SCALANCE WxM766 
Operating Instructions, 03/2022, C79000-G8976-C617-03 
49 
Connection 
6.1  Safety when connecting up 
Safety notices 
When connecting up the device, keep to the safety notices listed below. 
Note 
Close unused sockets
 
Close all unused M12 sockets with protective caps (tightening torque at least 0.4 Nm) to 
achieve the specified type of protection.
 
Lightning protection 
 
 
WARNING 
Danger due to lightning strikes 
Antennas installed outdoors must be within the area covered by a lightning protection 
system. Make sure that all conducting systems entering from outdoors can be 
protected by a lightning protection potential equalization system. 
When implementing your lightning protection concept, make sure you adhere to the 
VDE 0182 or IEC 62305 standard. 
Suitable lightning protectors are available in the accessories (Page 28) of SIMATIC NET 
Industrial WLAN. 
Note 
We recommend that you use the maintena
nce-free lightning protector LP798-2N. 
Exception: When there is also DC power s
upplied via the antenna cable. In this case, 
only the lightning protector LP798
-1N can be used. 
 
WARNING 
Danger due to lightning strikes 
Installing this lightning protector between an antenna and a SCALANCE W device is not 
adequate protection against a lightning strike. The LP798-1N lightening protector only 
works within the framework of a comprehensive lightning protection concept. If you 
have questions, ask a qualified specialist company.