VEGA VEGABAR 81 Modbus and Levelmaster protocol - Quick setup guide - Manual (Page 10)

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4 Connecting to power supply and bus system
VEGABAR 81 • Modbus and Levelmaster protocol
46304-EN-131125
6. Check the hold of the wires in the terminals by lightly pulling on
them
7. Connect the screen to the internal ground terminal, connect the
outer ground terminal to potential equalisation in case of power
supply via low voltage
8. Connect the lead cable for power supply in the same way accord-
ing to the wiring plan, in addition connect the ground conductor to
the inner ground terminal when powered with mains voltage.
9. Tighten the compression nut of the cable glands. The seal ring
must completely encircle the cables
10. Screw the housing cover back on
The electrical connection is finished.
Information:
The terminal blocks are pluggable and can be removed from the
housing insert. To do this, lift the terminal block with a small screwdriv-
er and pull it out. When inserting the terminal block again, you should
hear it snap in.
4.2 Wiring plan
2
1
Fig. 4: Position of connection compartment (Modbus electronics) and electron-
ics compartment (sensor electronics)
1 Terminal compartment
2 Electronics compartment
+
+
power supply
MODBUS
D0 D1 IS GND
USB
1
2
4 3
1 3 4 5 2 off on ( )
(
)
(-)
(-)
Fig. 5: Terminal compartment
1 USB interface
2 Slide switch for integrated termination resistor (120 Ω)
3 Voltage supply
4 Modbus signal
Overview
Terminal compartment