Siemens SCALANCE W778-1 Operating Instructions Manual page 38

Connection
5.1 Safety when connecting up
General notes on use according to ATEX and IECEx
EXPLOSION HAZARD
DO NOT CONNECT OR DISCONNECT EQUIPMENT WHEN A FLAMMABLE OR
COMBUSTIBLE ATMOSPHERE IS PRESENT.
EXPLOSION HAZARD
Do not press the reset button if there is a potentially explosive atmosphere.
General notes on use in hazardous areas according to UL-HazLoc
EXPLOSION HAZARD
DO NOT DISCONNECT WHILE CIRCUIT IS LIVE UNLESS AREA IS KNOWN TO BE
NON-HAZARDOUS.
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.
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WARNING
WARNING
WARNING
SCALANCE W778-1 /W738-1
Operating Instructions, 01/2107, C79000-G8976-C450-01