WIKA WU-20 Mode D'emploi page 12

7. Starting, operation
Electrical connection
WARNING!
Connect the enclosure to ground through the process connection, against electromagnetic
EN
fields and electrostatic discharge.
WARNING!
Specific conditions for safe use in explosive atmosphere:
External earthing connection shall be established by end-user via pressure connection
■
minimum 4 mm² required. External earthing connection shall be corrosion resist and
locked against rotation.
The connector provided by the end user in the end use application shall be in accordance
■
with all applicable clauses of EN/IEC 60079-0, EN/IEC 60079-7 and EN/IEC 60079-15. A
minimum degree of protection IP54 according to EN/IEC 60529 shall be ensured.
Cable provided by end-user shall be suitable for the ambient temperature.
■
The sub-D version has to be installed in a way that it is protected against an impact energy
■
of more than 4 J. The connector as well as the corresponding sealing are provided by the
end user in the end use application and shall be in accordance with all applicable clauses
of EN/ IEC 60079-0, EN/IEC 60079-7 and EN/IEC 60079-15. A minimum degree of protec-
tion IP54 according to EN/IEC 60529 shall be ensured.
The equipment shall only be used in an area with a maximum pollution degree of 2, as
■
defined in EN/IEC 60664-1.
12 WIKA operating instructions, model WU-2x