VEGA VEGABAR 52 4 … 20 mA_HART - climate compensated User Manual

Page 58

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58

10 Supplement

VEGABAR 52 • 4 … 20 mA/HART - climate compensated

36718-EN-130321

Voltage supply
Operating voltage

Ʋ Non-Ex instrument

12 … 36 V DC

Ʋ Ex-ia instrument

12 … 30 V DC

Ʋ Exd instrument

18 … 36 V DC

Operating voltage with illuminated display and adjustment module

Ʋ Non-Ex instrument

20 … 36 V DC

Ʋ Ex-ia instrument

20 … 30 V DC

Ʋ Ex d instrument

20 … 36 V DC

Permissible residual ripple

Ʋ < 100 Hz

U

ss

< 1 V

Ʋ 100 Hz … 10 kHz

U

ss

< 10 mV

Load

see diagram

1000

750

500

250

12

18

16

14

20

22

24

26

28

30

32

34

36

V

4

1

2

3

Fig. 29: Voltage diagram
1 HART load

2 Voltage limit Ex-ia instrument

3 Voltage limit non-Ex/Ex-d instrument

4 Operating voltage

Electrical protective measures
Protection rating

Ʋ Housing, standard

IP 66/IP 67

17)

Ʋ Aluminium and stainless housing

(optionally available)

IP 68 (1 bar)

18)

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.

17)

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.

18)

Only with instruments with absolute pressure ranges.

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