WIKA WU-20 Mode D'emploi page 13

7. Starting, operation
If long connecting cables (greater than 30m) or leads outside buildings are to be used, use
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shielded wires. Note that with plug connectors, no connection between cable screen and
housing is possible. Take care, therefore, for installations in explosion hazard areas, that
equipotential bonding is used.
For instruments with cable outputs, the cable is always shielded. Depending upon the
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design (ordered version) the screen may or may not be connected with the enclosure. Also
provide for equipotential bonding here, if necessary.
Ensure that the cable diameter you select fits to the cable gland of the connector Ensure
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that the cable gland of the mounted connector is positioned correctly and that the sealings
are available and undamaged. Tighten the threaded connection and check the correct
position of the sealings in order to ensure the ingress protection
Cover flying leads with fine wires by an end splice (cable preparation).
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Please make sure that the ends of cables with flying leads do not allow any ingress of moisture.
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The transducer must be connected and operated in accordance with the approriate
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regulations. Take care to ensure that the electrical connection (e.g. M12 connector) is
correctly made (fully sealed).
WARNING!
For equipment with Ex nA ic and Ex ec ic certification, or if operated under nA ic or ec ic
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conditions: Do not separate when energised.
For products with FM Approval: The connection between cable and connector shall
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withstand a tensile force of min. 15 N
The transducer is designed to operate with an input voltage of DC 10 ... 30 V / DC 14 ... 30 V with output
signal 0 ... 10 V. The voltage value Ui = DC 30 V shall not be exceeded in the current loop circuit. The
interrelationship between voltage supply and load resistor (RA) is illustrated by the following diagram.
WIKA operating instructions, model WU-2x
EN
13