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ATEX Safety Instructions for MTL4850 range HART Multiplexer solutions
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 60079-15 .
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) 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 area of not more than pollution
degree 2 in accordance with IEC60664-1, and in an enclosure provides a minimum degree of
protection of IP 54 and complies with the relevant requirements of EN 60079-0 and EN 60079-15 .
b) All connections to the equipment and internal connections between modules forming the
equipment must not be inserted or removed unless either the area in which the equipment is
installed is known to be non-hazardous, or the circuits connected have been de-energised .
c) The certified equipment to which the HCU16-xxx is connected must be fitted with transient
protection devices meet the requirements of clause 13 of IEC60079-15: 2010 .
d) However this equipment must be derived from a regulated power supply complying with the
requirements of the European Community Directives .
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 MTL4850 products manufactured during or after the year 2008 .
2 INA4850 Rev 5