VEGA VEGAMET 602 - Manual (Page 12)

12 VEGAMET 601, 602
Electrical connection
3 Electrical connection
3.1 Connection instructions
The following wiring plans are valid for stand-
ard as well as Ex versions of the signal con-
ditioning instruments. Please observe the
following instructions:
- the relay contact of VEGAMET 602 Ex is
shown in a de-energised condition
- if strong electromagnetic interferences are
expected, we recommend the use of
screened signal cables
- the screening must be earthed only on one
side (sensor side)
- in case of overvoltages, we recommend
the use of VEGA overvoltage arresters
- the connection must be made acc. to the
respective national installation standards
(e.g. in Germany acc. to the VDE regula-
tions).
3.2 Connection instructions
for approved applications
The following applications require the use of
certified instruments:
- in hazardous areas (if necessary, observe
special national regulations)
- as part of an overfill protection system acc.
to WHG
- in the shipbuilding industry
- in pressurised vessels.
For these applications, the respective official
documents (test reports, test certificates,
general type approval, type approval certifi-
cate and conformity certificates) as well as
the valid installation and operating regulations
must be noted. The official documents are
supplied with the respective instrument.
In Ex applications, the voltage supply of the
sensor must only be made via an intrinsically
safe circuit. These are the possibilities:
- VEGAMET series 600 signal conditioning
instrument in Ex version
- not certified VEGAMET series 600 signal
conditioning instrument with VEGA safety
barrier type 145
The official documents of these additional
instruments must also be noted.