Siemens SCALANCE W784-1 Compact Operating Instructions page 81

Interruption of the power supply
CAUTION
Damage to the Ethernet interface
Repeated fast removal and insertion of the Ethernet cable when using Power-over-Ethernet
and when there is a redundant power supply can cause damage to the Ethernet interface.
Avoid repeatedly removing and inserting the Ethernet cable when using Power-over-
Ethernet and a redundant power supply.
SCALANCE W-784-1xx / SCALANCE W-74x-1
Operating Instructions (Compact), Release 08/2007, A5E01174713-02
5.1 Lightning protection, power supply, and grounding
Connecting up
75