User's Manual

Caution:
No grease should be used when screwing the NPT cable
gland or steel tube into the threaded insert. Standard grease
can contain additives affecting the connection between
threaded insert and housing. This will influence the stability of
the connection and the tightness of the housing.
If screened cable is necessary, 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 on the outside of 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 the ceramic capacitor
(e.g. 1 nF, 1500 V). The low frequency potential equalisation
currents are thus suppressed, 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 equal-
isation 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 - Instrument housing
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 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
Cable screening and ground-
ing
Select connection
cable for Ex applica-
tions
26 VEGAPULS 62 - 4 ... 20 mA/HART
Connecting to power supply
28435-EN-060317