3.2Principle of operation
VEGASON 61 is an ultrasonic sensor for continuous level
measurement.It is suitable for liquids and solids in virtually all
industries,particularly in the water and waste water industry.
The transducer of the ultrasonic sensor transmits short
ultrasonic pulses to the measured product.These pulses are
reflected by product surface and received again by the
rtansducer as echoes.The running time of the ultrasonic
pulases from emission to reception is proportional to the
distance and hence the level.The determined level is
converted into an appropriate output signal and outputted as
measured value.
Power is supplied via the H1Fieldbus.Atwo-wire cable
according to Fieldbus specification serves as carrier of both
power and digital data signals for multiple sensors.This cable
can be operated in two versions:
lvia an H1interface card in the control system and
additional power supply
lvia a linking device with HSE (High speed Ethernet)and
additional voltage supply according to IEC 61158-2
The DD (Device Descriptions)and CFF (capability files)
necessary for planning and configuration of your FF (Founda-
tion Fieldbus)communication network are available in the
download area of the VEGA homepage www.vega.com under
"Services -Downloads -Software -Foundation Fieldbus".The
appropriate certificates are also available there.A CD with the
appropriate files and certificates can be ordered via e-mail
under info@de.vega.com 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.Requirement is a certain height of the
supply voltage.
The data for power supply are stated in chapter "Technical
data"in the "Supplement".
This function is for instruments with StEx,WHG or ship
approval as well as country-specific approvals such as those
according to FM or CSA,available at a later date.
The optional heating requires its own power supply.You can
find further details in the supplementary instructions manual
"Heating for indicating and adjustment module".
Area of application
Functional principle
Power supply and bus com-
munication
DD/CFF
10 VEGASON 61 -Foundation Fieldbus
Product description
28790-EN-070507