Assembly and disassembly   
5.1 Safety notices for installation 
  SCALANCE WxM766 
38  Operating Instructions, 03/2022, C79000-G8976-C617-03 
 
WARNING 
If the device is installed in a cabinet, the inner temperature of the cabinet corresponds 
to the ambient temperature of the device. 
 
 
WARNING 
The device is intended for indoor use only. 
Safety notices on use in hazardous areas 
General safety notices relating to protection against explosion 
 
 
WARNING 
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. 
 
 
WARNING 
Replacing components may impair suitability for Class 1, Division 2 or Zone 2. 
 
 
WARNING 
The device may only be operated in an environment of contamination class 1 or 2 (see 
EN/IEC 60664-1, GB/T 16935.1). 
Notes for use in hazardous locations according to ATEX, IECEx, UKEX and CCC Ex 
If you use the device under ATEX, IECEx, UKEX or CCC Ex conditions you must also keep 
to the following safety instructions in addition to the general safety instructions for 
protection against explosion: 
 
 
WARNING 
To comply with EU Directive 2014/34 EU (ATEX 114), UK-Regulation SI 2016/1107 or 
the conditions of IECEx or CCC-Ex, the housing or cabinet must meet the requirements 
of at least IP54 (according to EN/IEC 60529, GB/T 4208) in compliance with EN 
IEC/IEC 60079-7, GB 3836.8.