ELECTRICAL CONNECTIONS
4
29
H250 M40
www.krohne.com
03/2020 - 4000640706 - MA H250-M40 R06 en
4.2.2 Current output ESK4A
The connecting terminals of the ESK4A have a pluggable design and can be removed in order to
connect the cables.
Power supply ESK4A with galvanic 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 negatively affect 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.
Figure 4-6: ESK4A connection
1
Current output of ESK4A
2
Power supply 14...32 VDC (intrinsicallly safe max. 30 VDC)
3
Measuring signal 4...20 mA
4
External load, HART
®
communication
Figure 4-7: Power supply ESK4A with galvanic isolation
1
Terminal connection
2
Converter supply isolator with galvanic isolation
3
Power supply (refer to isolator information)
4
Measuring signal 4...20 mA
5
External load, HART
®
communication