KROHNE OPTISWITCH 5200C Namur EN - Manual (Page 16)

5 Connecting to voltage supply
5.1 Preparing the connection
Generally not 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 according to the following diagrams.
Take note of the general installation regulations. As a rule,
connect OPTISWITCH 5200 C, 5250 C to vessel ground (PA),
or in case of plastic vessels, to the next ground potential. On
the side of the instrument 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".
OPTISWITCH 5200 C, 5250 C 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
OPTISWITCH 5200 C, 5250 C.
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:
1 Unscrew the housing cover
2 Loosen compression nut of the cable entry
Note safety instructions
Take note of safety
instructions for Ex
applications
Select power supply
Selecting the connection ca-
ble
Select connection
cable for Ex applica-
tions
16 OPTISWITCH 5200 C, 5250 C - with NAMUR output
Connecting to voltage supply
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-EN
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