KNX Redundant Bus Power Supply with diagnostic function, 6 SU MDRC, 640 mA. Version with nominal current 640 mA. Redundant Bus Power supply to increase operational safety. KNX Bus Power Supply with integrated choke. Two integrated Power supplies for redundancy. Power supply 2 x 230 V AC (separate RCD circuits possible). Nominal current 640 mA, continuous current 960 mA, peak current 1200 mA. In the event of a failure, mains power or an internal power part, the KNX power supply is maintained over the second power supply unit. Failure message via telegram. Short circuit proof. Overload protected. Additional unchoked output U2. Integrated Bus coupler with diagnostic functions:. Bus power, Bus current, Bus overload. Mains power failure/recovery. All events are stored in the ring storage with time a stamp. Readout of the ring memory via a 14 Byte Telegram. Safety function to detect a failed device in the KNX line. 3 year warranty.