E
LECTRICAL
CONNECTION
The ultrasonic level meter is designed to be connected to supply unit or to controller through a cable
with the outer diameter of 6 ÷ 8 mm (recommended cross-section of cores 0.5 ÷ 0.75 mm
2
) by means
of bolted clips placed under display module. Connect the plus pole (+U) to the terminal (+), the minus
pole to 0V to the terminal (-) and the shielding to
the terminal ( ) (only for shielded cables).
Procedure to connect the cable to the level
meter:
Unscrew the nut of the upper transparent lid.
1.
Take the upper edge of the display module and
2.
take it out carefully by mild swinging up.
If you cannot grasp the module, you can use
3.
a small screwdriver. Insert it as far as the
seam and use from several sides to slightly
lift the module.
Release the cable bushing and thread the
4.
stripped supply cable in.
Connect the cable into the bolted clips according
5.
to the diagram in Fig. 14.
Assemble the level meter and connect the
6.
cable to the sequential unit.
Fig. 14: Connection diagram of the
level meter
Fig. 15: Internal view of terminal
block
Make the electric connection in
voltage-free state
!
The power supply can be a stabilized voltage supply unit of 18 ÷ 36V DC (version Xi - 30 V DC) that
is included in evaluation or display unit.
Considering possible occurrence of
electrostatic charge
on non-conducting parts of the level me-
ter, it is necessary to
ground
all level meters intended for environments
with
risk of explosion
(ULM–70Xi–_ _–I). It will be done using a screw placed on the head of the level meter under the
cable bushing.
Display unit
connector
Terminal
block
Metal clip
