User Manual

Connect the cable screen on both ends to ground
potential. In the sensor, the screen must be connected
directly to the internal ground terminal. The ground
terminal outside on the housing must be connected to
the potential equalisation (low impedance).
If potential equalisation currents are expected, the
connection on the evaluation side must be made via a
ceramic capacitor (e.g. 1 nF, 1500 V). The low
frequency potential equalisation currents are thus sup-
pressed, but the protective effect against high frequency
interference signals remains.
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 IfaPLICSCOM 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 into the sensor through the cable
entry
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
Cable screening and
grounding
Select connection
cable for Ex appli-
cations
VEGAPULS 68 - 4 ... 20 mA/HART 23
Connecting to power supply
29261-EN-050202