For KNX bus coupler C4-KNX-BC. With labeling field. Support of KNX functions through innovative LED colour concept (yellow=lighting, blue=blind, orange=RTC, magenta=scene and white=neutral/no function assigned) or standard illumination red/green. Push switch function: switching / dimming / blind / sending values / scenes etc. Transparent labeling sheet with standard symbols included in delivery. Includes 10 logic channels (light scene actuator, sequence actuator, logic gates, etc.).