Siemens SIMATIC NET SCALANCE XR-300WG Operating Instructions Manual page 36

Installation
5.1 Safety notices for installation
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.
Safety notices for use according to ATEX and IECEx
If you use the device under ATEX or IECEx conditions you must also keep to the following safety
notices in addition to the general safety notices for protection against explosion:
The equipment shall only be used in an area of not more than pollution degree 2, as defined in
EN/IEC 60664-1.
Requirements for the cabinet/enclosure
The equipment shall be installed in a suitable enclosure that provides a degree of protection not
less than IP54 in accordance with EN/IEC 60079-15.
If the temperature of the cable or housing socket exceeds 70 °C or the branching point of
conductors exceeds 80 °C, special precautions must be taken. If the equipment is operated in
an air ambient in excess of 50 °C to 60 °C, only use cables with a permissible operating
temperature of at least 85 °C.
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:
To fulfill the requirements of the FM approval rack mounting is only possible in a vent free, tool-
secured enclosure.
Substitution of components may impair suitability for Division 2.
36
WARNING
WARNING
WARNING
WARNING
WARNING
WARNING
Operating Instructions, 03/2021, C79000-G8976-C454-07
SCALANCE XR-300WG