VEGA VEGABAR 53 4 … 20 mA_HART - Manual (Page 57)

57
10 Supplement
VEGABAR 53 • 4 … 20 mA/HART
36722-EN-130321
Ʋ Non-Ex instrument 20 … 36 V DC
Ʋ Ex-ia instrument 20 … 30 V DC
Ʋ Exd 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
14 18 16 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 23)
Ʋ Aluminium and stainless housing
(optionally available)
IP 68 (1 bar) 24)
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
Functional safety (SIL)
Functional safety is already activated on instruments with SIL qualification ex factory. On instru-
ments without SIL qualification ex factory, the functional safety must be activated by the user via
the display and adjustment module or via PACTware for applications according to SIL.
Functional safety according to IEC 61508-4
Ʋ Single channel architecture (1oo1D) up to SIL2
23) 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.
24) Only with instruments with absolute pressure ranges.