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20
5.12 Analog
The pump is dosing according to an external analog
signal. The dosed quantity is proportional to the input
value in mA.
4-20 (default): 4 mA = 0 %.
20 mA = 100 %.
20-4: 4 mA = 100 %.
20 mA = 0 %.
0-20: 0 mA = 0 %.
20 mA = 100 %.
20-0: 0 mA = 100 %.
20 mA = 0 %.
See fig. 9.
The capacity limitation will influence the capacity.
100 % corresponds to the maximum capacity of the
pump or the set maximum capacity, see section 5.16.
The analog input requires a signal which is isolated
from frame. Min. resistance to frame: 50 k
Fig. 9
Fig. 10
If 4-20 mA or 20-4 mA is selected and the signal falls
below 2 mA, the pump will indicate a fault. This
situation occurs if the connection is interrupted, for
instance if the wire is damaged.
Change the analog mode as illustrated in fig. 11:
Fig. 11
TM02 4498 1102
0 4 8 12 16 20
0
20
40
60
80
100
Value according to
analog signal
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