Connecting up   
5.1 Safety when connecting up 
  SCALANCE X-200 
42  Operating Instructions, 03/2015, C79000-G8976-C284-06 
Safety notices when using the device according to Hazardous Locations (HazLoc) 
If you use the device under HazLoc conditions you must also keep to the following safety 
notices in addition to the general safety notices for protection against explosion: 
DO NOT DISCONNECT WHILE CIRCUIT IS LIVE UNLESS AREA IS KNOWN TO BE 
NON-HAZARDOUS. 
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: 
Take measures to prevent transient voltage surges of more than 40% of the rated voltage. 
This is the case if you only operate devices with SELV (safety extra-low voltage).