Siemens SCALANCE W788C-2 Series Operating Instructions Manual page 32

Connection
5.2 Lightning protection, power supply and grounding
Grounding
Danger to life from overvoltage, fire hazard
When using outdoor antennas, the shared or even grounded pin of the circuit must be
connected to the shield of the coaxial cable and with all touchable conductive parts and
circuits. Otherwise, in the event of a fault there may be illegally high voltages on touchable
parts.
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
• Housing of the SCALANCE W700 and the shield contact of the connected Ethernet
Connect both grounds to the same foundation earth or use an equipotential bonding cable.
EXPLOSION HAZARD
Do not connect or disconnect cables to or from the device when a flammable or
combustible atmosphere is present.
General notes on use in hazardous areas according to UL-HazLoc
EXPLOSION HAZARD
Do not connect or disconnect while the circuit is live or unless the area is known to be free
of ignitible concentrations.
This equipment is suitable for use in Class I, Division 2, Groups A, B, C and D or non-
hazardous locations only.
This equipment is suitable for use in Class I, Zone 2, Group IIC or non-hazardous locations
only.
32
WARNING
Ethernet.
cable.
WARNING
WARNING
SCALANCE W788C-2
Operating Instructions, 01/2017, A5E03692120-11