VEGA VEGAFLEX 67 (-200…+400°C) 4 … 20 mA_HART two-wire User Manual
Page 56
1000
750
500
250
14
18
16
20
22
24
26
28
30
32
34
36
Ω
V
4
1
2
3
Fig. 31: 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
Approvals
I
nstruments with approvals can have different technical data depending on the version.
T
hat's why the associated approval documents have to be noted with these instruments. 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".
4)
A
suitable cable is the prerequisite for maintaining the protection rating.
56
VEGAFLEX
67 • 4 … 20
mA/HART - two-wire
10 S
upplement
32311
-EN
-120329