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Connecting up
5.5 Antennas
The antenna socket for connecting the antenna is of the type SMA. The antenna used should
have an impedance of about 50 ohms.
Minimum clearance to the device
The device may only be operated when the distance between the device (or antenna) and user
is at least 20 cm.
Notes on lightning protection
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 are protected by lightning
protection electrical bonding.
When implementing your lightning protection concept, make sure you adhere to the
requirements of the VDE 0182 or IEC 62305 standards.
Suitable lightning protectors are available in the range of accessories of SIMATIC NET
Industrial WLAN:
• Lightning protector LP798-1N (order no. 6GK5798-2LP00-2AA6)
• Lightning protector LP798-2N (order no. 6GK5798-2LP10-2AA6)
Note
We recommend that you use the maintenance-free lightning protector LP798-2N. Exception:
When there is also DC power supplied via the antenna cable. In this case, only the lightning
protector LP798-1N can be used.
• Depending on the connector, an adapter cable is required to connect to SMA.
Danger due to lightning strikes
Installing this lightning protector between an antenna and a SCALANCE M87x 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.
64
CAUTION
WARNING
WARNING
Operating Instructions, 02/2023, C79000-G8976-C331-12
SCALANCE M874, M876
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