Kessel Aqualift Comfort 400V Mono Installation And Operating Instructions Manual page 56

4.5.1.1 Connecting float switch without ATEX
Mono float switch
If float switches are to be used to determine the fill level,
check whether the system is a Mono or a Duo system and
connect accordingly.
Fig. 1: Float switches Mono
Connect the ends of the float switch cables to the terminals
(see "Fig. 1: Float switches Mono").
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Several float switches (Duo)
Connect the ends of the float switch cables to the terminals
(see "Fig. 2: Float switches Duo").
Installation and operating instructions
Fig. 2: Float switches Duo
010-532_02_SON