KROHNE H250 M8-M9-M10 EN - Manual (Page 27)

ELECTRICAL CONNECTIONS
4
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H250
www.krohne.com 04/2011 - 4000269302 MA H250-R02 en
4.3.2 Indicator M9 - current output ESK2A
The connecting terminals of the ESK2A have a pluggable design and can be removed in order to
connect the cables.
Power supply M9 with electrical isolation
The circuitry for connection to other devices such as digital evaluator units or process control
equipment must be designed with especial care. In some circumstances internal connections in
these 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 a
protected extra-low voltage (PELV) is recommended.
1 ESK2A current transmitter
2 Power supply 12...30VDC
3 Measurement signal 4...20 mA
4 External load, HART
® communication
1 Terminal connection
2 Converter supply isolator with electrical isolation
3 Power supply (see supply isolator information)
4 Measurement signal 4...20mA
5 External load, HART
® communication
MA_H250_R02_en_269302_PRT.book Page 27 Tuesday, April 12, 2011 10:17 AM