KNX dimming actuator 4-way comfort 4 x 225 W VAREG Features: Dimming actuator with integrated bus connection. Switching and dimming of incandescent lamps, HV halogen lamps, dimmable HV LED lamps, dimmable compact fluorescent lamps, dimmable inductive transformers with LV halogen or LV LED lamps, dimmable electronic transformers with LV halogen or LV LED lamps. Automatic or manual selection of the dimming principle that suits the load. Idle, short-circuit and overtemperature proof. Manual operation of the outputs independent of the bus. Temporary status display can be activated, linking via communication object across several actuators possible. Parallel connection of several outputs for dimming larger lamp loads or power expansion via power boosters. To simplify configuration, all existing dimming channels can be assigned to the same parameters in the ETS and thus parameterized identically. Up to 6 central functions for the joint control of all dimming channels with switching, dimming and value objects. Up to 8 independent logic functions for the implementation of simple or complex logical operations. Actively sending feedback or status messages can be globally delayed after bus voltage returns or after an ETS programming process. Dimming outputs: Independent switching and dimming of the dimming outputs. Specification of the load type and determination of the dimming principle possible: Universal (with automatic calibration process), electronic transformer (capacitive phase cut-off), conventional transformer (inductive phase cut-off), LED (phase cut-off) or LED (phase cut-off). Dimming characteristic per channel can be configured to adapt to the respective connected load in the time range and value range. Setting of the dimmable range possible (switch-on brightness, basic brightness, alternatively: lower dimming limit and upper dimming limit). Behavior when receiving an absolute brightness value can be set (dimming, jumping on, fading). Behavior when dimming up relative to the off state can be set (switch on channel, no reaction). Central control function via up to 6 switching objects, 6 dimming objects and 6 value objects and collective feedback. Switching feedback: Active (when changed or sent cyclically to the bus) or passive (object can be read out) feedback function. Brightness value feedback: Active (when changed or sent cyclically to the bus) or passive (object can be read out) feedback function. The type of update can be set for active feedback objects (when the input object changes or when the feedback value changes). This makes it possible to adapt to visualizations individually. Feedback for short circuit, overload, mains voltage failure and load type (KNX compliant and extended). Reaction when bus voltage failure returns and after an ETS programming process can be set for each output. Logical linking function individually for each output. Locking function can be parameterized for each channel.Alternatively, forced position function separately for each output. Time functions (switch-on, switch-off delay). Staircase light function with advance warning function through time-controlled reduction of the lighting or activation of permanent lighting. Staircase function with time extension or variable staircase time allocation via communication object. Soft-ON function and soft-OFF function adjustable. Automatic switch-off at brightness value < X% adjustable (with individual delay time). Inclusion in light scenes possible: Up to 64 internal scenes can be parameterized for each output. Delay time when scene is called up can be configured. Dimming behavior when calling up a new scene can be adjusted (jump on, dim, fading). Visual feedback when saving a scene. Extended scene call-up. Operating hours counter can be activated individually for each output. Operating hours counter as up counter (with optional limit value) or down counter (with optional start value). Logic functions: The device has 8 internal logic functions.