RMG EC 24 - Page 41

ANNEXES
...............................................................................................................................................................................................................
...............................................................................................................................................................................................................
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 μH
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