VEGA VEGABAR 53 Foundation Fieldbus - Manual (Page 53)

53
10 Supplement
VEGABAR 53 • Foundation Fieldbus
36724-EN-130321
Ʋ Non-Ex instrument 12 … 32 V DC
Ʋ Ex-ia instrument 12 … 24 V DC
Ex d instrument 12 … 32 V DC
Power supply by/max. number of sensors
Ʋ H1 power supply max. 32 (max. 10 with Ex)
Electrical protective measures
Protection rating
Ʋ Housing, standard IP 66/IP 67 22)
Ʋ Aluminium and stainless housing
(optionally available)
IP 68 (1 bar) 23)
Ʋ Process component in IP 68 version IP 68 (25 bar)
Ʋ External housing IP 65, IP 66/IP 68 (0.2 bar)
Overvoltage category III
Protection class II
Approvals
Instruments with approvals can have different technical data 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 "serial number 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.
22) Instruments with gauge pressure measuring ranges cannot detect the ambient pressure when submerged, e.g.
in water. This can lead to falsification of the measured value.
23) Only with instruments with absolute pressure ranges.