Vega VEGAWELL 52 Operating Instructions Manual page 16

5 Connecting to power supply
Cable screening and
grounding
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Fig. 9: Connect VEGAWELL 52 to voltage supply
1 Direct connection
2 Connection via VEGABOX 03
3 Connection via housing
If shielded cable is required, we recommend connecting the cable
screening on both ends to ground potential. In the connection hous-
ing of the sensor or in VEGABOX, the shielding must be connected
directly to the internal ground terminal. The ground terminal on the
outside of the housing must be connected to the ground potential (low
impedance).
In Ex systems, the grounding is carried out according to the installa-
tion regulations.
In electroplating plants as well as plants for cathodic corrosion protec-
tion it must be taken into account that significant potential differences
exist. This can lead to unacceptably high currents in the cable screen
if it is grounded at both ends.
Information:
The metallic parts of the instrument (process fitting, sensor, concen-
tric tube, etc.) are connected with the internal and external ground
terminal on the housing. This connection exists either directly via
the conductive metallic parts or, in case of instruments with external
electronics, via the screen of the special connection cable.
You can find specifications on the potential connections inside the
instrument in chapter " Technical data".
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VEGAWELL 52 • 4 ... 20 mA/HART Pt 100