for ABB i-bus(R) EIB/KNX bus coupler 6120 U-10x, 6110 U-10x, 6114 U and ABB Powernet EIB/KNX network coupling 6920 U-10x and flush mounted switch actuator 6931 U-10x For switching up to two channels of illumination + one channel for HVAC, dependent on bri
