DK32 - DK34 - DK37 - webadmin1.net
DK32 - DK34 - DK37 - webadmin1.net
DK32 - DK34 - DK37 - webadmin1.net
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4 ELECTRICAL CONNECTIONS<strong>DK32</strong> - <strong>DK34</strong> - <strong>DK37</strong>4.5 <strong>DK37</strong>/M8E electrical signal outputFigure 4-5: Electrical connection M8E1 Terminal connection2 Auxiliary power 14.8...30VDC3 Measurement signal 4...20mA4 External load, HART TM communicationThe circuitry for connection to other devices such as digital evaluator units or process controlequipment must be designed with especial care. In some circumstances internal connections inthese devices (e.g. GND with PE, ground loops) may lead to impermissible voltage potentials,which can compromise the function of the device itself or a connected device. In such cases aprotected extra-low voltage (PELV) is recommended.Figure 4-6: Electrical connection with galvanic isolation1 Terminal connection2 Converter supply isolator with galvanic isolation3 Auxiliary power (see supply isolator information)4 Measurement signal 4...20mA5 External load, HART TM communication18www.krohne.com07/2009 - 4000287102 MA <strong>DK32</strong>-34-37-R04-en
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