VEGA VEGATOR 631 Ex - Manual (Page 13)

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
631 Ex) and B62-36G (sensor supply).
In hazardous areas you should take note of the appropriate
regulations, conformity and type approval certificates of the sensors
and power supply units.
The power supply can be 20 … 253 V AC, 50/60 Hz or 20 … 72 V DC.
Power supply of VEGATOR 631 Ex is connected with standard cable
according to the national installation standards.
The sensors are connected with standard two-wire cable without
screen. If electromagnetic interference is expected which is above the
test values of EN 61326 for industrial areas, screened cable should be
used.
From a cable length of 50 m use one cable for each signal conditioning
instrument.
If you are using a common cable, the min. and max. cables must be
screened. The screen must be connected the ground on both sides.
Take note of the corresponding installation regulations for Ex
applications.
5 .2 Connection procedure
Move on to electrical connection and proceed as follows:
1 Snap the socket without VEGATOR 631 Ex onto the carrier rail
2 Connect the sensor cable to terminal 1 and 3 (see the following
wiring plans)
3 Connect power supply (switched off) to terminal 9 and 10
4 Insert VEGATOR 631 Ex into the plug-in socket and screw it down
tightly
The electrical connection is finished.
Note safety instructions
Take note of
safety instruc-
tions for Ex ap-
plications
Select power supply
Selecting connection
cable
Cable screening and
grounding
Select connec-
tion cable for Ex
applications
VEGATOR 631 Ex • Signal conditioning instrument 13
5 Connecting to power supply
23440
-EN
-090130