Wiring Diagrams - Grundfos MAGNA3 25-80 Installation And Operating Instructions Manual

3.9 Wiring diagrams

3.9.1 Connection to power supply, plug-connected versions
RCD/RCCB
Fig. 11 Example of plug-connected motor with main switch, backup fuse and additional protection
3.9.2 Connection to external controllers, plug-connected versions
Analog input Digital input
24V IN M M S/S
A I
Vcc Signal
Sensor
Start/
stop
Fig. 12 Example of connections in the control box of plug-connected versions
Use C and NC for fault signals as this enables serial
connections of more relays and detection of signal
cable defects.
The connection terminals of plug-connected versions (fig. 12)
differ from those of terminal-connected versions (fig. 13), but they
have the same function and connection options.
10
Fuse
Relay 1
NC NO C
Operation
On/off
timer
External switch
Relay 2
NC NO C
Alarm