VEGA VEGATOR 632 - Manual (Page 12)

5 Connecting to power supply
5 .1 Preparing the connection
Always keep in mind the following safety instructions:
l Connect only in the complete absence of line voltage
l If overvoltage surges are expected, overvoltage arresters should
be installed
Tip:
We recommend VEGA overvoltage arresters B61-300 (power supply
VEGATOR
632) and B62-36G (sensor supply).
In hazardous areas you must take note of the respective regulations,
conformity and type approval certificates of the sensors and power
supply units.
The power supply can be 85 … 253 V AC, 50/60 Hz or 20 … 60 V DC.
The operating voltage of VEGATOR 632 is connected with standard
cable according to the national installation standards. The line
resistance must be max. 25 Ω per wire. If electromagnetic interference
is expected which is above the test values of EN 61326 for industrial
areas, screened cable should be used.
If screened cable is necessary, connect the cable screen on both ends
to ground potential. In the sensor, 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.
Take note of the corresponding installation regulations for Ex
applications.
Note safety instructions
Take note of sa-
fety instructions
for Ex applica-
tions
Select power supply
Selecting connection
cable
Cable screening and
grounding
Select connec-
tion cable for Ex
applications
12 VEGATOR 632 • Signal conditioning instrument
5 Connecting to power supply
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-EN
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