ANNEXES
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Manual EC 24 · EN05 · 2015-02
37
Current-loop connection
Terminals:
X22,1 (+)
with cable: white conductor
X22,2 (-)
with cable: brown conductor
U
ext
(min):
12 V
U
ext
(max):
28 V
I
min
: 3.5
mA
I
max
: 23
mA
External load (max.):
R
Lmax
= (U
ext
- 10 V) / I
max
(in
)
e.g.
U
ext
= 16 V
R
Lmax
= (16 V - 10 V) / 23 mA = 260
Current output for
- minimum flow rate:
4 mA
- maximum flow rate:
20 mA
- warning:
3.5 mA
- fault:
23 mA
Accuracy of current output: Better than 1% of the upper-range value
Data for use in areas subject to explosion hazards:
U
i
=
28
V
I
i
=
110
mA
P
i
=
770
mW
C
i
=
2.2
nF
L
i
=
110
μ
H
Supply
Battery
supply
3.6 V lithium cell; inside the device (battery pack)
External 24 V
supply
24 V DC; external; via current-loop connection
plus battery pack
