Grundfos MAGNA3 D Installation And Operating Instructions Manual page 34

Connections in the control box, terminal-connected versions
Analog input
24V IN
Vcc
Signal
Sensor
Digital input
M M S/S
A I
Start/stop
On/off
timer
Fig. 45 Example of connections in the control box of terminal-connected versions
Note: Use C and NC for fault signals as this enables serial connections of more relays and detection of signal cable defects.
For further information on digital and analog inputs, see section 8.11.3 Digital inputs, and 8.11.4 Analog input.
For information on relay outputs, see 8.11.2 Relay outputs.
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Relay 1 Relay 2
NC NO C NC NO C
Operation Alarm
Power
L
GFCI
L N