Analog Input For External Sensor - Grundfos magna3 Installation And Operating Instructions Manual

5.6 Analog input for external sensor

The analog input can be used for the connection of an external
sensor for measuring temperature or pressure.
The analog input can also be used for an external signal for the
control from a BMS system or similar control system.
The electrical signal for the input can be 0-10 VDC or 4-20 mA.
The selection of electrical signal (0-10 V or 4-20 mA) can be
changed on the control panel or with Grundfos GO Remote.
24V
Vcc
sensor
Fig. 19 Analog input for external sensor or control
In order to optimize the pump performance, external sensors can
advantageously be used in the following cases:
Function/control mode
Heat energy meter
Constant temperature
Differential pressure
Sensor
Sensor
Fig. 20 Wiring, analog input
PIN Description
IN Analog input
24 V 24 V supply to external sensor
Ground for external sensor
N
signal
Sensor type
Temperature sensor
Temperature sensor
Pressure sensor
- +
Load
150 Ω (4-20 mA signal)
78 kΩ (0-10 V signal)
Max. 22 mA
24V IN
Vcc
Signal
Fig. 21 Examples of external sensors
Pos. Sensor type
Differential pressure transmitter,
1 Grundfos type DPI V.2
1/2" connection and 4-20 mA signal.
Relative pressure transmitter,
combined pressure and temperature sensor,
2
Grundfos type RPI/T G 1/2" connection and 4-20 mA
signal.
For further details, visit WebCAPS and reference Magna3 Data
booklet 98439208.
24V
Fig. 22 Example of external signal for the control via BMS or
PLC
1
2
BMS
PLC
19