External Start/Stop; Signal Relay; Fault Indication - Grundfos Magna Installation And Operating Instructions Manual

4. External start/stop

The relay module incorporates a digital input for an external contact.
The pump can be started and stopped via this input.
When started, the pump will operate with the setpoint set on the control
panel or with the R100.
Note: If the external contact is used, the connection between terminals
7 and 8 must be replaced by the external connection.
Functional diagram: Start/stop input
Contact position Function
Stop of pump
Start of pump

5. Signal relay

The function of the signal relay can be set with the R100.
Possible functions:
• Fault
• Ready
• Operation.

5.1 Fault indication

The signal relay is activated in case of
• Pump blocked
• Internal fault
• Undervoltage.
See section 5.4 Functional diagram.
When the fault disappears, the signal relay is deactivated. The fault cause is
stored in the pump alarm log. The latest five faults can be called up with the
R100.
Note: In case of a fault, the red indicator light on the control panel is on.
See installation and operating instructions for GRUNDFOS MAGNA 25-60,
25-100, 32-60, 32-100, 40-100(D), 50-100.
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