VEGA VEGAMET 514 - Manual (Page 11)

VEGAMET 514 11
Electrical connection
3.1 Connection instructions
Note the following instructions for electrical
connection:
- The connection must be made acc. to the
local installation standards (e.g. in Ger-
many acc. to the VDE-regulations).
- The wiring between VEGAMET and sensor
can be done with standard two-wire cable.
- If strong electromagnetic interferences are
expected, screened cable is recom-
mended. The screening must be earthed
on both ends.
- The line resistances stated in the technical
data must not be exceeded.
- If overvoltages are expected, we recom-
mend a sensor electronics with integrated
overvoltage protection or the installation of
VEGA overvoltage arresters.
- The voltage supply of VEGAMET must
provide with extra-low voltage to ensure
protection class II. When using VEGASTAB
593 a reliable separation from the mains
circuits acc. to DIN VDE 0106, part 101 is
ensured.
3 Electrical connection
3.2 Connection instructions
for Ex approved applica-
tions
The signal conditioning instruments must be
generally mounted outside the hazardous
areas, or special Ex protective measures
must be taken.
Ex separating chamber
To ensure sufficient "air and creep distance",
an Ex separating chamber must be mounted
to the connections of VEGAMET. Lead the
cables through the Ex separating chamber
and connect them. Fasten the Ex separating
chamber with the lower screw. Note the
operating instructions of the carrier BGT 596
Ex.M.
Protection in Ex applications
In Ex applications a protection class of IP 20
must be maintained. To accomplish this,
cover the gaps or free modules from the front
with suitable blind covers.
Mounting in carriers
If you mount your VEGAMET with Ex ap-
proval in a carrier, you have to use a VEGA-
Ex module. Keep a distance of at least 10
mm (2 TE) to module cards of other manufac-
turers. If you want to mount VEGAMET at the
utmost left position in the carrier, you have to
mount a blind cover with at least 20 mm
(4 TE) in front of the module of the instrument.
CONNECT
%
100
+ -
OK ESC
on
1 2
Blind cover (4 TE)