Vega VEGABAR 52 4 … 20 mA_HART - climate compensated Bedienungsanleitung PDF herunterladen (Seite 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

< 1 V

Ʋ 100Hz…10kHz U

< 10 mV

Load see diagram

1000

750

500

250

12 18

1614 20 22 24 26 28 30 32 34 36

Ω

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dierent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falsicationofthemeasuredvalue.

18)

Only with instruments with absolute pressure ranges.

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