KROHNE H250 M40 EN - Manual (Page 27)

ELECTRICAL CONNECTIONS
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H250 M40
www.krohne.com 11/2012 - 4000640702 MA H250 M40 R02 en
4.2.2 Current output ESK4
The connecting terminals of the ESK4 have a pluggable design and can be removed in order to
connect the cables.
Power supply M40 with electrical isolation Power supply M40 with electrical isolation Power supply M40 with electrical isolation Power supply M40 with electrical isolation
Wiring must be planned with great care when it comes to connecting other devices such as
evaluation units or process control. Internal connections in these devices (e.g. GND with PE,
mass loops) may lead to non-permitted voltage potentials which could impair the function of the
converter itself or that of a device connected to it. In such cases a protected extra-low voltage
(PELV) is recommended.
ESK4 connection
1 ESK4A current output
2 Power supply 14...30 VDC
3 Measuring 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 Measuring signal 4...20 mA
5 External load, HART
® communication
MA_H250_M40_R02_en_640702_PRT.book Page 27 Wednesday, November 28, 2012 12:23 PM