Grundfos MAGNA3 25-40 N 180 97924336 [23/1656] Analog input
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Grundfos MAGNA3 25-40 N 180 97924336 [23/1656] Analog input

Grundfos MAGNA3 25-40 N 180 97924336 [23/1656] Analog input
English (GB)
23
Externally forced maximum or minimum curve
You can force the pump to operate on the maximum or minimum
curve via the digital input.
Select the function of the digital input on the pump control panel
or with Grundfos GO.
7.4.3 Analog input
See fig. 25, pos. 3.
You can use the analog input for the connection of an external
sensor for measuring temperature or pressure. See fig. 31.
You can use sensor types with 0-10 V or 4-20 mA signal.
You can also use the analog input for an external signal for the
control from a building management system or similar control
system. See fig. 32.
• When the input is used for the heat energy monitor, install a
temperature sensor in the return pipe.
• If the pump is installed in the return pipe of the system, install
the sensor in the flow pipe.
• If the constant-temperature control mode has been enabled
and the pump is installed in the flow pipe of the system, install
the sensor in the return pipe.
• If the pump is installed in the return pipe of the system, you
can use the internal temperature sensor.
You can change the sensor type, 0-10 V or 4-20 mA, on the
control panel or with Grundfos GO.
Fig. 29 Analog input for external sensor, 0-10 V
Fig. 30 Analog input for external sensor, 4-20 mA
In order to optimise the pump performance, you can use external
sensors in the following cases:
Fig. 31 Examples of external sensors
For further details, see section 11.4 External sensors.
Fig. 32 Examples of external signal for the control via BMS or
PLC
Maximum curve
Normal duty
Maximum curve
Minimum curve
Normal duty
Minimum curve
TM05 3221 0612TM05 2948 0612
M
A
Q
H
M
A
Q
H
M
I
Q
H
M
I
Q
H
signal
sensor
Vcc
24V
I
N
signal
sensor
Vcc
24V
I
N
signal
sensor
Vcc
I
24V
I
N
Function or control mode Sensor type
Heat energy monitor Temperature sensor
Constant temperature Temperature sensor
Proportional pressure Pressure sensor
TMTM06 7237 3416
Pos. Sensor type
1
Combined temperature and pressure sensor,
Grundfos type RPI T2.
1/2" connection and 4-20 mA signal.
2
Pressure sensor, Grundfos type RPI.
1/2" connection and 4-20 mA signal.
TM05 2888 0612
Vcc
Signal
1
2
24V
BMS
PLC

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