Universal building actuator has four multi-functional contacts
In buildings automated with KNX software, different actuator types are needed to control switchable and dimmable loads, motors and valves. Universal actuators offer flexibility in planning and implementation and are suitable for switching devices such as electric lights or fans, as well as to control drives for blinds, shutters, awnings or windows.
Building control specialist, Elsner Elektronik has introduced the KNX S2-B6-AP with four multi-functional contacts. Each can be used individually to switch loads. The maximum switching load / switching current is limited to 8A although the contacts can also be used in pairs to control 230V drives.
The application software determines whether individual contacts or a drive channel is configured for each contact pair. The universal actuator then provides the appropriate settings. For the switching function, for example, these might be switching delays or a staircase lighting timer. To provide shade, queries regarding safety around locks, movement restrictions and priorities of commands are set first. Then the sunshade automation, including slat tracking, is adjusted. For windows, there is an automatic ventilation system to keep the temperature and humidity optimal. Movement positions for different scenarios can also be set.
The actuator also has six binary inputs. They are intended, for example, for local pushbuttons for manual operation of a shading system. In the pushbutton configuration, the input and output are directly connected in the actuator. When configured as a bus pushbutton, the input signal is sent to the bus as a communication object. Each input can then be set up as a (toggle) switch, for controlling drives or scenes, for dimming, as an 8-bit, temperature or brightness value transmitter. Alternatively, two of the inputs can be used for zero position sensors.
The actuator is designed to be surface mounted. Control LEDs and pushbuttons are visible under the transparent housing cover. The actuator can be tested during commissioning to ensure it reacts to commands.