4-channel KNX relay module for switching electrical loads in networks with a rated voltage of up to 230V. Manual control capability. Operating modes: normally open or normally closed contact; individual delay function per channel; staircase lighting function with or without manual override; additional logic or priority control; scenes; status object per channel; central function. Convenient DIN-rail mounting. Power supply: DC 21–30V from the data bus. Maximum switching current: 16A per channel.