Connecting up
5.2 Lightning protection, power supply and grounding
SCALANCE W788-x / W748-1
38 Operating Instructions, 09/2017, A5E03678333-12
General notes on use according to ATEX and IECEx
Do not connect or disconnect cables to or from the device when a flammable or
combustible atmosphere is present.
Do not press the reset button if there is a potentially explosive atmosphere.
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).
General notes on use in hazardous areas according to UL-HazLoc
You may only connect or disconnect cables carrying electricity when the power supply is
switched off or when the device is in an area without inflammable gas 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.
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