External Analog 0-10 V Control - Grundfos MAGNA Manual Del Usuario

Functional diagram: Min. curve input
The min. curve input is only active if
• terminals 7 and 8 of the start/stop input are connected and
• terminals 7 and 10 of the max. curve input are not connected.

6. External analog 0-10 V control

The GENI module has an input for an external 0-10 VDC analog signal trans-
mitter. Via this input, the pump can be controlled by an external controller if
the pump has been set to one of the following control modes:
• Constant curve
The external analog signal will control the pump curve within the range
from the min. curve to the constant curve selected according to the char-
acteristic in fig. 2.
• Proportional- or constant-pressure control
The external analog signal will control the setpoint for the pump head be-
tween the setpoint corresponding to the min. curve and the setpoint se-
lected according to the characteristic in fig. 2.
At an input voltage lower than 0.5 V, the pump will operate according to the
min. curve. The setpoint cannot be changed.
The setpoint can only be changed when the input voltage is higher than
0.5 V.
Max. setpoint/constant curve
H m
0
Fig. 2 Example of 0-10 V control
Min. curve
H
H
Setpoint set/constant curve
1 2 3 3 4 5
Q
Q
6 7 8 9 10
Normal duty
Min. curve
U V
9