11384850.09 EN/DE 02/2019
12
WIKA Operating instructions / Betriebsanleitung, WUC-1x
7. Starting, operation
EN
■
If long connecting cables (greater than 30m) or leads outside buildings are to be used, use screened leads.
Note that with plug connectors, no connection between cable screen and housing is possible. Take care, there-
fore, for installations in explosion hazard areas, that equipotential bonding is used.
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. Also provide for equipotential bonding here, if
necessary.
■
Ensure that the cable diameter you select fits to the cable gland of the connector Ensure 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).
■
Please make sure that the ends of cables with flying leads do not allow any ingress of moisture.
■
The transducer must be connected and operated in accordance with the approriate 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 certification, or if operated under nA ic conditions: Do not separate when
energized.
■
For products with FM Approval: The connection between cable and connector shall withstand a tensile force of
min. 15 N
The transducer is designed to operate with an input voltage of 10 ... 30 VDC / 14 ... 30 with output signal 0 ... 10 V. The
voltage value Ui = 30 VDC shall not be exceeded in the current loop circuit. The interrelationship between voltage supply and
load resistor (R
A
) is illustrated by the following diagram.
Signal output and allowed load
4 ... 20 mA, 2-wire
permitted range
Current output (2-wire)
4 ... 20 mA:
R
A
≤ (U+ – 10 V) / 0,02 A
Voltage output (3-wire)
0 ... 5 V: R
A
> 5 kΩ
0 ... 10 V: R
A
> 10 kΩ
with R
A
in Ohm and U+ in Volt
