VEGA VEGAVIB S 61 - Manual (Page 15)

Filling opening
Mount the instrument in such a way that the
vibrating rod does not protrude directly into the
fi
lling stream.
Horizontal mounting
20°
a. b.
Fig. 10: Horizontal mounting
a Protective sheet
b Concave protective sheet for abrasive solids
4 C onnecting to power supply
4 .1
Preparing the connection
Note safety instructions
Always keep in mind the following safety instruc-
tions:
l
Connect only in the complete absence of line
voltage
l
Take note of safety instructions for Ex appli-
cations
Select power supply
Connect the power supply according to the
following diagrams. Oscillator VB60R is designed
in protection class 1. To maintain this protection
class, it is absolutely necessary that the ground
conductor be connected to the internal ground
terminal. Take note of the general installation
regulations. As a rule, connect VEGAVIB S 61 to
vessel ground (PA), or in case of plastic vessels, to
the next ground potential. On the side of the
housing there is a ground terminal between the
cable entries. This connection serves to drain off
electrostatic charges. In Ex applications, the
installation regulations for hazardous areas must
be given priority.
The data for voltage supply are specified in chapter
"Technical data" in the "Supplement".
Selecting connection cable
VEGAVIB S 61 is connected with standard four-
wire cable with round cross-section. An outer cable
diameter of 5 … 9 mm ensures the seal effect of
the cable entry.
If cable with a different diameter or wire cross
section is used, exchange the seal or use an
appropriate cable connection.
4 .2
Connection procedure
Proceed as follows:
1 Unscrew the housing cover
2 Loosen compression nut of the cable entry
3 Remove approx. 10 cm (4 in) of the cable
mantle, strip approx. 1 cm (0.4 in) insulation
from the ends of the individual wires
4 Insert the cable into the sensor through the
cable entry
5 Lift the opening levers of the terminals with a
screwdriver (see following illustration)
6 Insert the wire ends into the open terminals
according to the wiring plan
7 Press down the opening levers of the termi-
nals, you will hear the terminal spring closing
8 Check the hold of the wires in the terminals by
lightly pulling on them.
9 Tighten the compression nut of the cable entry.
The seal ring must completely encircle the
cable
10 If necessary, carry out a fresh adjustment
11 Screw the housing cover on
The electrical connection is finished.
VEGAVIB S 61 15
Connecting to power supply
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