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CAT.DKI-50185- B -UK

SMC guide to ATEX compliant products

SMC - provide products c Outline of ATEX directiveSince 1st July 2003, equipment used in potentially explosive atmospheres within the EU is required to comply with the ATEX directive.Directive 94/9/EC Equipment and Protective Systems intended for use in potentially Explosive AtmospheresATEX,Directive 94/9/EC, known as ATEX directive, is one of the directives based on the New Approach towards technical harmonization and standardisation. The New Approach is a new regulatory technique and strategy laid down by the European Council Resolution of 1985, in order to allow free movement of goods within the EU market and to prevent barriers to trade. Products in compliance with all provisions of applicable directives (such as Directive 94/9/EC for ATEX) must bear the CE marking. This is an indication that the products comply with the requirements of applicable directives and have been subjected to the conformity assessment procedure provided for in these directives.

ATEX directive

New Approach directives and CE marking

ATEX

Potentially explosive atmospheres are atmospheres likely to become explosive due to local and operational conditions. The ATEX directive regards explosive atmospheres which are defined as mixtures with air, under atmospheric conditions, of flammable substances in the form of gases, vapours, mists or dusts in which, after ignition has occurred, combustion spreads to the entire unburned mixture. (Quotation from Directive 94/9/EC) The following applications are explicitly excluded by the ATEX directive and must comply with other specific standards: medical devices, equipment or safety devices to be used with explosive or chemically unstable substances, equipment for domestic and non-commercial environments with explosive atmosphere generated by leakage of fuel gas, personal protective equipment, offshore vessels, mobile units and means of transport. Certified equipment is designed to prevent the generation of ignition sources as defined by the standard EN1127-1: hot surfaces flames and hot gases Zone 2 Zone 1 mechanically generated sparks Category 3 Category 2 electrical sparks stray electric currents, cathodic corrosion protection static electricity Zone 0 lightning electromagnetic fields Category 1 electromagnetic radiations ionising radiations ultrasonics adiabatic compression shock waves, gas flows chemical reactions

definitions

Classification

Potentially explosive environments are classified into zones in accordance with Directive 1999/92/EC. These are: 0, 1, 2 for gas explosive atmospheres 20, 21, 22 for dust explosive atmospheres

The ATEX directive defines categories of equipment and protective systems, which can be used in the corresponding zones as per the following table. Zone Presence of the explosive Equipment atmosphere category Gas Dust Continuously or for long periods 1 0 20 >1000 hours/year Occasionally 2 1 21 10~1000 hours/year Rarely or for short periods 3 2 22 5m. Be sure to use the auto switch with the contact protection box in any case mentioned above.

40

ATEX Compliant Reed Switch/Tie-rod Mounting

D-A54/D-A67-588GrommetSpecifications D-A5 (With indicator light)Auto switch model number ATEX Category Application Load voltage Max. load current and range Contact protection circuit Internal voltage drop Indicator light

PLC: Programmable Logic Controllar

D-A54II 3GD EEx nA II T5 X -10CTa+60C IP67Relay/PLC 24V DC 5 to 50mA Built-in 2.4V ON: When red light emitting diode

D-A6 (Without indicator light)Auto switch model number

D-A67II 3GD EEx nA II T5 X -10CTa+60C IP67PLC/IC circuit MAX. 24V DC 30mA None 1 (Including 3m lead wire)

Note) All other specifications (dimensions, drawings, etc.) are the same as the non ATEX type.

ATEX Category Application Load voltage Max. load current Contact protection circuit Internal resistanceLead wire

Oilproof vinyl heavy insulation cable, 4, 0.3mm2, 2 cores (Brown, Blue), 0.5m or 4, 0.2mm2, 3 cores (Brown, Black, Blue), 0.5m

This category 3 type autoswitch can only be used in zones 2 and 22.

How to order

D-AInternal Circuit ( ): If not applicable for IEC StandardD-A54OUT() to Blue(Black)

-588Suffix for ATEX certified CAT.3

Zener diode Choke coil LED Reed switch ResistanceSurge absorberOUT(+) to Brown(Red)

Switch No.54 67 With indicator lamp Without indicator lamp

Lead wire lengthNo number L Z 0.5m 3m 5m

41

ATEX Compliant Reed Switch/Direct Mounting

D-A90/D-A93-588GrommetSpecifications D-A90 (Without indicator light)Auto swich modle number ATEX Category Application Load voltage Max. load current Contact protection circuit Internal resistance 24VAC DC

PLC: Programmable Logic Controller

D-A90II 3GD EEx nA II T5 X -10CTa+60C IP67IC circuit/Relay/PLC or less None 1 or less (Including 3m lead wire) 48VAC DC

or less

50mA

40mA

D-A93 (With indicator light)Auto switch model number ATEX Category Application Load voltage Max. load current and load current range Contact protection circuit Internal voltage drop Indicator lightLead wire D-A90/D-A93

D-A93II 3GD EEx nA II T5 X -10CTa+60C IP67Relay/PLC 24V DC 5 to 40mA None 2.4V (up to 20mA)/ 3V (up to 40mA) ON: When red light emitting diode

Oilproof vinyl heavy insulation cable, 2.7, 0.18mm2 X 2cores (Brown, Blue)

Note) All other specifications (dimensions, drawings, etc.) are the same as the non ATEX type.

This category 3 type autoswitch can only be used in zones 2 and 22.

Dimensions

D-AInternal Circuit ( ): If not applicable for IEC StandardReed switch

-588Suffix for ATEX certified CAT.3 Lead wire lengthNo number L Z 0.5m 3m 5m (Except D-A90 )

D-A90

Contact protective box CD-P11 CD-P12

OUT() Brown(Red) to OUT( ) Blue(Black)

Switch No.93 90 With indicator lamp Without indicator lamp

D-A93LED Reed switch Resistance Zener diode CD-P11 Blue(Black) CD-P12 Brown(Red) Contact protective box OUT(+) Brown(Red) to OUT() Blue(Black)

Electrical entryNo number V In line Perpendicular

Note) qIn the case operation load is an inductive load. wIn the case the wiring length to load is > 5m. Be sure to use the auto switch with the contact protection box in any case mentioned above.

42

ATEX Compliant Reed Switch/Direct Mounting

D-90A/D-93A-588Grommet Lead wire: Heavy insulation cableSpecifications D-90A (Without indicator light)Auto switch model number ATEX Category Application Load voltage Max. load current Internal resistance

PLC: Programmable Logic Controller

D-90AII 3GD EEx nA II T5 X -10CTa+60C IP67Relay/IC circuit/PLC 24V AC DC 50mA 1 or less (Including 3m lead wire)

D-93A (With indicator light)Auto switch model number ATEX Category Note) All other specifications (dimensions, drawings, etc.) are the same as the non ATEX type. Application Load voltage Load current range Internal voltage drop Indicator lightLead wire

D-93AII 3GD EEx nA II T5 X -10CTa+60C IP67Relay/PLC 24V DC 5 to 40mA 2.4V ON: When red light emitting diode

Oilproof vinyl heavy insulation cable, 0.2mm2, 2 cores (Brown, Blue), 0.5m

This category 3 type autoswitch can only be used in zones 2 and 22.

Internal Circuit ( ): If not applicable for IEC StandardD-90A

How to orderReed switch Contact protection box CD-P11 CD-P12OUT() Brown(Red) to OUT( ) Blue(Black)

D-

A

-588Suffix for ATEX certified CAT.3

D-93ABrown (Red) Reed switch Zener diode Resistance LED Blue (Black) Contact protection box CD-P11 CD-P12 OUT(+) Brown(Red) to OUT() Blue(Black)

Switch No.93 90 With indicator lamp Without indicator lamp

Lead wire lengthNo number L Z 0.5m 3m 5m

Note) qIn the case operation load is an inductive load. wIn the case the wiring length to load is > 5m. Be sure to use the auto switch with the contact protection box in any case mentioned above.

43

ATEX Compliant Reed Switch/Direct Mounting

D-Z73/D-Z80-588GrommetSpecifications D-Z7 (With indicator light)Auto swich model number ATEX Category Application Load voltage Max. load current and load current range Contact protection circuit Internal voltage drop Indicator light

PLC: Programmable Logic Controller

D-Z73II 3GD EEx nA II T5 X -10CTa+60C IP67Relay/PLC 24V DC 5 to 40mA None 2.4V (up to 20mA)/ 3V (up to 30mA) ON: When red light emitting diode

D-Z8 (Without indicator light)Auto switch model number ATEX Category

D-Z80II 3GD EEx nA II T5 X -10CTa+60C IP67Relay/PLC/IC circuit

Note) All other specifications (dimensions, drawings, etc.) are the same as the non ATEX type.

Application Load voltage Max. load current Contact protection circuit Internal resistanceLead wire

24V AC or less DC50mA None

48V AC or less DC40mA

1 or less (Including 3m lead wire)

Oilproof vinyl heavy insulation cable, 3.4, 0.2mm2, 3 cores (Brown, Black, Blue), 2 cores (Brown, Blue), 0.5m

This category 3 type autoswitch can only be used in zones 2 and 22.

How to order

Internal Circuit ( ): If not applicable for IEC StandardD-Z73LED Brown(Red) Reed switch Resistance Zener diode CD-P11Blue(Black)

D-Z

-588Suffix for ATEX certified CAT.3

Contact protection box

OUT(+) Brown(Red) to OUT() Blue(Black)

CD-P12

Switch No.73 80 With indicator lamp Without indicator lamp

Lead wire lengthNo number L Z 0.5m 3m 5m

D-Z80Reed switch Contact protection box CD-P11 CD-P12OUT() Brown(Red) to OUT( ) Blue(Black)

Note) qIn the case operation load is an inductive load. wIn the

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