KROHNE DK 32-DK 34 ATEX II2G Ex i EN - Manual (Page 9)

ELECTRICAL CONNECTIONS
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DK32 DK34
www.krohne.com 11/2012 - 4000422303 AD DK32/34 II2G R03 en
Electrical connections
4.1 General notes
For version DK3./../../S/../A-Ex (plug), the separate intrinsically safe signal circuits with level of
protection "ia" or "ib" are electrically connected in the terminal compartment of the plug
housing and for version DK3./../../L/../A-Ex (connecting cable) it is the connecting cable as
illustrated in the connection diagram. Permissible maximum values (electrical data) must be
observed.
Connecting cable
The connecting cables must be selected according to prevailing installation standards (e.g.
EN 60079-14). The outer diameter of the connecting cable must be within the sealing range of
the cable entry. The connecting cables must be fixed and laid in such a way as to be sufficiently
protected against damage.
All cores that are not used must be securely connected to the earth potential of the hazardous
area or carefully insulated against each other and against earth (test voltage ≥ 500 V
eff
).
Cable entries / Blanking plugs
The DK3./../../S/../A-Ex variable area flowmeter is equipped with a connector. The connector
guarantees protection from foreign bodies and water (protection category) IP65 as per EN 60529.
The cable entry is closed with a plug. The plug is to be replaced with a suitable connecting cable
(nominal diameter range 6...9mm).
Connection diagrams
Contact connection Cable colors of assembled cable
1 Min minus white
2 Min plus yellow
3 Max minusMax minus green
4 Max plus brown
5 Lift slot
6 Fastening screw of connection box
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