VEGA VEGABAR 61 4 … 20 mA_HART - Manual (Page 64)

1000
750
500
250
12 18 16 14 20 22 24 26 28 30 32 34 36
Ω
V
4
1
2
3
Fig. 30: Voltage diagram
1
HART load
2 Voltage limit EEx-ia instrument
3 Voltage limit non-Ex/Exd instrument
4 Operating voltage
Electrical protective measures
P rotection class
-
H ousing, standard IP 66/IP 67 20)
-
A luminium and stainless housing (op-
tionally available)
IP 68 (1 bar) 21)
-
T ransmitter in IP 68 version IP 68
-
E xternal housing IP 65
O vervoltage category III
P rotection class II
Functional safety (SIL)
T he functional safety is already activated Ex factory for instruments with SIL qualification. For
instruments Ex factory without SIL qualification, the functional safety must be activated by the user
for applications according to SIL via the indicating and adjustment module or via PACTware.
F unctional safety according to IEC 61508-4
-
S ingle channel architecture (1oo1D) up to SIL2
-
double channel diversitary redundant
architecture (1oo2D) up to SIL3
20) I nstruments with gauge pressure measuring ranges cannot detect the am-
bient pressure when submerged, e.g. in water. This can lead to falsification
of the measured value.
21) O nly with instruments with absolute pressure ranges.
64 VEGABAR 61 • 4 … 20 mA/HART
10 S upplement
27519
-EN
-081209