39
5 Connecting to the bus system
VEGAPULS 68 • Foundation Fieldbus
36538-EN-170405
5.7 Wiring plan - version IP 66/IP 68, 1 bar
1
2
Fig. 37: Wire assignment in permanently connected connection cable
1 Brown (+) and blue (-) to power supply or to the processing system
2 Shielding
5.8 Switch-on phase
After VEGAPULS 68 is connected to the bus system, the instrument
carries out a self-test for approx. 30 seconds. The following steps are
carried out:
•
Internal check of the electronics
•
Indication of a status message, e.g. "
F 105 Determine measured
value
" on the display or PC
•
Status byte goes briefly to fault value
Then the actual measured value is outputted to the signal cable. The
value takes into account settings that have already been carried out,
e.g. default setting.
Wire assignment, con-
nection cable