The Enertex® KNX DUAL PowerSupply 1280 (6 SU) provides with a single device two separately operating KNX power supplies with 1280 mA and 320 mA and a third 30V auxiliary power supply with 320 mA (100% overload capable). The device allows a compact realization of a powerful inner line in combination with another physically and topologically separated second outer line. The additional unchoked 30 V auxiliary voltage output provides a DC supply for further devices or, using a further external KNX choke, a third KNX line (320 mA).

Each of the three outputs has its own current limiter, which protects against short circuit and overload. The limitation is selective, so that if one output or KNX line is short-circuited, the other two outputs or lines can continue to operate normally.

The device also has measuring and diagnostic functions. Measured values and device parameters are shown on the OLED display of the device, e.g. current, voltage, peak current with time stamp for both KNX and auxiliary voltage outputs. Commissioning, maintenance and analysis of the KNX installation is thus significantly simplified.

Further measurement and diagnostic data is made available via group objects at the bus, including the internal housing temperature, telegram rate, energy meter and the latest bus voltage failure, the latest bus voltage recovery and the latest remote reset with time stamp. Communication via group addresses is carried out with standard KNX protocol unencrypted or encrypted with KNX Data Secure. With the help of two KNX group addresses, a separate bus reset can be carried out for the main line and secondary line.

In addition, the KNX DUAL PowerSupply 1280 has an integrated real-time clock with a power reserve of approx. 36 hours and can be parameterised as a KNX clock. A comprehensive time switch application with 64 switching times for max. 64 group addresses, including extensive logic functions, holiday calendar and astro function is integrated. The time switches can directly address KNX group addresses for switching, dimming, blinds, scene, colour RGB, colour HSV and heating controller’s operating mode.