VEGA VEGABAR 64 Profibus PA - Manual (Page 9)

With the serial number, you can access the delivery data of the
instrument via www.vega.com, "VEGA Tools" and "serial number
search". In addition to the type label outside, you can also find the
serial number on the inside of the instrument.
3.2 Principle of operation
VEGABAR 64 is a pressure transmitter for use in the paper, food
processing and pharmaceutical industries as well as in water/sewage
water plants. Depending on the version, it is used for level, gauge,
absolute pressure or vacuum measurement. Measured products are
gases, vapours and liquids, also those containing abrasive substan-
ces.
The sensor element is the CERTEC
®
measuring cell with flush,
abrasion resistant ceramic diaphragm. The hydrostatic pressure of the
medium or the process pressure causes a capacitance change in the
measuring cell via the diaphragm. This change is converted into an
appropriate output signal and outputted as measured value.
The CERTEC
®
measuring cell is also equipped with a temperature
sensor. The temperature value can be displayed via the indicating and
adjustment module or processed via the signal output.
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 64 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".
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 power supply. You can find
further details in the supplementary instructions manual "Heating for
indicating and adjustment module".
This function is generally not available for approved instruments.
Application area
Functional principle
Power supply and bus
communication
GSD/EDD
VEGABAR 64 • Profibus PA 9
3 Product description
28252
-
EN
-081209