BADU Alpha Eco Soft Fiche Technique page 14

The pump has a permanent magnetic motor and is electronically
protected against overload.
Connecting external switch contacts
The pump has a 5-wire cable with open ends for external control.
Assignment of the cables to the individual speeds is as follows:
The cables must be connected potential free. Only switch the
contacts individually (observe priority of the contacts). Otherwise
the desired speed is not activated.
NOTICE
The motor performance level is switched on using the manual button or
external switch contacts. The switch contacts and the assigned speed are
activated.
If the pump starts from a standstill, it starts up in priming mode and
subsequently with the selected performance level.
During running operation the pump is started up directly at the
performance level, without priming time.
If external control is not necessary, the cable ends need to be insulated.
NOTICE
For easy interaction with peripheral devices such as electric heat
exchangers or dosing systems, installing a flow monitor with the
appropriate evaluation unit is recommended. This can also output a fault
message.
EN 14 09|2020