KROHNE DK 32-DK 34-DK 37 EN - Manual (Page 18)

4
ELECTRICAL CONNECTIONS
18
DK32 - DK34 - DK37
www.krohne.com 06/2014 - 4000287103 MA DK32-34-37-R05-en
4.5 DK37/M8E electrical signal output
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.
Figure 4-5: Electrical connection M8E
1 Terminal connection
2 Auxiliary power 14.8...30VDC
3 Measurement signal 4...20mA
4 External load, HART
® communication
Figure 4-6: Electrical connection with galvanic isolation
1 Terminal connection
2 Converter supply isolator with galvanic isolation
3 Auxiliary power (see supply isolator information)
4 Measurement signal 4...20mA
5 External load, HART
® communication
MA_DK32_34_37_R05_en_287103_PRT.book Page 18 Friday, June 6, 2014 11:42 AM