VEGA VEGAVIB 67 - contactless electronic switch - Manual (Page 16)

5 Connecting to power supply
5.1 Preparing the connection
Always observe the following safety instructions:
l
Connect only in the complete absence of line voltage
In hazardous areas you should take note of the appropriate
regulations, conformity and type approval certificates of the
sensors and power supply units.
Connect the power supply acc. to the following diagrams.
Oscillator VB60C 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 67 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 power supply are stated in the "Technical data" in
the "Supplement".
VEGAVIB 67 is connected with standard cable with round
cross-section. An outer cable diameter of 5 … 9 mm
(0.2 … 0.35 in) 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.
In hazardous areas, only use approved cable connections for
VEGAVIB 67.
Take note of the corresponding installation regulations for Ex
applications.
5.2 Connection steps
With Ex instruments, the housing cover may only be opened if
there is no explosive atmosphere present.
Proceed as follows:
Note safety instructions
Take note of safety
instructions for Ex
applications
Select power supply
Select connection cable
Select connection
cable for Ex applica-
tions
16 VEGAVIB 67 - with contactless electronic switch
Connecting to power supply
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