to increase the number of units in a single-circuit system from 7 to a maximum of 30 units, one required per unit, Extension of the cable length from the first to the last unit from 30 m to 500 m, Can only be used with the KaControl -C1 control version!The room temperature cannot be recorded by a room sensor when using CanBus cards., Type 3260301 Suitable for: All units with control configuration KaControl C1