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Connection
5.1 Safety when connecting up
EXPLOSION HAZARD
Do not press the reset button if there is a potentially explosive atmosphere.
Suitable cables at high ambient temperatures
If the temperature of the cable or housing socket exceeds 70 °C or the branching point of
conductors exceeds 80 °C, special precautions must be taken.
If the device is operated at ambient temperatures of between 50 °C and 70 °C, only use
cables with a maximum permitted operating temperature of at least 80 °C.
General notes on use in hazardous areas according to UL-HazLoc
EXPLOSION HAZARD
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.
40
WARNING
WARNING
WARNING
SCALANCE W778-1 /W738-1
Operating Instructions, 07/2019, C79000-G8976-C450-04
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