Information On Foundation Fieldbus - Vega VEGABAR 66 Operating Instructions Manual

10 Supplement
Ʋ Ex d instrument
Operating voltage with illuminated display and adjustment module
Ʋ Non-Ex instrument
Ʋ Ex-ia instrument
Ʋ Ex d instrument
Power supply by/max. number of sensors
Ʋ Fieldbus
Electrical protective measures
Protection rating
Ʋ Transmitter
Ʋ Housing, standard
Ʋ Aluminium and stainless housing
(optionally available)
Ʋ External housing
Overvoltage category
Protection class
Approvals
Instruments with approvals can have different technical specifications depending on the version.
For that reason the associated approval documents of these instruments have to be carefully
noted. They are part of the delivery or can be downloaded under www.vega.com via "VEGA Tools"
and "Instrument search" as well as via "Downloads" and "Approvals".

10.2 Information on Foundation Fieldbus

Block diagram, measured value processing
The following illustration shows the Transducer Block and Function block in simplified form.
Instruments with gauge pressure measuring ranges cannot detect the ambient pressure when submerged, e.g.
20)
in water. This can lead to falsification of the measured value.
Only with instruments with absolute pressure ranges.
21)
60
16 ... 32 V DC
12 ... 32 V DC
12 ... 24 V DC
20 ... 32 V DC
max. 32 (max. 10 with Ex)
IP 68 (25 bar)
IP 66/IP 67
20)
IP 68 (1 bar)
21)
IP 65
III
II
VEGABAR 66 • Foundation Fieldbus