VEGA VEGABOX 02 - Manual (Page 11)

Fig. 2: Connection of VEGABOX 02 to the sensor
Take note of the corresponding installation regulations for Ex
applications.
If screened cable is necessary, connect the cable screen on both ends
to ground potential. In the VEGABOX 02, 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
processing side must be made via a ceramic capacitor (e. g. 1 nF,
1500 V). The low frequency potential equalisation currents are thus
suppressed, but the protective effect against high frequency interfer-
ence signals remains.
In Ex applications, one-sided grounding on the sensor is recommen-
ded, see EN 60079-14.
5 .2 Connection procedure
Proceed as follows:
Select connec-
tion cable for Ex
applications
Cable screening and
grounding
Cable screening and
grounding for Ex appli-
cations
VEGABOX 02 11
5 Connecting to power supply
32798
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EN
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