オイヒナー　爆発性雰囲気用安全スイッチ

ATEX Safety switches for potentially explosive atmospheres 1

ATEX products from EUCHNER General information The ATEX directive Prevention of explosions Since 1 July 2003, all equipment in the EU that is used in a The most effective way of preventing an explosion is to prevent potentially explosive atmosphere must comply with directive the formation of a potentially explosive atmosphere. This type 94/9/EC. of explosion protection is called primary explosion protec- This directive is entitled “Equipment for potentially explosive tion. Primary explosion protection is not always possible. For atmospheres (ATEX)” – ATEX for short. The ATEX directive this reason, ignition of the potentially explosive atmosphere is intended for manufacturers and users of equipment and must be prevented. This measure protective systems used in potentially explosive atmospheres. is termed secondary explosion protection. In practice, this This directive was superseded by directive 2014/34/EU in form of protection is achieved by using explosion protected April 2016. equipment. This equipment ensures that no ignition source can be produced due to its operation in a potentially explosive All previously valid national regulations were standardized in atmosphere. the course of harmonizing the ATEX directive within the EU member states. Accordingly, the same, consistent rules for Marking of equipment explosion protection are applicable here. Equipment intended for potentially explosive atmospheres must Explosion protection is part of safety engineering and serves to be marked with the symbol. avoid harm to persons and property damage. The equipment must be marked accordingly on the type label. Explosion-protection equipment is marked Prerequisites for an explosion according to: The following prerequisites must be met for an explosion A pplication to occur: Equipment properties A potentially explosive mixture of – combustible material (gas, vapor, mist or dust) – oxidizing agents (oxygen) An ignition source (sparks, hot surfaces, etc.) Combustible Air (oxygen) material Ignition source 2 v

Marking according to application n Marking according to ATEX II 3 G Directive Equipment Categories Material groups Corresponds to groups 2014/34/EU I: Mining II: A ll areas except Equipment categories mining (includes category and material group) Category 1 Category 2 Category 3 Very high safety level High safety level Normal safety level Material groups G: gases, D: dusts G D G D G D Equipment categories 1G 1D 2G 2D 3G 3D Hazardous zones Zone 0 Zone 20 Zone 1 Zone 21 Zone 2 Zone 22 Equipment groups Depending on the place of use, equipment is classified into the zones. The hazardous zone defines the probability of occur- following groups according to the ATEX directive: rence of a potentially explosive atmosphere. A distinction is Group I: Equipment for use in underground mining made between zones for combustible gases (zones 0, 1 and 2) Group II: Equipment for all other potentially explosive and combustible dusts (zones 20, 21 and 22). The related atmospheres. zone must be defined by the machine or plant manufacturer. The EN 60079-14 standard must be taken into account Equipment categories for selecting the equipment and for its subsequent assembly The category describes the permissible application and the and setup. achieved safety level of equipment according to the ATEX directive. Equipment with equipment-related ignition sources must undergo an ignition hazard assessment to avoid potential ZONE 1 ignition sources. This must form the basis for taking measures ZONE 0 in accordance with the basic safety requirements to rule out the risk of ignition from this equipment. The equipment category defines the hazardous zone in which a device (equipment) can be used. ZONE 2 Table 1 shows the classification and assignment of equipment Example zone classification for a tank system. categories and individual hazardous zones. Information on zone 2/22 Material groups ATEX equipment manufactured by EUCHNER is suitable for The ATEX directive divides combustible materials into so-called use in zone 2 and zone 22. material groups. A distinction is made between the following I f cable glands are used on equipment for zone 2/22, they material groups: must possess special ATEX suitability. An appropriate cable G (gases, vapors and mists) gland is included with EUCHNER ATEX products. D (dusts) Equipment for zone 2/22 does not require a test certificate from a notified body. ATEX equipment is tested by the man- Hazardous zones ufacturer under the manufacturer’s responsibility. In accordance with EN 60079-10-1/2, the potentially explosive applications of electrical equipment are classified into hazardous 3 v

Classification and assignment of the equipment categories Com- Temporary behavior of combustible materials in the Hazardous Equipment marking Equipment bustible explosion area. zones protection level materi- Explosive medium: Equip- Equipment (EPL) als ment category group present continuously, for long periods or frequently Zone 0 II present occasionally Zone 1 II 1G Ga 2G Gb probably not present. If present, only rarely or briefly Zone 2 II 3G Gc present continuously, for long periods or frequently Zone 20 II present occasionally Zone 21 II 1D Da 2D Db probably not present due to disturbed dust. If present, only Zone 22 II 3D Dc rarely/briefly Table 1 Hazardous zones Equipment categories Zone 0 C ategory 1G/1D Area in which a potentially explosive atmosphere comprising Equipment in this category is intended for use in areas in which a mixture of air and combustible gases, vapors or a potentially explosive atmosphere comprising gases (G) or dusts mists is present continuously, for long periods or (D) is present continuously, for long periods or frequently. frequently. Requirements for the equipment Zone 20 Very high level of safety. The equipment remains protected Area in which a potentially explosive atmosphere comprising a against providing a source of ignition even in case of malfunc- cloud of combustible dust in the air is present continuously, tions to be expected only rarely. The equipment also remains for long periods or frequently. safe if two independent failures occur. Safety is achieved using two independent means of protection against providing a source of ignition. Zone 1 C ategory 2G/2D Area in which a potentially explosive atmosphere comprising Equipment in this category is intended for use in areas in which it a mixture of air and combustible gases, vapors or mists can is to be expected that a potentially explosive atmosphere occasionally form during normal operation. comprising gases (G) or dusts (D) may occur occasionally. Zone 21 R equirements for the equipment Area in which a potentially explosive atmosphere comprising High level of safety. The equipment remains protected against a cloud of combustible dust in the air can occasionally form providing a source of ignition even in the case of malfunctions or during normal operation. fault conditions to be expected frequently. Safety is achieved using one means of protection against providing a source of ignition. Zone 2 C ategory 3G/3D Area in which a potentially explosive atmosphere comprising Equipment in this category is intended for use in areas in which it a mixture of air and combustible gases, vapors or mists is not to be expected that a potentially explosive atmosphere may usually does not form or forms only briefly during occur due to gases (G) or dusts (D). If a potentially explosive normal operation. atmosphere nevertheless occurs, then in all probability it will Zone 22 occur only rarely and for a short period. Area in which a potentially explosive atmosphere comprising Requirements for the equipment a cloud of combustible dust in the air usually does not form Equipment offers a normal level of safety. The equipments or forms only briefly during normal operation. remains protected against providing a source of ignition in normal operation. ATEX equipment manufactured by EUCHNER is category 3 equipment. 4 v Dusts Gases/ vapors /mists

Marking according to equipment characteristics n Marking according to standard Gases Marking for use in atmospheres with combustible gases (zones 0, 1, 2) according to EN 60079-0 Ex nA IIB T5 Gc X Explosion- Types of protection: Explosion Temperature class: Equipment X: protected i: Intrinsic safety groups: T1 to T6 protection Special equipment m: Encapsulation IIA/IIB/IIC Permissible surface level: conditions o: Oil immersion temperature Ga/Gb/Gc must be met e: I ncreased safety (e.g. properly ec: f or equipment tightened cover protection level Gc screws) q: Powder filling p: Pressurization d: Flameproof enclosure n: Type of protection nA: Non-sparking equipment nR: Restricted breathing enclosure Dusts Marking for use in atmospheres with combustible dusts (zones 20, 21, 22) according to EN 60079-0 Ex tc IIIC T90°C Dc X Explosion- Types of protection: Explosion Maximum surface temperature: Equipment X: protected i: Intrinsic safety groups: T=Ta+Ti protection Special equipment m: Encapsulation IIIA/IIIB/IIIC T: Maximum surface temperature level: conditions t: Protection by Ta: Max. ambient temperature Da/Db/Dc must be met enclosure Ti: Intrinsic heating of the equipment (e.g. properly tc: f or equipment tightened cover protection level Gc screws) p: Pressurization 5 v

Types of protection The general requirements for electrical equipment are listed in type and function, and it is included in the ATEX marking on the EN 60079-0 standard. Classification occurs into various the type label of the respective device. types of protection: The type of protection the manufacturer EUCHNER uses the following types of protection (Table 2): uses for a device (equipment) essentially depends on the device Basic Marking Type of protection Standard corresponding standard to the type of protection Type of protection “nR” Restricted breathing enclosure Ex nR (zone 2) EN 60079-15 Enclosure designed to restrict the penetration of gas, vapors and mists Gases Type of protection “nA”Ex nA (zone 2) EN 60079-15 EN 60079-0 Non-sparking equipment Type of protection “i” Ex ic (zone 2) EN 60079-11 Intrinsic safety Type of protection “ec” Ex ec (zone 2) EN 60079-7 due to increased safety Type of protection “t” Ex tc (zone 22) EN 60079-31 Dusts Protection by enclosure EN 60079-0 Type of protection “i” Ex ic (zone 22) EN60079-11 Intrinsic safety Table 2 Explosion groups Explosion groups and temperature classes determine the Explosion group IIC includes explosion groups IIB and IIA. media for which equipment may be used within the hazardous ATEX equipment manufactured by EUCHNER belongs to zones. explosion group IIB. Equipment for areas with combustible gases E quipment for areas with combustible dusts The ignitability of an explosive atmosphere depends on the Material group D is classified into explosion groups IIIA, IIIB material. and IIIC depending on the size and conductivity of the dust Gases and vapors are classified into explosion groups IIA, IIB particles (see Table 3). and IIC depending on the energy required for ignition (see The danger posed by dusts (ignitability) increases from Table 4 in the chapter on temperature classes). explosion group IIIA to IIIC. ATEX equipment manufactured by EUCHNER belongs to explosion group IIIC. The danger posed by the gases (ignitability) increases from ex- plosion group IIA to IIC. The requirements on the equipment increase correspondingly. Electrical equipment approved for IIB, for example, may also be used for explosion group IIA. Explosion group Dust types IIIA Combustible fibers and lint (example: textiles) IIIB IIIC Non-conductive dust (example: sawdust, flour) Conductive dust (example: metal dust, dust containing carbon) Table 3 6 v

Temperature classes Electrical equipment is classified into temperature classes T1 A safety clearance (maximum surface temperature to ignition/ to T6. The temperature class relates directly to the smoldering temperature) might also have to be taken into ignition temperature of gases and dusts (temperature above account. which an explosive atmosphere ignites) and On equipment intended for use in zones 0, 1, 2 (gases), s moldering temperature of dusts (temperature above which the related temperature class must be given in the equipment a deposited dust layer begins to smolder) marking. and thereby specifies the maximum permissible surface tem- On equipment intended for use in zones 20, 21, 22 (dusts), perature of the equipment. the maximum surface temperature must be given in the equip- The maximum surface temperature must always be less than ment marking. the ignition/smoldering temperature of the explosive atmo- sphere in which the equipment is used. Classification of explosive gases according to explosion groups and temperature classes Ammonia Gasoline Ethyl alcoholMethane Diesel IIA Cyclohexane AcetaldehydeEthane Fuel oil n-butanePropane n-hexane IIB Ethylene glycolTown gas Ethylene IIC H ydrogen Ethyl etherAcrylonitrile Ethylene oxide sulfide C arbon Hydrogen Acetylene Trichlorosilane disulfide T1 < 450 °C T2 < 300 °C T3 < 200 °C T4 < 135 °C T5 < 100 °C T6 < 85 °C Note: The list contains only some of the explosive materials. Table 4 Equipment protection level Devices (equipment) for potentially explosive atmospheres The first letter indicates the type of explosive atmosphere: G for are classified into protection levels (EPL: Equipment Protection gas and D for dust. The second letter indicates the correspond- Level). The marking consists of two letters. ing protection level (see Table 1). 7 v Temperature class Explosion group

Overview of Electromechanical safety switches ATEX safety engineering Safety switch Safety switch Safety switch Safety switch NZ1-RS…EX NZ.VZ…EX SGA1…EX STA.A…EX NZ1-HS…EX Marking according to - Application (gases/dusts) II 3 G D II 3 G D II 3 G D II 3 G D - Equipment characteristics (gases) Ex nR IIB T5 Gc Ex nR IIB T5 Gc Ex nR IIB T5 Gc Ex nR IIB T4 Gc - Equipment characteristics (dusts) Ex tc IIIC T90° Dc (NZHS)Ex tc IIIC T100° Dc (NZRS) Ex tc IIIC T90° Dc Ex tc IIIC T90° Dc X Ex tc IIIC T110° Dc X Approvals - Basic housing accord- - Basic housing accord- - I dentical mounting - Metal actuating head ing to EN 50041 ing to EN 50041 dimensions to safety - High locking force Features/specific advantages - W ith impact resistant - With impact resistant switch STA - W ith impact resistant cover cover - With impact resistant cover cover Slow-action switching contacts Positively driven contacts 1 2 2 3 4 1 2 2 3 4 1 2 2 3 4 1 1 2 2 2 4 NO contacts 1 – 2 1 – 1 – 2 1 – 1 – 2 1 – 1 – – 2 1 – NC contacts – – – – – – – – – – – – – – – – 1 – – 1 – Conventional thermal current 4 A 4 A 4 A 1 mA Switching current, min. (at 24 V) 1 mA 1 mA 1 mA 1 mA Mechanical life, min. 30 x 106 2 x 106 2 x 106 1 x 106 Housing material Anodized die-cast alloy Anodized die-cast alloy Die-cast alloy Die-cast alloy Housing dimensions, min. (HxWxD) 128 x 44 x 43.5 mm 142 x 44 x 43.5 mm 123 x 45 x 52 mm 191 x 43 x 46 mm Ambient temperature -20 to +75 °C -20 to +75 °C -10 to +75 °C -20 to +75 °C Degree of protection, max., acc. to IEC 60529 IP67 IP67 IP67 IP67 LED indicators – – – – Depending on actuator Approach/actuating directions Approach speed, max. 20 m/min. 20 m/min. 20 m/min. 20 m/min. Solenoid operating voltage – – – 24 V Power consumption – – – 8 W Locking force, max. – – – 3000 N Cable entry (ATEX cable gland included) M 20 x 1.5 M 20 x 1.5 3 x M 20 x 1.5 3 x M 20 x 1.5 Straight actuator/bent /– / / Hinged actuator    Door radius, min. 165 mm 200 mm 200 mm Bolts for safety guards – – –  optionally available p available on request – not applicable The specified data refer to the respective minimum and/or maximum values for the entire series. 8 Accessories Connection Guard locking Environment Inputs/outputs ATEX

Overview of Transponder-coded safety switches ATEX safety Without guard locking With guard locking engineering Safety switch Safety switch Safety switch CES-A-C5…EX CES-C04 CTP…EX Marking according to - Application (gases/dusts) II 3 G D II 3 G D II 3 G D - Equipment characteristics (gases) Ex ic nA IIB T5 Gc X Ex nA IIB T6 Gc X Ex nA IIB T4 Gc X --Equipment characteristics (dusts) Ex ic tc IIIC T90° Dc X Ex tc IIIC T80° Dc X Ex tc IIIC T110° Dc X Safety category PL acc. to EN ISO 13849-1 Cat. 4 / PL e Cat. 4 / PL e Cat. 4 / PL e Approvals - No own pulsing of the - CES-C04 AP/AR switches - Metal actuating head safety outputs may be used in potentially - A ttachment compatible with - External pulsing (possible explosive atmospheres only safety switch STA with safe PLC, for example) when equipped with housing - With impact resistant cover Features/specific advantages guard AM-C-C04-Ex-137528 - s eparate pulsing on safety - separate pulsing on safety outputs to detect short outputs to detect short circuits circuits Semiconductor safety outputs 2 2 2 Monitoring outputs (semiconductor) 1 1 2 Switching current per safety output (semiconductor) 100 mA 150 mA 150 mA Mechanical life, min. – – 1x106 Integrated evaluation unit/ Integrated evaluation unit/ Integrated evaluation unit/ Switch read head read head read head Dimensions, min. (HxWxD) 118 x 40 x 40 mm 75 x 30 x 20 mm 245 x 45 x 43 mm Ambient temperature -20 to +50 °C 0 to +65 °C -20 to +55 °C Degree of protection, max., according to IEC 60529 IP67 IP67/IP69/IP69K IP65/IP67 LED indicators 2 2 3 Approach directions Solenoid operating voltage – – 24 DC Power consumption, max. – – 6 W Locking force, max. – – 2600 N Plug connector Plug connector M 12 Plug connector M 8 / connection cable Plug connector M 12 Rectangular actuator (transponder) Typical switch-on distance: Typical switch-on distance: 22 mm 14 mm Straight actuator Bolts for safety guards – – –  optionally available p available on request – not applicable The specified data refer to the respective minimum and/or maximum values for the entire series. 9 Accessories Connection Guard locking Environment Inputs/outputs ATEX

Ordering table pe 1 ) s/ g t y f itio n e s f 1 ) n n o s o n zo us ts cl a e e i o o. c k ing p o ing sit i fo r =d ur ac e o d /D at rf atu r r n d l tor oi tor po bl e i i es e r n s u r m de ar n le n or ta as p x . i g m a p e Ite Or Gu Mo o m so M do Su G= T e m te Electromechanical safety switches NZ1RS-3131-M-EX 094169 - - - - - - 2 pos. dr. + 2 NO 2 / 22 T5/100 °C NZ1HS-3131-M-EX 094167 - - - - - - 2 pos. dr. + 2 NO 2 / 22 T5/90 °C NZ1VZ-2131E-M-EX 093660 - - - - - - 3 pos. dr. + 1 NO 2 / 22 T5/90 °C SGA1A-2131A-M-EX 123460 - - - - - - 3 pos. dr. + 1 NO 2 / 22 T5/90 °C Closed- 2 pos. dr. STA3A-2131A024MF-EX 115584 circuit current 1 NC 2 / 22 T4/110 °C principle + 1 NO Open- 2 pos. dr. STA4A-2131A024MF-EX 115585 circuit current 1 NC 2 / 22 T4/110 °C principle + 1 NO Closed- STA3A-4121A024MF-EX 115586 circuit current 2 pos. dr. 1 NC + 1 NO 2 / 22 T4/110 °C principle Open- STA4A-4121A024MF-EX 123076 circuit current 2 pos. dr. 1 NC + 1 NO 2 / 22 T4/110 °C principle Transponder-coded safety switches Safety switches without guard locking CES-A-C5H-01-EX 097945 - - - - - - 2 safety outputs 2 / 22 T5/90 °C (Unicode) (semiconductor) Actuator: CES-A-BBA-EX 098158 2 / 22 T6/85 °C CES-A-BPA-EX 102125 2 / 22 T6/85 °C CES-C04 any 2 safety outputs 2 / 22 T6/80 °C (version AP/AR) (semiconductor) Equipment protection: AM-C-C04-EX 137528 2 / 22 T6/85 °C Actuator: CES-A-BBN-C04-EX 137527 2 / 22 T6/85 °C Safety switches with guard locking CTP-L1-AP-U-HA-AZ-SA-EX 136675 Closed- 2 safety outputs 1 monitoring output OD 2 / 22 T4/110 °C (Unicode) circuit current (semiconductor) (semiconductor) principle + monitoring output OL CTP-L1-AP-U-HA-AZ-SA-EX 129512 Closed- 2 safety outputs 1 monitoring output OD 2 / 22 T4/110 °C (Unicode) circuit current (semiconductor) (semiconductor) principle + diagnostics output OI Actuator (straight): A-C-H-G-LS-EX 136826 2 / 22 T4/110 °C 1) pos. dr.: positively driven normally closed contact; NC: normally closed contact, NO: normally open contact 10 v

ss/ Further informationa e c l ce e Details about the various ATEX safety switches and accessories can be found on our homepage at www.euchner.com atu r r r fa tur pe . s u erax p Te m m a te m 11 v

EN EUCHNER GmbH + Co. KG Kohlhammerstraße 16 70771 Leinfelden-Echterdingen Germany Tel. +49 711 7597-0 Fax +49 711 753316 info@euchner.de www.euchner.com 136805-03-04/17 Subject to technical modifications; no responsibility is accepted for the accuracy of this information. © EUCHNER GmbH + Co. KG · TA