Interra 640mA KNX power supply  ITR900-164 :

• Mounting Location: Installation only on a 35 mm DIN rail of a distribution board.
• Device needs at least 4 standard modules width at installation.
• Power supply has an additional 30 VDC short circuit and overload protected voltage output that can be used to power an additional bus line (in combination with a separate choke).
• The voltage output is overload, short circuit and over temperature protected.
• Output without choke can be used as a constant 30 VDC supply and output with choke can be used as a KNX Bus supply.