VEGA VEGABAR 52 4 … 20 mA_HART - climate compensated - Manual (Page 58)

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
Ω
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.