Grundfos magna3 Installation And Operating Instructions Manual page 18

5.5.2 Digital inputs
See fig. 15, pos. 2.
The digital input can be used for external control of start/stop or
forced max. or min. curve.
If no external on/off switch is connected, the jumper between
terminals Start/Stop (S/S) and frame ( ) should be maintained.
This connection is the factory setting.
M
M
A I
Start/stop
Fig. 18 Digital input
Contact symbol
M
A
M
I
S/S
External start/stop
The pump can be started or stopped via the digital input.
Start/stop
S/S
H
S/S
H
Q
18
S/S
On/off timer
Function
Max. curve
100 % speed
Min. curve
25 % speed
Start/Stop
Frame connection
Normal duty
Note: Factory setting with
jumper between S/S and
Q
Stop
External forced max. or min. curve
The pump can be forced to operate on the max. or min. curve via
the digital input.
M
H
A
M
H
A
M
H
I
M
H
I
Select the function of the digital input on the pump control panel
or with Grundfos GO Remote.
.
Max. curve
Normal duty
Q
Max. curve
Q
Min. curve
Normal duty
Q
Min. curve
Q