VEGA VEGAFLEX 65 4 … 20 mA_HART two-wire User Manual
Page 48
P
ermissible residual ripple
-
<
100 H
z
U
ss
<
1 V
-
100 H
z … 10 kHz
U
ss
<
10
mV
L
oad
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. 24: Voltage diagram
1
HART load
2
Voltage limit EEx-ia instrument
3
Voltage limit non-Ex/Ex-d instrument
4
Operating voltage
Electrical protective measures
P
rotection, depending on housing version
-
P
lastic housing
IP
66/IP 67
-
A
luminium housing, stainless steel
housing - investment casting, stainless
steel housing - electro-polished
IP
66/IP 68 (0.2
bar)
4)
-
A
luminium and stainless housing, in-
vestment casting (optionally available)
IP
66/IP 68 (1
bar)
O
vervoltage category
III
P
rotection class
II
Functional safety (SIL)
F
unctional safety is already activated on instruments with SIL qualification ex factory. On
instruments without SIL qualification ex factory, the functional safety must be activated by the user
via the indicating and adjustment module or via PACTware for applications according to SIL.
F
unctional safety according to IEC 61508-4
-
S
ingle channel architecture (1oo1D)
up to SIL2
4)
A
suitable cable is the prerequisite for maintaining the protection rating.
48
VEGAFLEX
65 • 4 … 20
mA/HART - two-wire
10 S
upplement
31845
-EN
-120329