Speck pumpen BADU Variostar Fiche Technique page 15

The pump has a permanent magnetic motor and is electronically
protected against overload.
Connecting external switch contacts
The pump has an 8-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.
Low
n1
09|2019
Priority
n2 n3
WG27.50.094-2-P
High
Stop
EN 15