Siemens SCALANCE X-400 Operating Instructions Manual page 78

Installation
4.1 Safety notices for installation
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:
To comply with EC Directive 94/9 (ATEX95) or the conditions of IECEx, this enclosure or
cabinet must meet the requirements of at least IP54 in compliance with EN 60529.
Requirements for the cabinet/enclosure
The fiber-optic bus connections labeled SCALANCE MM400 (see type plate) may also be
led through a hazardous area zone1 (see chapterApprovals (Page 133), section "ATEX").
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 70 °C, only use cables with a permitted operating
temperature of at least 80 °C.
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WARNING
WARNING
WARNING
Operating Instructions, 06/2015, C79000-G8976-C186-12
SCALANCE X-400