Siemens SCALANCE M804PB Operating Instructions Manual page 38

Connecting up
5.1 Safety when connecting up
Safety notices on use in hazardous areas
General safety notices relating to protection against explosion
EXPLOSION HAZARD
DO NOT CONNECT OR DISCONNECT EQUIPMENT WHEN A FLAMMABLE OR
COMBUSTIBLE ATMOSPHERE IS PRESENT.
Safety notices for use according to ATEX and IECEx
If you use the device under ATEX or IECEx conditions you must also keep to the following
safety notices in addition to the general safety notices for protection against explosion:
Take measures to prevent transient voltage surges of more than 40% of the rated voltage.
This is the case if you only operate devices with SELV (safety extra-low voltage).
EXPLOSION HAZARD
Do not press the SET button if there is a potentially explosive atmosphere.
LAN connection (Local Area Network)
A LAN or LAN segment with all the interconnected devices should be contained completely
in a single low voltage power distribution system in a building. The LAN is designed either
for "Environment A" according to IEEE802.3 or "Environment 0" according to IEC TR
62102.
Do not connect any electrical connectors directly to the telephone network (Telephone
Network Voltage) or a WAN (Wide Area Network).
38
WARNING
WARNING
WARNING
WARNING
Operating Instructions, 07/2018, C79000-G8976-C496-01
SCALANCE M804PB