN. This Amendment to the European Standard EN 1088:1995 shall be given the status of a national standard, either by publication of an identical text or by endorsement, at
19、 the latest by October 2007, and conflicting national standards shall be withdrawn at the latest by April 2008. 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). Thi
20、s document corresponds to ISO 14119:1998/DAM1:2006 prepared by Technical Committee ISO/TC 199 “Safety of machinery“ (secretariat: DIN), which is currently submitted to FDIS vote. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bo
21、und to implement this European Standard: 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,
22、Switzerland and United Kingdom. Copyright Dansk Standard Provided by IHS under license with DS-DANSKLicensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 05/04/2008 00:05:54 MDTNo reproduction or networking permitted without license from IHS -,-,- EN 1088:1995/A1:2007 (E) 3 Introduction
23、 The aim of this document is the specification of more precise requirements in order to improve the provisions for minimizing the possibilities for defeat by machine operators. Research in some fields has shown that operators often try to defeat a guard interlocking safety function by attempting to
24、defeat the interlocking device, the possibility of defeat being primarily attributable to shortcomings in the design of the machine. 1 Modification to 5.7 Delete 5.7 “Design to minimize defeat possibilities“ and replace with the following: “5.7 Design to minimize defeat possibilities 5.7.1 General T
25、he requirements contained in this amendment for minimizing the possibilities for defeat of an interlocking device need not apply if the safety interlocking function has other effective measures to minimize the possibility of its defeat. These other measures include: specification of the safety inter
26、locking function is such that measures for minimizing the possibilities for defeat are implemented at the system level and therefore do not rely on the interlocking device itself (e.g. cyclical testing, status indication, time limitation), see NOTE 1; specification of the safety interlocking functio
27、n is such that measures for minimizing the possibilities for defeat is achieved by removing the foreseeable reason for attempting to defeat the interlocking device. This can include the provision of specific operating modes to facilitate the safe and efficient accomplishment of all foreseeable tasks
28、 during the full lifecycle of the machine, see NOTES 1 and 2. NOTE 1 The specification of safety functions and the design of safety related control systems that implement them are outside the scope of this European Standard. For information on this subject see EN ISO 12100, EN 62061, EN ISO 13849-1
29、and EN ISO 13849-2. NOTE 2 This approach can be effective at preventing any defeat of the safety function. If the specification of the safety interlocking function is such that it is possible to defeat the safety function solely by a reasonably foreseeable action at the interlocking device itself an
30、d if the device itself is to be relied on to prevent defeat, it should provide measures to minimize the possibility of defeat. The extent to which these measures are applied should depend on the likelihood of occurrence of attempts to defeat the device and also on the risk exposed by the defeat of t
31、he safety function. This information shall be produced by risk assessment (see EN 1050). Interlocking devices shall be designed and instructions for their installation and maintenance shall be given, to prevent the possibility of their defeat in a reasonably foreseeable manner. NOTE 3 The implementa
32、tion of alternative modes of operation can avoid the temptation and/or motivation of defeat. NOTE 4 “Defeat in a reasonably foreseeable manner” needs to take into account the characteristics of a specific application and therefore should be based on risk assessment. Typically “defeat in a reasonably
33、 foreseeable manner” can be an intentional attempt to defeat an interlocking device either manually or by using a readily available object.Readily available objects can be: screws, needles, sheet-metal pieces; Copyright Dansk Standard Provided by IHS under license with DS-DANSKLicensee=IHS Employees
34、/1111111001, User=Japan, IHS Not for Resale, 05/04/2008 00:05:54 MDTNo reproduction or networking permitted without license from IHS -,-,- EN 1088:1995/A1:2007 (E) 4 objects in daily use such as keys, coins, adhesive tape, string and wire; spare actuators or spare keys for the trapped-key interlocki
35、ng devices; tools required by the intended use of the machine or readily available tools (e.g. screwdrivers, wrenches, hexagonal keys and pliers). “Defeat in a reasonably foreseeable manner” includes the removal of switches or actuators with the help of the above- mentioned tools, with the intention
36、 to disable an interlocking device. The measures include, but are not limited to the provisions given below. Provisions by which defeat may be made more difficult shall include, in addition to a correct arrangement and fastening of detectors indicated in 5.2, one or more of the following measures, t
37、aking into account the characteristics of the device(s): a) use of interlocking devices or systems which are coded or individual coded, e.g. mechanically, electrically, magnetically, optically used singly or in combination; b) physical obstruction or shielding preventing access to the interlocking d
38、evice while the guard is open (e.g. hidden position) (see examples in Figures 5 and 6 and in Annex F, variant b); c) technical control measures carried out by the functional control system (e. g. cyclical testing); NOTE 5 When interlocking circuits are defeated the signals become static. Therefore m
39、onitoring of signal change by control means may be an effective measure. d) provision of additional position detectors in accordance with Figure 4 (see 5.4.1); e) other equally effective measures. Where interlocking systems rely on special actuators or keys (coded or not), advice shall be given in t
40、he instruction handbook concerning risks associated with the availability of spare actuators or keys and master keys. 5.7.2 Additional requirements for the design of mechanically actuated position detectors 5.7.2.1 Position detectors operated by cams When a single detector is used, it shall be actua
41、ted in the positive mode (see 5.1) since, among other characteristics, this mode of actuation prevents the detector from being defeated in a reasonably foreseeable manner (see Annex A). Furthermore, the device shall be secured by fastenings which cannot be easily released or loosened NOTE A higher l
42、evel of protection against defeat when a single detector is used can be achieved by enclosing the cam and detector in the same housing. 5.7.2.2 Tongueoperated switches The design of the switch, and in particular of the combination tongue/switching mechanism, shall prevent “defeating in a reasonably
43、foreseeable manner“ by minimizing the possibility of actuation by tools and objects other than the tongue. NOTE For “defeat in a reasonably foreseeable manner” see 5.7.1. In order to make defeat with the help of separate or dismantled actuators more difficult in addition to the requirements given in
44、 5.7.1 the actuator assembly shall be constructed so as to resist dismantling, e.g. by welding, riveting, “one-way” screws, glue, drilled screwhead. Copyright Dansk Standard Provided by IHS under license with DS-DANSKLicensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 05/04/2008 00:05
45、:54 MDTNo reproduction or networking permitted without license from IHS -,-,- EN 1088:1995/A1:2007 (E) 5 Key 1 sliding guard (open) 3 switch 2 cover (fixed part) 4 tongue Figure 5 Example of protection against defeating a tongueoperated switch 5.7.3 Additional requirements for the design of proximit
46、y switches and magnetic switches Proximity switches and magnetic switches shall be selected, installed and/or shielded such that they cannot be defeated in a reasonably foreseeable manner, e.g. by using a magnet or a piece of metal (see Figure 6). NOTE See EN 60947-5-3 for guidance on the selection
47、of a suitable switch. This standard defines four different types of proximity devices depending on the resistance to faults and on the behaviour in case of a fault. In order to make defeat with the help of separate or dismantled actuators more difficult in addition to the requirements given in 5.7.1
48、 the actuator assembly shall be constructed so as to resist dismantling, e.g. by welding, riveting, “one-way” screws, glue, drilled screwhead. Where there is a risk of a substitute actuator being used to defeat the system, an obstruction shall be incorporated into the mechanical arrangement to prevent the substitute actuator being used to actuate the switch (see Figure 6). Copyright Dansk Standard Provided by IHS under license with DS-DANSKLicensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 05/0