EN 1870-12:2003
(Main)Safety of woodworking machines - Circular sawing machines - Part 12: Pendulum cross-cut sawing machines
Safety of woodworking machines - Circular sawing machines - Part 12: Pendulum cross-cut sawing machines
This European Standard specifies the requirements and/or measures to remove the hazards and limit the risk on pendulum cross-cut sawing machines, herein after referred to as 'machines', designed to cut solid wood, chipboard, fibreboard, plywood and also these materials when covered with plastic edging and/or plastic/light alloy laminates.
Any workpiece positioning equipment fitted to the machine is included in this European Standard.
This European Standard covers the hazards relevant to these machines as stated in clause 4.
This European Standard does not apply to :
a) machines for cross cutting logs;
b) machines where the saw unit can be rotated about a horizontal axis.
For Computer Numerically Controlled (CNC) machines this European Standard does not cover the hazards related to Electro-Magnetic Compatibility (EMC).
NOTE The requirements of this European Standard apply to all machines whatever their method of control e.g. electromechanical and/or electronic.
This European Standard is primarily directed at machines which are manufactured after the date of publication by CEN.
Sicherheit von Holzbearbeitungsmaschinen - Kreissägemaschinen - Teil 12: Pendelkreissägemaschinen
Diese Europäische Norm beschreibt die Anforderungen und/oder Maßnahmen für die Beseitigung von Gefährdungen und zur Begrenzung der Risiken an Pendelkreissägemaschinen - im Folgenden als "Maschinen" bezeichnet -, die konstruiert sind zum Schneiden von Massivholz, Spanplatten, Faserplatten oder Sperrholz, sowie diesen Werkstoffen, wenn sie mit Kunststoffkanten versehen sind und/oder Beschichtungen aus Kunststoff/Leichtmetall-Legierungen haben.
Jegliche Einrichtung zum Positionieren des Werkstückes, die an der Maschine angebaut ist, ist in dieser Europäischen Norm mit behandelt.
Diese Europäische Norm behandelt die für diese Maschinen zutreffenden Gefährdungen, wie sie in Abschnitt 4 beschrieben sind.
Diese Europäische Norm gilt nicht für:
a) Maschinen zum Querschneiden von Rundholz;
b) Maschinen, bei denen das Sägeaggregat um eine waagerechte Achse gedreht werden kann.
Diese Europäische Norm behandelt bei CNC-Maschinen nicht die Gefährdungen im Zusammenhang mit der elektromagnetischen Verträglichkeit (EMV).
ANMERKUNG Die Anforderungen dieser Europäischen Norm gelten für alle Maschinen unabhängig von der Art ihrer Steuerung, z. B. elektromechanisch und/oder elektronisch.
Diese Europäische Norm gilt in erster Linie für Maschinen, die hergestellt wurden, nachdem CEN diese Europäische Norm veröffentlichte.
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Sécurité des machines pour le travail du bois - Machines à scier circulaires - Partie 12: Tronçonneuses pendulaires
La présente Norme européenne spécifie les prescriptions et/ou les mesures pour éliminer les phénomènes dangereux et limiter les risques sur les tronçonneuses pendulaires (ci-après désignées "machines"), conçues pour la coupe de bois massif, de panneaux de particules et de fibres, de contre-plaqué, ainsi que ces matériaux lorsque leurs surfaces ou leurs chants sont recouverts de matière plastique stratifiée et/ou d'alliage léger.
L'équipement, fixé sur la machine, permettant le positionnement de la pièce à travailler est inclus dans la présente Norme européenne.
La présente Norme européenne couvre les phénomènes dangereux applicables à ces machines dont une liste est fournie à l'Article 4.
La présente norme ne s'applique pas aux :
a) machines conçues pour le tronçonnage de grumes ;
b) machines dont l'unité de sciage peut pivoter autour d'un axe horizontal.
Pour les machines à commande numérique (CN), la présente Norme européenne ne traite pas des phénomènes dangereux liés à la compatibilité électromagnétique (CEM).
NOTE Les exigences de la présente norme s'appliquent à toutes les machines quelle que soit leur méthode de commande, par exemple : électromécanique et/ou électronique.
La présente Norme européenne est applicable avant tout aux machines fabriquées après la date de publication de la présente Norme européenne.
Varnost lesnoobdelovalnih strojev - Krožne žage - 12. del: Nihalni čelilnik
General Information
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Sicherheit von Holzbearbeitungsmaschinen - Kreissägemaschinen - Teil 12: PendelkreissägemaschinenSécurité des machines pour le travail du bois - Machines a scier circulaires - Partie 12: Tronçonneuses pendulairesSafety of woodworking machines - Circular sawing machines - Part 12: Pendulum cross-cut sawing machines79.120.10Lesnoobdelovalni strojiWoodworking machines25.080.60Strojne žageSawing machinesICS:Ta slovenski standard je istoveten z:EN 1870-12:2003SIST EN 1870-12:2004en01-september-2004SIST EN 1870-12:2004SLOVENSKI
STANDARD
SIST EN 1870-12:2004
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 1870-12November 2003ICS 79.120.10English versionSafety of woodworking machines - Circular sawing machines -Part 12: Pendulum cross-cut sawing machinesSécurité des machines pour le travail du bois - Machines àscies circulaires - Partie 12: Tronçonneuses pendulairesSicherheit von Holzbearbeitungsmaschinen -Kreissägemaschinen - Teil 12: PendelkreissägemaschinenThis European Standard was approved by CEN on 1 September 2003.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and UnitedKingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2003 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 1870-12:2003 ESIST EN 1870-12:2004
EN 1870-12:2003 (E)2ContentsForeword.30Introduction.41Scope.42Normative references.43Terms and definitions.64List of hazards.85Safety requirements and/or measures.105.1Controls.105.1.1Safety and reliability of control systems.105.1.2Position of controls.115.1.3Starting.135.1.4Normal stopping.145.1.5Emergency stop.155.1.6Integrated feed.155.1.7Mode selection.165.1.8Failure of the power supply.165.1.9Failure of the control circuits.165.2Protection against mechanical hazards.165.2.1Stability.165.2.2Risk of break up during operation.175.2.3Tool holder and tool design.175.2.4Braking.185.2.5Devices to minimise the possibility or effect of ejection.195.2.6Workpiece supports and guides.205.2.7Prevention of access to moving parts.225.2.8Clamping devices.265.3Protection against non-mechanical hazards.265.3.1Fire265.3.2Noise.265.3.3Emission of chips and dust.275.3.4Electricity.275.3.5Ergonomics and handling.285.3.6Pneumatics.285.3.7Hydraulics.285.3.8Radiation.285.3.9Laser.285.3.10Static electricity.285.3.11Errors of Fitting.295.3.12Isolation.295.3.13Maintenance.296Information for use.296.1Warning devices.296.2Marking.306.3Instruction handbook.30Annex A (informative)
Examples of safety related control systems with electronic components.33Annex B (normative)
Dimensional tolerances of saw spindles.37Annex C (informative)
Safe working practice.38Annex ZA (informative)
Relationship of this document with EC Directives.39Bibliography.40SIST EN 1870-12:2004
EN 1870-12:2003 (E)3ForewordThis document EN 1870-12:2003 has been prepared by Technical Committee CEN/TC 142 “Woodworkingmachines - Safety”, the secretariat of which is held by BSI.This European Standard shall be given the status of a national standard, either by publication of an identical text orby endorsement, at the latest by May 2004, and conflicting national standards shall be withdrawn at the latest byMay 2004.This document has been prepared under a mandate given to CEN by the European Commission and the EuropeanFree Trade Association and supports essential requirements of EC Directive(s).For relationship with EC Directives see informative annex ZA which is an integral part of this document.Organisations contributing to the preparation of this European Standard include the European Committee ofWoodworking Machinery Manufacturer's Association “EUMABOIS”.The annex B is normative and annexes A and C are informative.This document includes a Bibliography.The European Standards produced by CEN/TC 142 are particular to woodworking machines and complement therelevant A and B Standards on the subject of general safety (see introduction of EN 292-1:1991 for a description ofA, B and C standards).According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal,Slovakia, Spain, Sweden, Switzerland and the United Kingdom.SIST EN 1870-12:2004
EN 1870-12:2003 (E)40IntroductionThis European Standard has been prepared to be a harmonised standard to provide one means of conforming tothe essential safety requirements of the Machinery Directive, and associated EFTA regulations.This European Standard is a type "C“ standard as defined in EN 1070:1998.The machinery concerned and the extent to which hazards, hazardous situations and events covered are indicatedin the scope of this document.When provisions of this type C standard are different from those which are stated in type A or B standards, theprovisions of this C type standard take precedence over the provisions of other standards, for machines that havebeen designed and built according to the provisions of this type C standard.The requirements of this European Standard are directed to manufacturers and their authorised representatives ofpendulum cross-cut sawing machines. It is also useful for designers.This European Standard also includes information which can be provided by the manufacturer to the user.Common requirements for tooling are given in EN 847-1:1997.1 ScopeThis European Standard specifies the requirements and/or measures to remove the hazards and limit the risk onpendulum cross-cut sawing machines, herein after referred to as 'machines', designed to cut solid wood, chipboard,fibreboard, plywood and also these materials when covered with plastic edging and/or plastic/light alloy laminates.Any workpiece positioning equipment fitted to the machine is included in this European Standard.This European Standard covers the hazards relevant to these machines as stated in clause 4.This European Standard does not apply to :a) machines for cross cutting logs;b) machines where the saw unit can be rotated about a horizontal axis.For Computer Numerically Controlled (CNC) machines this European Standard does not cover the hazards relatedto Electro-Magnetic Compatibility (EMC).NOTE The requirements of this European Standard apply to all machines whatever their method of control e.g.electromechanical and/or electronic.This European Standard is primarily directed at machines which are manufactured after the date of publication byCEN.2 Normative referencesThis European Standard incorporates by dated or undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text, and the publications are listed hereafter. Fordated references, subsequent amendments to or revisions of any of these publications apply to this EuropeanStandard only when incorporated in it by amendment or revision. For undated references the latest edition of thepublication referred to applies (including amendments).SIST EN 1870-12:2004
EN 1870-12:2003 (E)5EN 292-1:1991, Safety of machinery - Basic concepts, general principles for design - Part 1: Basic terminology,methodology.EN 292-2:1991, EN 292-2/A1:1995, Safety of machinery - Basic concepts, general principles for design - Part 2:Technical principles and specifications.EN 294:1992, Safety of machinery - Safety distance to prevent danger zones being reached by the upper limbs.EN 418:1992, Safety of machinery - Emergency stop equipment, functional aspects - Principles for design.EN 574:1996, Safety of machinery – Two-hand control devices - Functional aspects - Principles for design.EN 847-1:1997, Tools for woodworking - Safety requirements - Part 1: Milling tools and circular saw blades.EN 954-1:1996, Safety of machinery – Safety-related parts of controls systems - Part 1: General principles fordesign.EN 982:1996, Safety of machinery - Safety requirements for fluid power systems and their components –Hydraulics.EN 983:1996, Safety of machinery - Safety requirements for fluid power systems and their components –Pneumatics.EN 1037:1995, Safety of machinery - Prevention of unexpected start-up.EN 1070:1998, Safety of machinery – Terminology.EN 1088:1995, Safety of machinery - Interlocking devices associated with guards - Principles for design andselection.EN 1760-1:1997, Safety of machinery - Pressure sensitive protective devices - Part 1: General principles for thedesign and testing of pressure sensitive mats and pressure sensitive floors.EN 1760-2:2001, Safety of machinery - Pressure sensitive protection devices - Part 2: General principles for thedesign and testing of pressure sensitive edges and pressure sensitive bars.EN 60204-1:1992, Safety of machinery - Electrical equipment of machines - Part 1: General requirements (IEC60204-1:1992, modified).EN 60529:1991, Degrees of protection provided by enclosures (IP code) (IEC 60529:1989).EN 60825-1:1994+ A11:1996 + A2:2001, Safety of laser products – Part 1: Equipment classification, requirementsand user’s guide (IEC 60825-1:1993).EN 60947-4-1: 1992, Low-voltage switchgear and controlgear - Part 4-1: Contactors and motor starters;electromechanical contactors and motor starters (IEC 60947-4-1:1990).EN 60947-5-1:1997, Low voltage switchgear and control gear - Part 5-1: Control circuit devices and switchingelements; electromechanical control circuit devices (IEC 60947-5-1:1997).prEN 61496-2:1997, Safety of machinery - Electrosensitive protective equipment - Part 2: Particular requirementsfor equipment using active optoelectronic protective devices.EN ISO 3743-1:1995, Acoustics - Determination of sound power levels of noise sources - Engineering methods forsmall, moveable sources in reverberant fields - Part 1: Comparison method for hard walled test rooms (ISO 3743-1:1994).EN ISO 3743-2:1996, Acoustics - Determination of sound power levels of noise sources using sound pressure -Engineering methods for small, moveable sources in reverberant fields - Part 2: Methods for special reverberationtest rooms (ISO 3743-2:1994).SIST EN 1870-12:2004
EN 1870-12:2003 (E)6EN ISO 3744:1995, Acoustics - Determination of sound power levels of noise sources using sound pressure -Engineering method in an essentially free field over a reflecting plane (ISO 3744:1994).EN ISO 3746:1995, Acoustics - Determination of sound power levels of noise sources using sound pressure -Survey method using an enveloping measurement surface over a reflecting plane (ISO 3746:1995).EN ISO 4871:1996, Acoustics – Declaration and verification of noise emission values of machinery and equipment(ISO 4871:1996).EN ISO 9614-1:1995, Acoustics - Determination of sound power levels of noise sources using sound intensity -Part 1: Measurements at discrete points (ISO 9614-1:1993).EN ISO 11202:1995, Acoustics - Noise emitted by machinery and equipment - Measurement of emission soundpressure levels at the workstation and at other specified positions - Survey method in situ (ISO 11202:1995).EN ISO 11204:1995, Acoustics - Noise emitted by machinery and equipment - Measurement of emission soundpressure levels at the workstation and at other specified positions - Method requiring environmental corrections(ISO 11204:1995).EN ISO 11688-1:1998, Acoustics - Recommended practice for the design of low-noise machinery and equipment -Part 1: Planning (ISO/TR 11688-1:1995).ISO 3745:1977, Acoustics - Determination of sound power levels of noise sources - Precision methods foranechoic and semi-anechoic rooms.ISO 7960:1995, Airborne noise emitted by machine tools - Operating conditions for woodworking machines.HD 21.1 S3:1997, Polyvinyl chloride insulated cables of rated voltages up to and including 450/750V - Part 1:General requirements.HD 22.1 S3:1997, Rubber insulated cables of rated voltages up to and including 450/750V - Part 1: Generalrequirements.HD 22.4 S3:1995+ A1:1999, Rubber insulated cables of rated voltages up to and including 450/750 V
- Part 4:Cords and flexible cables (IEC 60245-4 : 1994, modified).3 Terms and definitionsFor the purposes of this European Standard the terms and definitions given in EN 1070:1998 and the followingapply.3.1cross-cuttingoperation of cutting across the grain of a wooden workpiece3.2pendulum cross-cut sawing machinemachine with a single saw blade positioned above the workpiece. The saw blade is moved manually or byintegrated feed through the workpiece during cutting and than back to its rest position. The stroke (see Figure 1) iseither in a straight line or an arc shaped line.SIST EN 1870-12:2004
EN 1870-12:2003 (E)7Key1StrokeFigure 1 — Example of a pendulum cross-cut sawing machine3.3manual pendulum cross-cut sawing machinemachine where the saw unit is fed by hand and the workpiece is manually positioned for cutting to length3.4semi-automatic pendulum cross-cut sawing machinemachine where the saw unit has integrated feed which is initiated manually and the workpiece is positionedmanually or by means of a positioning mechanism for cutting to length3.5automatic pendulum cross-cut sawing machinemachine where the saw unit has integrated feed, the workpiece is manually loaded and/or unloaded, automaticallypositioned for cutting to pre-selected lengths and where the integrated feed of the saw unit is initiated automatically3.6stationary machinemachine designed to be located on or fixed to the floor or other parts of the structure of the premises and to bestationary during use3.7transportable machinemachine which is located on the floor, stationary during use and equipped with a device, normally wheels, whichallow it to be moved between locations3.8machine actuatorpower mechanism used to effect motion of the machine3.9hand fed on pendulum cross-cut sawing machinesmanual holding and/or guiding of the workpiece or the manual guiding of the saw unit with the saw bladeSIST EN 1870-12:2004
EN 1870-12:2003 (E)83.10integrated feedfeed mechanism for the workpiece or tool which is integrated with the machine and where the workpiece ormachine element with incorporated tool are held and controlled mechanically during the machining operation3.11cutting area of the saw bladearea where the saw blade can be involved in the cutting process3.12non-cutting area of the saw bladearea of the saw blade where the saw blade is not involved in the cutting process3.13cutting area of a pendulum cross-cut sawing machinearea defined by all possible positions of the saw blade with the maximum diameter for which the machine isdesigned in front of the fence3.14run-up timetime elapsed from the actuation of the start control device until the spindle reaches the intended speed3.15unbraked run-down timetime elapsed from the actuation of the stop control, but not the braking device (if fitted) up to spindle standstill3.16braked run-down timetime elapsed from the actuation of the stop control and the brake device up to spindle standstill3.17manual loading of power fed machinesoperation where the workpiece is presented by the operator directly to the machine integrated feed, e.g. rotatingfeed rollers, travelling table or reciprocating carriage; i.e. for which there is no intermediate loading device toreceive and transfer the workpiece from the operator to the integrated feed3.18manual unloading of power fed machinesoperation where the workpiece is removed by the operator directly from the machine outfeed; i.e. for which there isno intermediate unloading device to receive and transfer the workpiece from the machine outfeed to the operator3.19confirmationstatements, sales literature, leaflets or other documents where a manufacturer (supplier) declares either thecharacteristics of e.g. a material or product or the compliance of the material or product to a relevant standard4 List of hazardsThis European Standard deals with hazards listed and relevant to the machines as defined in the scope :¾ for significant hazards by defining safety requirements and/or measures or by reference to relevant type Bstandards;¾ for hazards which are not significant e.g. general, minor or secondary hazards by reference to relevant typeA or B standards, especially EN 292-1:1991 and EN 292-2:1991/A1:1995.These hazards are listed in Table 1 in accordance with clause 4 of EN 292-1:1991.SIST EN 1870-12:2004
EN 1870-12:2003 (E)9Table 1 — List of hazardsNumberHazardRelevant sub-clauses of thisEuropean Standard1Mechanical hazards caused for example by :-shape;-relative location;-mass and stability (potential energy of elements);-mass and velocity (kinetic energy of elements);-inadequacy of the mechanical strength.Accumulation of potential energy by :-elastic elements (springs); or-liquids or gases under pressure; or-vacuum.of the machine parts or workpieces.1.1Crushing hazard5.2.7, 5.2.81.2Shearing hazard5.2.7, 5.2.81.3Cutting or severing hazard5.2.2, 5.2.3, 5.2.4, 5.2.71.4Entanglement hazard5.2.71.5Drawing-in or trapping hazard5.2.71.6Impact hazard5.2.7.41.8Friction or abrasion hazard5.2.41.9High pressure fluid ejection hazard5.2.4, 5.3.6, 5.3.71.10Ejection of parts (of machinery and processed materials/workpieces)5.1.6, 5.2.2, 5.2.3, 5.2.5, 5.2.6,5.2.81.11Loss of stability of machinery and machine parts5.2.12Electrical hazards caused for example by :2.1Electrical contact (direct or indirect)5.3.4, 5.3.12, 5.3.132.2Electrostatic phenomena5.3.102.4External influences on electrical equipment5.3.4, 5.3.84Hazards generated by noise resulting in :4.1Interference with speech communication, acoustic signals etc.5.3.24.2Hearing losses (deafness), or other physiological disorders (e.g. lossof balance, loss of awareness)5.3.26Hazards generated by radiation, especially by :6.2Lasers5.3.97Hazards generated by materials and substances processed, used orexhausted by machinery for example :7.1Hazards resulting from contact with or inhalation of harmful fluids,mists, fumes and dust5.3.3, 6.37.2Fire hazard5.3.1, 5.3.38Hazards generated by neglecting ergonomic principles in machinedesign (mismatch of machinery with human characteristics andabilities) caused for example by :8.1Unhealthy postures or excessive efforts5.1.2, 5.3.5, 6.38.2Inadequate consideration of human hand-arm or foot-leg anatomy5.1.2, 5.3.5, 6.38.3Neglect of use of personal protection equipment6.38.4Inadequate area lighting6.38.6Human error6.39Hazard combinations5.1.6, 5.1.7, 5.1.8, 5.2.7.4,5.3.3, 5.3.410Hazards caused by failure of energy supply breaking down ofmachinery parts and other functional disorders, for example :10.1Failure of energy supply (of energy and/or control circuits)5.1.8, 5.1.9, 5.2.4, 5.3.7, 5.3.810.2Unexpected ejection of machine parts or fluids5.3.7, 5.3.8, 5.3.1210.3Failure, malfunction of control systems (unexpected start up,unexpected overrun)5.1.8, 5.1.9, 5.2.3.1(continued)SIST EN 1870-12:2004
EN 1870-12:2003 (E)10Table 1 — List of hazards (concluded)NumberHazardRelevant sub-clauses of thisEuropean Standard10.4Errors of fitting5.2.3, 5.3.11, 6.1, 6.310.5Overturn, unexpected loss of machine stability5.2.111Hazards caused by (temporary) missing and/or incorrectly positionedsafety related measures/means for example :11.1All kinds of guard5.2.711.2All kinds of safety related (protection) devices5.1.1, 5.2.711.3Starting and stopping devices5.1.2, 5.1.3, 5.1.4, 5.1.511.4Safety signs and signals6.1, 6.211.5All kinds of information and warning devices6.2, 6.311.6Energy supply disconnection devices5.3.6, 5.3.7, 5.3.1211.7Emergency devices5.1.511.8Feeding/removal means of workpieces5.2.6, 5.2.7.411.9Essential equipment and accessories for safe adjusting and/ormaintaining5.3.1311.10Equipment evacuating gases etc5.3.3, 6.35 Safety requirements and/or measuresThe machine shall comply with the safety requirements and/or protective measures of this clause. In addition, themachine shall be designed according to the principles of clauses 5 and 6 of EN 292-1:1991 for hazards relevantbut not significant, which are not dealt with by this document (e.g. sharp edges).For guidance in connection with risk reduction by design, see clause 3 of EN 292-2:1991/A1:1995, and forsafeguarding measures, see clause 4 of EN 292-2:1991/A1:1995.5.1 Controls5.1.1 Safety and reliability of control systemsFor the purposes of this European Standard a safety related control system is one from and including the initialmanual control or position detector to the point of input to the final actuator or element e.g. motor. The safetyrelated control systems of this machine are those for :¾ starting (see 5.1.3);¾ normal stopping (see 5.1.4);¾ emergency stop (see 5.1.5);¾ moveable interlocked guards (see 5.1.3, 5.2.7);¾ moveable interlocked guards with guard locking (see 5.2.7);¾ on automatic and semi-automatic machines interlocking of the cutting stroke with saw blade rotation andworkpiece clamping (see 5.1.3);¾ on automatic machines interlocking of the powered workpiece positioning with the cutting stroke (see 5.1.6);¾ the mode selection (see 5.1.7);¾ the initiation of the braking system (see 5.1.4, 5.1.5, 5.2.4);¾ the two-hand control device (see 5.2.7);¾ on semi-automatic machines interlocking of self closing power operated guards with the position of the sawunit (see 5.2.7.2);¾ the active optoelectronic protective devices (light barriers) (see 5.2.7.4);¾ the pressure sensitive mats (see 5.2.7.4);¾ the mechanically actuated trip devices (trip bar) (see 5.2.7.4);¾ the workpiece clamping (see 5.2.8).Unless otherwise stated in this European Standard these control systems shall, as a minimum, be designed andconstructed in accordance with category 1 as defined in EN 954-1:1996.For the purposes of this European Standard "well tried components and principles" means :SIST EN 1870-12:2004
EN 1870-12:2003 (E)11a) electrical components if they comply with relevant standards including the following as :i) EN 60947-5-1:1997 (section 3) for control switches with positive opening operation used as mechanicalactuated position detectors for interlocking guards and for relays used in auxiliary circuits;ii) EN 60947-4-1:1992 for electromechanical contactors and motor-starters used in main circuits;iii) HD 22.1 S3:1997 for rubber-insulated cables;iv) HD 21.1 S3:1997 for polyvinyl chloride cable if this cable is additionally protected against mechanicaldamage by positioning (e.g. inside frames);b) electrical principles if they comply with the first four measures listed in 9.4.2.1 of EN 60204-1:1992. The circuitsshall be either “hardwired”, or if electronic components are used in safety related control systems “well tried” isfulfilled if they are in accordance with 9.4.2.2 (i.e. redundancy with cross-monitoring) or 9.4.2.3 (i.e. diversity) ofEN 60204-1:1992 (also see annex A);c) mechanical components if, for example they operate
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