Electrical Connection For External Sensor; Priority Of Settings - Grundfos magna3 Installation And Operating Instructions Manual

5.7 Electrical connection for external sensor

Fig. 23 Example electrical connections for external sensor
PIN 1
Wire color Brown Grey
Output
+ not used
4 to 20 mA
Output Pressure
+
2 x 0 to 10 V signal
* Common ground for both pressure and temperature signal.
* Power supply (screened cable): SELV or PELV.
20
2
1
4
3
2 3 4
Blue Black
- not used
Temperature
-*
signal

5.8 Priority of settings

The external forced-control signals will influence the settings
available on the pump control panel or with Grundfos GO
Remote. However, the pump can always be set to max. curve
duty or to stop on the pump control panel or with Grundfos GO
Remote.
If two or more functions are enabled at the same time, the pump
will operate according to the setting with the highest priority.
The priority of the settings is as shown in the table below.
Example: If the pump has been forced to stop via an external
signal, the pump control panel or Grundfos GO Remote can only
set the pump to max. curve.
Possible settings
Pump control
Priority
panel or
Grundfos GO
Remote
1 Stop
2 Max. curve
3
4
5
6
7
8
9 Min. curve
10
11 Start
As illustrated in the table, the pump does not react to external
signals (max. curve and min. curve) when it is controlled via bus.
For further details, please contact Grundfos.
External
Bus signal
signals
Stop
Stop
Max. curve
Min. curve
Start
Max. curve
Min. curve