VEGA VEGABAR 65 Profibus PA - Manual (Page 8)

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1
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Fig. 1: Example of a VEGABAR 65 with process fitting G1½ A and plastic
housing
1 Housing cover with integrated PLICSCOM (optional)
2 Housing with electronics
3 Process fitting with measuring cell
3 .2 Principle of operation
VEGABAR 65 is a pressure transmitter for use in the chemical, food
processing and pharmaceutical industries. Depending on the version,
it is used for level, gauge, absolute pressure or vacuum measurement.
Measured products are gases, vapours and liquids, also those with
higher temperatures.
The METEC
®
measuring cell is the measuring unit. It consists of the
ceramic-capacitive CERTEC
®
measuring cell and a special, temper-
ature-compensating isolating system.
The hydrostatic pressure of the product or the process pressure
causes a capacitance change in the measuring cell via the metal
process diaphragm and the isolating liquid. This change is converted
into a corresponding output signal.
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 VEGABAR 65 corresponds
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 - Pro
fibus". 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".
Application area
Functional principle
Power supply and bus
communication
GSD/EDD
8 VEGABAR 65 • Profibus PA
3 Product description
28253
-EN
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