94 Connecting to power supply and bus systemVEGABAR 82 • Modbus and Levelmaster protocol46311-EN-1602126. Check the hold of the wires in the terminals by lightly pulling onthem7. Connect the screen to the internal ground terminal, connect theouter ground terminal to potential equalisation in case of powersupply via low voltage8. Connect the lead cable for power supply in the same way accord-ing to the wiring plan, in addition connect the ground conductor tothe inner ground terminal when powered with mains voltage.9. Tighten the compression nut of the cable glands. The seal ringmust completely encircle the cables10. Screw the housing lid back onThe electrical connection is finished.Information:The terminal blocks are pluggable and can be removed from thehousing insert. To do this, lift the terminal block with a small screwdriv-er and pull it out. When inserting the terminal block again, you shouldhear it snap in.4.2 Wiring plan21Fig. 4: Position of connection compartment (Modbus electronics) and electron-ics compartment (sensor electronics)1 Terminal compartment2 Electronics compartment++power supplyMODBUSD0D1IS GNDUSB124 31 3 4 52 off on( )( )(-)(-)Fig. 5: Terminal compartment1 USB interface2 Slide switch for integrated termination resistor (120 Ω)3 Modbus signal4 Voltage supplyOverviewTerminal compartment