VEGA VEGAPULS 68 (≥ 2.0.0 - ≤ 3.8) Profibus PA - Manual (Page 10)

l The version with horn antenna is particularly suitable for
measurement of virtually all bulk solids in small silos and vessels.
l The version with parabolic antenna is particularly suitable for large
silos and vessels with up to 70 m (76 yd) measuring distance and
for measurement of solids with low dielectric constant.
VEGAPULS 68 is also suitable for applications in liquids.
The antenna of the radar sensor emits short radar pulses with a
duration of approx. 1 ns. These pulses are reflected by the product
and received by the antenna as echoes. The running time of the radar
pulses from emission to reception is proportional to the distance and
hence to the level. The determined level is converted into an
appropriate output signal and outputted as measured value.
Power supply via the Profibus DP/PA segment coupler or VEGALOG
571 EP cards. A two-wire cable according to Profibus specification
serves as carrier of both power and digital data transmission for
multiple sensors. The instrument profile of VEGAPULS 68 corre-
sponds to profile specification version 3.0.
The GSD (instrument master files) and bitmap files necessary for
planning your Profibus-DP-(PA) communication network are available
from the download section on the VEGA homepage www.vega.com
under "Services - Downloads - Software - Profibus". There you can
also find the appropriate certificates. In a PDM environment, an EDD
(Electronic Device Description) is also required to enable the full range
of sensor functions (also available as a download).A CD with the
appropriate files can be ordered via e-mail under [email protected] or
by phone from one of the VEGA agencies under the order number
"
DRIVER.S".
The backlight of the indicating and adjustment module is powered by
the sensor. Prerequisite is a certain level of operating voltage.
The data for power supply are specified in chapter "Technical data".
The optional heating requires its own operating voltage. You can find
detailed information in the supplementary instructions manual "Heating
for indicating and adjustment module". This function is generally not
available for approved instruments.
3.3 Operation
VEGAPULS 68 can be adjusted with different adjustment media:
l with indicating and adjustment module
l with the suitable VEGA DTM in conjunction with an adjustment
software according to the FDT/DTM standard, e.g. PACTware and
PC
l with the adjustment program PDM
The entered parameters are generally saved in VEGAPULS 68,
optionally also in the indicating and adjustment module or in
PACTware.
Functional principle
Power supply and bus
communication
GSD/EDD
10 VEGAPULS 68 • Profibus PA
3 Product description
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-EN
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