VEGA VEGABAR 82 Modbus and Levelmaster protocol - Operating Instructions - Manual (Page 27)

27
5 Connecting to power supply and bus system
VEGABAR 82 • Modbus and Levelmaster protocol
46294-EN-131107
+
+
power supply
MODBUS
D0 D1 IS GN
D
USB
1
2
4 3
1 3 4 5 2 off on ( )
(
)
(-)
(-)
Fig. 25: Connection compartment
1 USB interface
2 Slide switch for integrated termination resistor (120 Ω)
3 Voltage supply
4 Modbus signal
Terminal Function Polarity
1 Voltage supply +
2 Voltage supply -
3 Modbus-Signal D0 +
4 Modbus-Signal D1 -
5 Function ground with installa-
tion according to CSA
5.5 Switch-on phase
After connecting the instrument to power supply or after a voltage
recurrence, the instrument carries out a self-check for approx. 10 s:
•
Internal check of the electronics
•
Indication of the instrument type, hardware and software version,
measurement loop name on the display or PC
•
Indication of a status message on the display or PC
•
The output signal jumps to the set fault current
Then the actual measured value is outputted to the signal cable. The
value takes already carried out settings, e.g. default setting into ac-
count.
Connection compartment