VEGA VEGABAR 81 Profibus PA - Operating Instructions - Manual (Page 28)

28
5 Connecting to power supply
VEGABAR 81 • Profibus PA
45020-EN-131107
5
0 0
5
1
6
2
7 3 8
4
9 0
5
1
6
2
7 3 8
4
9 1
0
1
6 7 8
Bus
2
3
4
5 1 2 +
( ) (-)
1
Fig. 28: Electronics and connection compartment, single chamber housing
1 Voltage supply, signal output
2 For display and adjustment module or interface adapter
3 Selection switch for bus address
4 For external display and adjustment unit
5 Ground terminal for connection of the cable screen
5.9 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.
Electronics and connec-
tion compartment