VEGA VEGABAR 67 4 … 20 mA_HART - Manual (Page 62)

62
10 Supplement
VEGABAR 67 • 4 ... 20 mA/HART
36742-EN-130321
1000
750
500
250
12 18 16 14 20 22 24 26 28 30 32 34 36
Ω
V
4
1
2
3
Fig. 34: 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 Transmitter IP 68 (25 bar)
Ʋ Housing, standard IP 66/IP 67 22)
Ʋ Aluminium and stainless housing
(optionally available)
IP 68 (1 bar) 23)
Ʋ External housing IP 65
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
Ʋ double channel diversitary redundant
architecture (1oo2D)
up to SIL3
You can find detailed information in the supplied Safety Manual of the instrument series or under
"www.vega.com", "Downloads", "Approvals".
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".
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.