5Manual maxGUARD2526740000/02/03.2018
2 Safety | Use in explosive risk zones
2.3 Use in explosive risk zones
A list of all maxGUARD products that may be used in explo-
sive atmospheres, zone 2, can be found in section 3.9. If
maxGUARD products are used in explosive risk zones, the fol-
lowing additional notes apply:
– Staff involved in assembly, installation and operation must
be qualified to perform safe work on electrical systems
protected against potentially expolsive atmospheres.
– The provisions of IEC60079-14 must be observed.
– The products must be installed in a tool-secured enclo-
sure with a degree of protection of at least IP54 accord-
ing to IEC 60079-7.
– The housing enclosing the products must meet the
requirements of explosion protection type Ex na, Ex eb or
Ex ec.
– Prior to starting installation, ensure that no potentially
explosive atmosphere exists.
– If cut cross-connectors are used, AMG PP separation
plates must be inserted wherever there are bare cut
edges next to one another.
– If the temperature of a conductor or conductor entry
exceeds 70°C during rated operation, or 80°C at the
contact point, a conductor must be used that complies
with the temperature specifications as per the actually
measured temperature values.
– The products may only be operated in an environment
with pollution severity level 2 or lower in accordance with
IEC60664-1.
– A stabilised power supply (24VDC) with double or rein-
forced isolation must be used (SELV/PELV).
– A visual inspection of the maxGUARD station is to be per-
formed once per year.
– If a potentially explosive atmosphere exists, the following
applies:
– Live electrical connections may not be disconnected.
– DIP switches, binary switches and potentiometers may
not be operated.
2.4 Legal notice
The products belonging to the maxGUARD family are CE-
compliant according to EU Directive 2014/30/EU (EMC
Directive).
Selected products belonging to the maxGUARD family meet
the requirements of the ATEX Directive 2014/34/EU.
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