SCALANCE XR-300WG 
Operating Instructions, 05/2017, C79000-G8976-C454-01 
27 
 
Safety notices for installation 
Safety notices 
When installing the device, keep to the safety notices listed below. 
 
 
If a device is operated in an ambient temperature of more than 40 °C, the temperature of 
the device housing may be higher than 70 °C. The device must therefore be installed so 
that it is only accessible to service personnel or users that are aware of the reason for 
restricted access and the required safety measures at an ambient temperature higher than 
40 ℃. 
 
If the device is installed in a cabinet, the inner temperature of the cabinet corresponds to 
the ambient temperature of the device. 
Safety notices on use in hazardous areas 
General safety notices relating to protection against explosion 
 
Replacing components may impair suitability for Class 1, Division 2 or Zone 2. 
 
 
The device is intended for indoor use only. 
 
The device may only be operated in an environment with pollution degree 1 or 2 (see IEC 
60664-1).