Brochure

Operating conditions
MAGNA3
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Differential-pressure and
temperature sensor
The MAGNA3 incorporates a differential-pressure and
temperature sensor. The sensor is located in the pump
housing in a channel between the suction and
discharge ports. The sensors of twin-head pumps are
connected to the same channel and the pumps
therefore register the same differential pressure and
temperature.
Via a cable, the sensor sends an electrical signal for
the differential pressure across the pump and for the
liquid temperature to the controller in the control box.
In case of missing sensor signal, the pump will run at
maximum speed. When the fault has been corrected,
the pump will continue operating according to the
parameters set.
The differential-pressure and temperature sensor
offers substantial benefits:
• direct feedback on the pump display
• complete pump control
• measurement of the pump workload for precise and
optimum control resulting in higher energy
efficiency.
Electrical data
Sound pressure level
Pump type MAGNA3 (D)
Enclosure class Type 2
Insulation class F.
Supply voltage 1 x 115/208-230 V ± 10 %, 50/60 Hz, PE.
Two digital inputs
External potential-free contact.
Contact load: 5 V, 10 mA.
Screened cable.
Loop resistance: Maximum 130 Ω.
Analog input
4-20 mA (load: 150 Ω).
0-10 VDC (load: > 10 kΩ).
Two relay outputs
Internal potential-free changeover contact.
Maximum load: 250 V, 2 A, AC1.
Minimum load: 5 VDC, 20 mA.
Screened cable, depending on signal level.
Bus input
Grundfos Communication Interface Modules (add-on CIM modules) for
• GENIbus
• LonWorks
• Profibus DP
• Modbus RTU
• BACnet MS/TP
• Grundfos Remote Management.
Earth leakage current
I
leakage
< 3.5 mA.
The leakage currents are measured in accordance with EN 60335-1.
EMC EN 55014-1:2006, EN 55014-2:1998, EN 61800-3-3:2008 and EN 61000-3-2:2006.
cos φ
The MAGNA3 has a built-in active PFC (Power Factor Control) which gives a cos φ from 0.98 to 0.99,
i.e. very close to 1.
Consumption then the pump is stopped
1 to 10 W, depending on activity, i.e. reading the display, use of Grundfos GO Remote, interaction with
modules, etc.
4 W, when pump is stopped and no activity.
Pump type MAGNA3
Sound pressure level ≤ 43 dB(A)