Connecting up
6.1 Safety when connecting up
SCALANCE W788-x / W748-1
48 Operating Instructions, 03/2022, A5E03678333-17
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 use the lightning protector LP798
-1N.
WARNING
Danger due to lightning strikes
Installing this lightning protector between an antenna and a SCALANCE W700 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.
Note
The requirements of EN61000
-4-5, surge immunity tests on power supply lines, are met
only when a Blitzductor is used with 24 VDC:
Manufacturer: DEHN+SÖHNE GmbH+Co.KG, Hans
Dehn Str. 1, Postfach 1640, D -
92306 Neumarkt, Germany
Supply voltage
WARNING
The device is designed for operation with a directly connectable safety extra low
voltage (SELV) from a limited power source (LPS).
The power supply therefore needs to meet at least one of the following conditions:
• Only safety extra low voltage (SELV) with limited power source (LPS) complying
with IEC 62368-1 / EN 62368-1 / VDE 62368-1 can be connected to the power
supply terminals.
• The power supply unit for the device must meet NEC Class 2 according to the
National Electrical Code (r) (ANSI / NFPA 70).
If the equipment is connected to a redundant power supply (two separate power
supplies), both must meet these requirements.
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