Electrical
connections
CI/FEX300/FEX500-EN
FEX300, FEX500
EN - 43
5.6.3 Connection examples for the peripherals
Current output
Max. permissible load (R
B
) as a function of the source
voltage (U
2
)
A = "Active" configuration:
4 ... 20 mA, HART
Load: 0 =R = 650
Ω
(300
Ω
for
Ex Zone 1 / Div. 1)
Min. load with HART: 250
Ω
G00
4
75
+
31
-
32
I
E
+
31
-
32
I
E
V
A
B
R
B
R
B
U
1
U
2
B = "Passive" configuration:
4 ... 20 mA, HART
Load: 0 =R = 650
Ω
Min. load with HART: 250
Ω
Supply voltage for the current
output, terminals 31 / 32:
U1: Min. 11 V, max. 30 V
I = internal, E = external
G00592
200
250
300
350
4
00
4
50
500
550
600
650
700
17 18 19 20 21 22 23 2
4
25 26 27 28 29 30
U [V]
2
R[
]
B
Ω
Fig. 40
Digital output DO1
Max. permissible load (R
B
) as a function of the source
voltage (U
2
)
A = "Active" configuration
19 ... 21
V+
-
I
E
51
52
R
B
*
I
m
a
x
= 220
m
A
≤
30
V+
-
R
B
*
U
CE
I
CE
I
E
51
52
G00476-03
A
B
U
2
B = "Passive" configuration
G00593
50
150
250
350
4
50
550
650
750
850
950
1050
1150
1250
1350
1
4
50
1550
16 17 18 19 20 21 22 23 2
4
25 26 27 28 29 30
U
[V]
2
R[
]
B
Ω
I = internal, E = external
= Permissible range
Fig. 41
Digital output DO2, e.g., for system monitoring, max. / min. alarm, empty meter tube or forward / reverse signal, or counting pulses
(function can be configured using software)
G00792
R
B
*
I
m
a
x
=
220
m
A
R
B
*
U
CE
I
CE
+
U
+
U
I
E
4
1
4
2
I = internal, E = external
Fig. 42
