Siemens SIMATIC NET SCALANCE W774-1 RJ-45 Operating Instructions Manual page 24

Connection
5.1 Lightning protection, power supply and grounding
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
SCALANCE W774-1/W734-1
Operating Instructions, 09/2015, C79000-G8976-C325-06