VEGA VEGABAR 64 Foundation Fieldbus - 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 is supplied via the H1 Fieldbus. A two-wire cable according to
Fieldbus specification serves as carrier of both power and digital data
for multiple sensors. This cable can be operated in two versions:
l via an H1 interface card in the control system and additional power
supply
l
via a Linking device
with HSE (High speed
Ethernet) and addition-
al power supply ac-
cording to IEC 61158-2
The DD (Device Descriptions) and CFF (capability files) necessary for
planning and configuration of your FF (Foundation Fieldbus) commu-
nication network are available in the download area of the VEGA
homepage www.vega.com under "Services - Downloads - Software -
Application area
Functional principle
Power supply and bus
communication
DD/CFF
VEGABAR 64 • Foundation Fieldbus 9
3 Product description
28259
-
EN
-081209