Vega VEGABAR 66 Operating Instructions Manual page 68

10 Supplement
Ω
1000
750
500
1
250
12 14 16
Fig. 35: Voltage diagram
1
HART load
2 Voltage limit EEx-ia instrument
3 Voltage limit non-Ex/Exd instrument
4 Operating voltage
Electrical protective measures
Protection class
Transmitter
-
Housing, standard
-
Aluminium and stainless housing (op-
-
tionally available)
External housing
-
Overvoltage category
Protection class
Functional safety (SIL)
The 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.
Functional safety according to IEC 61508-4
Single channel architecture (1oo1D)
-
double channel diversitary redundant
-
architecture (1oo2D)
68
18 20 22
Instruments with gauge pressure measuring ranges cannot detect the am-
18)
bient pressure when submerged, e.g. in water. This can lead to falsification
of the measured value.
Only with instruments with absolute pressure ranges.
19)
24 26 28
IP 68 (25 bar)
IP 66/IP 67
18)
IP 68 (1 bar)
19)
IP 65
III
II
up to SIL2
up to SIL3
VEGABAR 66 • 4 ... 20 mA/HART
2
30 32 34
3
4
V
36