WIKA WU-26 - Manual (Page 12)

12 WIKA Operating instructions/Betriebsanleitung/Mode d'emploi/Instrucciones de servicio, WU-2X
11553678.02 GB/D/F/E 10/2012
Current output (2-wire)
4 ... 20 mA:
RA ≤ (U+ – 10 V) / 0,02 A
Voltage output (3-wire)
0 ... 5 V: RA > 5 kOhm
0 ... 10 V: RA > 10 kOhm
with RA in Ohm and U+ in Volt
Current for external display- or evaluation equipment can be supplied directly from the circuit, when operat-
ing 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.
WARNING!
■ For equipment with Ex nA nL certification, or if operated under nA nL 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 ... 31 VDC / 14 ... 31 with output signal
0 ... 10 V. The voltage value Ui = 31 VDC shall not be exceeded in the current loop circuit. The interrelation-
ship between voltage supply and load resistor (RA) is illustrated by the following diagram.
Signal output and allowed load
4 ... 20 mA, 2-wire
7. Starting, operation GB
permitted range