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7. Starting, operation
For equipment with Ex nA nL certification, or if operated under nA nL condi-
„
tions: Do not separate when energized.
For products with FM Approval: The connection between cable and
„
Warning
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
by the following diagram.
Signal output and allowed load
4 ... 20 mA, 2-wire
permitted
range
Current for external display- or evaluation equipment can be supplied directly from the circuit,
when operating a transducer with current output. A voltage drop specific to the display unit is
to be considered. The UHP-display unit of type (N)WUR-1 has a specific voltage drop of 6 V.
The transducers are short-circuit-proof for a short time, but anyhow any incorrect connection
of the instrument should be avoided.
WIKA Operating instructions/Betriebsanleitung/Mode d'emploi/Instrucciones de servicio WUC-1X
Current output (2-wire)
4 ... 20 mA:
≤ (U+ – 10 V) / 0,02 A
R
A
Voltage output (3-wire)
0 ... 5 V:
R
0 ... 10 V:
R
with R
in Ohm and U+ in Volt
A
GB
) is illustrated
A
> 5 kOhm
A
> 10 kOhm
A
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