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7 . e
lecTrical connecTion
The level meter is connected to consequential (evaluating) device with a suitable cable with the
outer diameter of 6 to 8 mm using screw terminals located under the display module. The recom-
mended cross section of cores for the current version 2 x 0,5 ÷ 0,75 mm
Modbus communication 2 x 2 x 0,25 mm
shielded). Plus pole (+U) is connected to the terminal
( + ), minus pole (0 V) to the terminal (-) and the shielding
(only for shielded cables) to the terminal ( ). Commu-
nication wires A and B of the line RS-485 (for version
"M" - Modbus) are connected to the terminals A and B.
Procedure to connect the cable to the level meter:
1.
Unscrew the nut of the upper transparent lid.
2.
Take the upper edge of the display module and
take it out carefully by mild swinging up.
3.
If you cannot grasp the module, you can use
a small screwdriver. Insert it as far as the seam and
use from several sides to slightly lift the module.
4.
Release the cable outlet and thread the stripped
supply cable in.
5.
Connect the cable to the screw terminals accord-
ing to the diagram in Fig. 17 or 18. Firmly tighten
the terminals and the cable outlet.
6.
If the level meter with Modbus is involved as a
terminal for RS-485, we recommend (to avoid re-
flections on the line) to connect 120Ω termination
resistor. This is done by moving a small lever of
the switch marked 120Ω to the ON position. On the
level meters connected to the line RS-485 as an
intermediate device, the termination resistors are
not connected (switch remains off).
7.
Insert the display module back into the head so
that the connector is properly connected.
8.
Slide silicone seal on the thread of the level meter
body, then tighten the nut of the upper lid. Connect
the cable to consequential device.
Electrical connection must be done in de-energized state!
With regard to possible occurrence of electrostatic charge on non-conductive parts of the
level meter, all level meters for explosive spaces (UPS–70Xi type) must be grounded. It
will be done using a screw placed on the head of the level meter under the cable outlet.
9
2
(twisted pair,
Fig. 16: Wiring diagram of the level meter
with current output UPS 1000 _-_-_- I
metal clip
Fig. 17: Inside view of screw terminals of the
level meter with current output UPS 1000_-_-_-I
Fig. 18: Wiring diagram of the level
meter with Modbus UltraPro
metal clip
+
Fig. 19: Inside view of screw terminals of the
level meter with Modbus UPS 1000_-_-_-M
and for the version with
2
display unit connector
Terminal block
1000_-_-_-M
display unit connector
120
ON
120Ω switch
A B
IS
GND
Terminal block
Ultrapro-1000
© Levelpro, s.r.o.
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