5 Connecting to power supply and bus system
Overview
Electronics compartment
Connection compartment
22
5.3
Wiring plan
1
Fig. 15: Position of connection compartment (Modbus electronics) and electron-
ics compartment (sensor electronics)
1
Connection compartment
2
Electronics compartment
( )
Fig. 16: Electronics compartment - double chamber housing
1
Internal connection to the connection compartment
2
For display and adjustment module or interface adapter
( )
4
Fig. 17: Connection compartment
1
USB interface
2
Slide switch for integrated termination resistor (120 Ω)
3
Modbus signal
4
Voltage supply
Terminal
Function
1
Voltage supply
4...20mA
+
1
2
5
6
(-)
1
1
USB
MODBUS
power supply
+
1
2
off on
3 4
(-)
VEGABAR 81 • Modbus and Levelmaster protocol
2
2
7 8
1
2
5
3
Polarity
+