The KNX power supply unit supplies the power needed by the KNX bus line devices,
generating a safety extra low voltage (SELV) of 30 Vdc.
The maximum output current is 320 mA for the GW90709 power supply unit and
640 mA for the GW90710 power supply unit: the choice of supply unit depends on
the maximum current consumption of the KNX devices connected to the line. Each
bus line requires at least one power supply unit. The power supply unit integrates
an internal choke to isolate data traffic from the power supply. A special red/black
terminal is used to connect it to the bus. The power supply unit is protected against
short-circuits and has a maximum output current limit. The green LED (Operating
status) indicates when the power supply unit is ready. The red over-current LED
indicates that there is an excessive current consumption (l>lmax).
The RESET button resets all the devices connected to the bus.
When the button is pressed briefly, using a sharp tool, the output voltage will be
interrupted for 20 seconds.