![CDATA[KNX L1 and L2 ind/gr/bc sec form the interface between a KNX installation and a digital DALI (Digital Addressable Lighting Interface) lighting system. Depending on the device variant, the gateway enables switching and dimming of DALI operating devices in either one DALI system (L1, 1×64 operating devices) or in two separate DALI systems (L2, 2×64 operating devices).]]>