VEGA VEGAWELL 51 4 … 20 mA_HART - Manual (Page 17)

U se cable with round cross-section. A cable outer diameter of
5 … 9 mm (0.2 … 0.35 in) ensures the seal effect of the cable
gland. If you are using cable with other diameter or cross-
section, you have to exchange the seal or use a suitable cable
gland.
1
2
Fig. 5: Connect VEGAWELL 51 to power supply
1 Direct connection
2 Connection via VEGABOX 02
I
f screened cable is necessary, connect the cable screen on
both ends to ground potential. In the plastic housing, in
VEGABOX
02 or in VEGADIS 12, 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.
I f 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 interference signals remains.
Cable screening and
grounding
VEGAWELL 51 • 4 … 20 mA/HART 17
C onnecting to power supply
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EN
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