Electrical Connection - WIKA WUD-20 Betriebsanleitung

7. Initial start-up and operation

Electrical connection

WARNING!
Connect the enclosure to ground through the process connection, against electromagnetic fields and electro-
static discharge.
Use only shielded cables. Note that with connectors no connection between cable shield and housing is
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possible. For instruments with cable outputs, the cable is always shielded. Depending upon the design
(ordered version) the screen may or may not be connected with the enclosure. An additional equipotential
bonding maybe required.
Ensure that the cable diameter you select fits to the cable gland of the connector Ensure that the cable gland of
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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 pressure transducer must be connected and operated in accordance with the approriate regulations.
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Take care to ensure that the electrical connection (e.g. M12 connector) is correctly made (fully sealed).
WIKA's pressure transducers are designed to operate with an input voltage of DC 10 ... 30 V for output signals 4 ... 20 mA
and 0,5 V / DC 14 ... 30 V for output signal 0 ... 10 V. The interrelationship between voltage supply and load resistor (R
illustrated by the following diagram.
Signal output and allowed load
4 ... 20 mA, 3-wire
permitted range
Operating instructions/Betriebsanleitung, WUD-2x
Downloaded from www.Manualslib.com manuals search engine
Current output (3-wire)
4 ... 20 mA:
R ≤ (U+ – 10 V) / 0,02 A
A
Voltage output (3-wire)
0 ... 5 V: R > 5 kOhm
A
0 ... 10 V: R > 10 kOhm
A
with R in Ohm and U in Volt
A +
GB
) is
A
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