The Universal Interfaces can install to be system with KNX bus and other device, which are mainly use in building control system. The functions are both simple to operate and intuitive, users can program it according to the requirement to implement the function systematically. This manual provides technical information about the Universal Interfaces in detail for users as well as assembly and programming, and explains how to use the Universal Interfaces by the application examples. Functional Overview The Universal Interfaces achieve the functional applications via conventional push buttons/switches, communicate by technical binary, which are used to control the devices such as the Dimmer Actuator/the Switch Actuator, to control domestic appliance indirectly. At the same time, they also enable the control of LEDs. The extremely compact design enables the device to be inserted in a conventional 80mm or 86mm wiring box. The Universal Interfaces connect to the bus though the KNX connection terminals and have no use for additional supply voltage. It is available to assign the physical address and set the parameters by Engineering design tools ETS with VD4 (higher than edition ETS3). The Universal Interfaces have many functions that can be used in a wide variety of application areas. The following list provides an overview: Switching and dimming function Control of blinds and shutters Sending of values i.e. temperature values Recalling and storing of scenes Trigger an LED for reporting an operation Operation of various loads by multiple push button actions Operation of several loads in a fixed switching sequence Standard counting and differential counting. Each channel of a device can adopt any of the functions described above.