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Mounting
4.1 Safety notices for installation
The device may only be operated in an environment with pollution degree 1 or 2 (see
IEC 60664-1).
When used in hazardous environments corresponding to Class I, Division 2 or Class I,
Zone 2, the device must be installed in a cabinet or a suitable enclosure.
General notes on use according to ATEX and IECEx
Requirements for the cabinet/enclosure
To comply with EC Directive 2014/34 EU (ATEX 114) or the conditions of IECEx, this
enclosure or cabinet must meet the requirements of at least IP54 (in compliance with
EN 60529) according to EN 60079-7.
Safety notices when using according to FM
If you use the device under FM conditions you must also keep to the following safety notices
in addition to the general safety notices for protection against explosion:
EXPLOSION HAZARD
The equipment is intended to be installed within an enclosure/control cabinet. The inner
service temperature of the enclosure/control cabinet corresponds to the ambient
temperature of the module. Use installation wiring connections with admitted maximum
operating temperature of at least 10 °C higher than maximum ambient temperature.
Wall mounting is only permitted if the requirements for the housing, the installation
regulations, the clearance and separating regulations for the control cabinets or housings
are adhered to. The control cabinet cover or housing must be secured so that it can only be
opened with a tool. An appropriate strain-relief assembly for the cable must be used.
Wall mounting outside of the control cabinet or housing does not fulfill the requirements of
the FM approval.
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WARNING
WARNING
WARNING
WARNING
WARNING
WARNING
SCALANCE W778-1 /W738-1
Operating Instructions, 07/2019, C79000-G8976-C450-04
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