VEGA VEGAFLEX 66 (-110…+400°C) 4 … 20 mA_HART User Manual
Page 56
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. 30: Voltage diagram
1
HART load
2
Voltage limit EEx-ia instrument
3
Voltage limit non-Ex/Exd instrument
4
Supply 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, stain-
less steel housing - electro-polished
IP
66/IP 68 (0.2
bar)
4)
-
A
luminium and stainless housing,
investment casting (optionally avail-
able)
IP
66/IP 68 (1
bar)
O
vervoltage category
III
P
rotection class
II
Functional safety (SIL)
F
unctional safety according to IEC 61508/IEC 61511
-
S
ingle channel architecture (1oo1D)
up to SIL2
-
double channel diversitary redun-
dant architecture (1oo2D)
up to SIL3
4)
A
suitable cable is the prerequisite for maintaining the protection class.
56
VEGAFLEX
66 • 4 … 20
mA/HART
10 S
upplement
32762
-EN
-080716