KNX POWER SUPPLY UNIT 320 mA

KNX power supply units generate and monitor the KNX system voltage (SELV). They guarantee the supply of the KNX subscribers with electrical energy and the data communication via the bus line. One bus line can be connected to the KNX power supply units at the "Bus" connection. A regulator is integrated in each power supply unit, so that there is no need for the use of external KNX regulators at the bus connection. In addition, the KNX power supply units possess an unregulated direct current output "30 V DC" (SELV). This connection is used, for example, to allow the supply of a further line (e.g. main line) via a KNX regulator to be installed separately. Alternatively, the direct current output can be used to supply further function devices (e.g. auxiliary voltage for binary inputs). The electrical load can be divided up to the outputs "BUS" and "DC 30 V" as required. However, the total rated current dependent on the device variant (320 mA, 640 mA) may not be exceeded. The outputs possess shared overload and short-circuit protection and are also protected against running to empty. The connection of the bus line and the additional consumers takes place using KNX device connection terminals (no data rail required). The KNX power supply units possess a potential-free relay output as a signalling contact for operating or diagnostic messages. This contact is closed in normal operation and opened when device operation is faulty (overload, overvoltage, voltage failure). Every power supply unit possesses a reset push-button, which, when actuated, shorts the bus line for a defined time or permanently and thus performs a reset of the connected bus subscribers. In addition, it is possible to acknowledge a fault message using the reset pushbutton. An LED display on the front of the device can be used to read off the operating state of the power supply units.