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5. Electrical installation
WARNING
When using devices with connector terminals, implement connections such that the
separation distances are in compliance with standards and connecting lines cannot
become disconnected.
Electrically connect the device in accordance with the specifications given on the type
plate, the following connection table and the connection diagram:
Connection assignment table:
Electrical connections
Supply + (Ub+)
Supply / test – (Ub-)
Connection diagrams:
2-wire (current) HART
Supply +
p
Supply -
I
Where the cabling is laid in a fixed position, a minimum bend radius of 10 times the
diameter must be observed; for flexible use, the limit is 20 times the diameter.
In order to electrically connect the device with connector terminals, the cover must
be unscrewed. If the device has a display and control unit, this unit must be careful-
ly pulled out. Place it next to the housing during installation such that there is no
strain on any connections. Afterwards, carefully plug it back in and make sure that
the connecting wires are not twisted or pinched. Before screwing the cover back on,
be sure to check the O-rings and sealing surfaces on the housing for damage and
replace them if necessary! Then screw the cover on by hand, and make certain that
the field housing is tightly sealed again.
Use a shielded and twisted multicore cable for the electrical connection.
24
Danger of death from electric shock
Switch off the power supply before
-
installing the device!
Connection terminals
Test +
Ground
system
+
-
TEST+
U
B
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