VEGA VEGASON 66 Foundation Fieldbus - Manual (Page 9)

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Fig. 1: VEGASON 66 compact with swivelling holder
1 Housing cover with integrated PLICSCOM (optional)
2 Housing with electronics
3 Swivelling holder with flange
4 Transducer
3.2 Principle of operation
VEGASON 66 is an ultrasonic sensor for continuous level
measurement. It is particularly suitable for solids, but also good
for liquids.
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.
Four-wire electronics with separate power supply.
Power for the signal output is supplied via the H1 Fieldbus. A
two-wire cable according to Fieldbus specification serves as
carrier of both power and digital data transmission 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
additional power supply acc. to IEC 61158-2
Area of application
Physical principle
Power supply and bus com-
munication
VEGASON 66 - Foundation Fieldbus 9
Product description
28795
-EN
-060731