KROHNE OPTISWITCH 3000C NAMUR EN - Manual (Page 13)

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
Connect the power supply according to the following diagrams.
Take note of the general installation regulations. As a rule,
connect OPTISWITCH 3000 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.
The data for power supply are stated in the "Technical data" in
the "Supplement".
OPTISWITCH 3000 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 gland.
If cable with a different diameter or wire cross section is used,
exchange the seal or use an appropriate cable connection.
5.2 Connection steps
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 the opening lever of the terminals downward, 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
Note safety instructions
Select power supply
Selecting the connection ca-
ble
OPTISWITCH 3000 C - with NAMUR output 13
Connecting to voltage supply
31355
-EN
-060830