Eaton CROUSE-HINDS Serie Información Seguridad página 4

ATEX Safety Instructions for MTL7700 Range of Shunt Diode Safety Barriers
The following information is in accordance with the Essential Health and Safety Requirements (Annex II) of the EU
Directive 2014/34/EU [the ATEX Directive - safety of apparatus] and is provided for those locations where the ATEX
Directive is applicable .
General
a) This equipment must only be installed, operated and maintained by competent personnel . Such personnel shall
have undergone training, which included instruction on the various types of protection and installation practices, the
relevant rules and regulations, and on the general principles of area classification . Appropriate refresher training
shall be given on a regular basis . [See clause 4 .2 of EN 60079-17] .
b) This equipment has been designed to provide protection against all the relevant additional hazards referred to in
Annex II of the directive, such as those in clause 1 .2 .7 .
c) This equipment has been designed to meet the requirements of EN 60079-11 .
Installation
a) The installation must comply with the appropriate European, national and local regulations, which may include
reference to the IEC code of practice IEC 60079-14 . In addition, particular industries or end users may have specific
requirements relating to the safety of their installations and these requirements should also be met . For the majority
of installations the Directive 1999/92/EC [the ATEX Directive - safety of installations] is also applicable .
b) This apparatus is an associated electrical apparatus and is normally mounted in a non-hazardous [safe] area .
Specific apparatus described as Category 3 compliant may be installed in a Zone 2 location providing that the
relevant installation conditions are met . When mounted in a Zone 2 location the apparatus must be provided with an
enclosure, which offers an additional degree of protection appropriate to the area classification .
c) Unless already protected by design, this equipment must be protected by a suitable enclosure against:
i) mechanical and thermal stresses in excess of those noted in the certification documentation and the product
specification
ii) aggressive substances, excessive dust, moisture and other contaminants .
Read also the Special Conditions for Safe Use (below) for any additional or more specific information .
Special Conditions of Safe Use for Zone 2 applications
a) When used in Zone 2, the equipment must be installed in an enclosure or environment that
provides a degree of protection of at least IP 54 and meets the relevant material and environmental
requirements of EN 60079-0:2012 and EN 60079-15:2010 .
b) The equipment must not be inserted or removed unless either:
i) the area in which the equipment is installed is known to be non-hazardous or
ii) the circuit to which it is connected has been de-energised .
c) The 24V supply for this equipment must be derived from a regulated power supply complying with
the requirements of European Community Directives .
d) The relay contacts of MTL7741, MTL7742, MTL7743, MTL7744 and MTL7745 must switch no
more than 60Vac (75Vdc) when in a Zone 2 environment .
Inspection and maintenance
a) Inspection and maintenance should be carried out in accordance with European, national and local regulations
which may refer to the IEC standard IEC 60079-17 . In addition specific industries or end users may have specific
requirements which should also be met .
b) Access to the internal circuitry must not be made during operation .
Repair
a) This product cannot be repaired by the user and must be replaced with an equivalent certified product .
Marking
Each device is marked in compliance with the Directive and CE marked with the Notified Body Identification Number .
This information applies to MTL7700 products manufactured during or after the year 2011 .
2 INA7700 Rev 4