Grundfos MAGNA3 Installatie- En Bedieningsinstructies pagina 17

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4.3 Connection diagram

Example of typical connection, 1 x 230 V ± 10 %, 50/60 Hz

4.4 Connection to external controllers

Fig. 10 Connection diagram

Wires connected to supply terminals, outputs

NC, NO, C and start/stop input must be separated

from each other and from the supply by

reinforced insulation.

Concerning demands on signal wires and signal transmitters,

see section 18. Technical data.

Use screened cables for external on/off switch, digital input,

sensor and setpoint signals.

All cables used must be heat-resistant up to

All cables used must be installed in accordance

with EN 60204-1 and EN 50174-2:2000.

4.5 Input/output communication

Relay outputs

Alarm, ready and operating indication via signal relay.

Digital input

– Start/Stop (S/S)

– Min. curve (MI)

– Max. curve (MA).

Analog input

0-10 V or 4-20 mA control signal.

To be used for external control of the pump or as sensor input

for the control of the external setpoint.

The 24 V supply from pump to sensor is optional and is

normally used when an external supply is not available.

External switch

(min. 10 A, time lag)

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