Operating Instructions - VEGAPULS 54K enamel
Operating Instructions - VEGAPULS 54K enamel
Operating Instructions - VEGAPULS 54K enamel
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24 101-EN-041227<br />
Electrical connection<br />
Measuring system with <strong>VEGAPULS</strong> <strong>54K</strong> on active PLC<br />
Two-wire technology, power supply from active PLC.<br />
Output signal 4 … 20 mA (passive).<br />
Measured value display integrated in the sensor.<br />
Optional external indicating instrument (can be mounted up to 25 m away from the sensor in<br />
Ex area).<br />
Adjustment with PC, HART ® handheld or the adjustment module MINICOM (can be plugged<br />
into the sensor or into the external indication instrument).<br />
VEGADIS 50<br />
4 2<br />
2 1)<br />
4 … 20 mA<br />
2<br />
2<br />
VEGA-<br />
CONNECT 2<br />
passive 2)<br />
1) If the resistance of the processing systems<br />
connected to the 4 … 20 mA signal output is less<br />
than 200 Ω, a resistor must be connected to the<br />
connection cable during adjustment to get a loop<br />
resistance of 250 Ω up to 350 Ω.<br />
The digital adjustment signal would otherwise be<br />
severely damped or short-circuited due to<br />
insufficient resistance of the connected processing<br />
system. Digital communication with the PC<br />
would not be ensured.<br />
HART ® handheld<br />
PLC (active) 3)<br />
2) 4 … 20 mA passive means that the sensor<br />
consumes a level-dependent current of<br />
4 … 20 mA. The sensor reacts electrically like a<br />
varying resistor (consumer) to the PLC.<br />
3) 4 … 20 mA active means that the PLC delivers a<br />
level-dependent current of 4 … 20 mA. The PLC<br />
reacts electrically like a current source.<br />
<strong>VEGAPULS</strong> <strong>54K</strong> <strong>enamel</strong> 21
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