User's Manual

Connection
5.1 Lightning protection, power supply and grounding
SCALANCE W760/W720
Operating Instructions, 07/2013, C79000-G89xx-C322-01
19
Grounding
NOTICE
Damage to the device due to potential differences
To fully eliminate the influence of electromagnetic interference, the device must be
grounded. There must be no potential difference between the following parts, otherwise the
device or other connected device could be severely damaged:
• Housing of the SCALANCE W700 and the ground potential of the antenna.
• Housing of the SCALANCE W700 and the ground potential of a device connected over
Ethernet.
• Housing of the SCALANCE W700 and the shield contact of the connected Ethernet
cable.
Connect both grounds to the same foundation earth or use an equipotential bonding cable.
If it is used outdoors, the device must always be connected to protective earth.
WARNING
EXPLOSION HAZARD
SUBSTITUTION OF COMPONENTS MAY IMPAIR SUITABILITY FOR CLASS I, DIVISION
2 OR ZONE 2.
WARNING
EXPLOSION HAZARD
DO NOT OPEN WHEN ENERGIZED.
General notes on use according to ATEX
WARNING
EXPLOSION HAZARD
DO NOT CONNECT OR DISCONNECT EQUIPMENT WHEN A FLAMMABLE OR
COMBUSTIBLE ATMOSPHERE IS PRESENT.