Burkert 8137 Manuel D'instructions page 22

5 Connecting to power supply
Select connec-
tion cable for Ex
applications
22
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Take note of the corresponding installation regulations for Ex
applications. In particular, make sure that no potential equalisation
currents flow over the cable screen. In case of grounding on both sides
this can be achieved by the use of a capacitor or a separate potential
equalisation.
5.2 Connection procedure
Proceed as follows:
1
Unscrew the housing cover
2
If an indicating and adjustment module is installed, remove it by
turning it slightly to the left.
3
Loosen compression nut of the cable entry
4 Remove approx. 10 cm (4 in) of the cable mantle, strip approx.
1 cm (0.4 in) insulation from the ends of the individual wires
5
Insert the cable through the cable gland into the sensor
6
Lift the opening levers of the terminals with a screwdriver (see
following illustration)
7
Insert the wire ends into the open terminals according to the wiring
plan
8
Press down the opening levers of the terminals, you will hear the
terminal spring closing
9
Check the hold of the wires in the terminals by lightly pulling on
them
10 Connect the screen to the internal ground terminal, connect the
outer ground terminal with potential equalisation
11 Tighten the compression nut of the cable entry. The seal ring must
completely encircle the cable
12 Screw the housing cover on
LEVEL TRANSMITTER 8137 • 4 ... 20 mA/HART