digital
HART
signal
.
A
n analogue
4
…
20
m
A
transmission is not
possible
.
B
ecause this is a digital bus system
,
only one two
-
wire cable
should lead to the two sensors
.
A
distributor can be connected directly
in front of the sensors
.
A
s an alternative
,
the connection to the next
sensor can be continued via the second cable entry in the sensor
housing
.
T
he addressing of the sensors should be carried out before
connection
,
see chapter
"
S
et up
"
.
5
.
3
W
iring plan
17 18 19 20 21 22
9
10
11 12
1
2
3
4
23 24 25 26 27 28
13 14
15 16
5
6
7
8
L1
N
+ -
+ -
+ -
+ -
+ -
1
7
2
3
4
5
6
+ -
12
11
13
8
9
10
F
ig
.
3
:
W
iring plan
VEGAMET
625
with two
-
wire sensors
1
I
nternal operating relay
1
2
I
nternal operating relay
2
3
I
nternal operating relay
3
4
I
nternal current output
1
5
I
nternal current output
2
6
I
nternal current output
3
7
V
oltage supply of
VEGAMET
625
8
M
easurement data input with sensor supply
(
active input
)
9
M
easurement data input
(
passive input
),
not in
E
x ia
10
I
nternal fail safe relay
11
HART
two
-
wire sensor with
M
ultidrop address
1
12
HART
two
-
wire sensor with
M
ultidrop address
2
13
D
istributor
W
iring plan for two
-
wire
sensors
14
VEGAMET
625
•
D
ouble channel
HART
signal conditioning instrument
5
C
onnecting to power supply
28970
-
EN
-
110801
