The Interra ITR900-0164 is a 640 mA KNX power supply for higher-load KNX lines. It provides stable SELV bus voltage with integrated choke decoupling and is positioned as the high-capacity member of the ITR900 PSU range.

Per Interra product information, this model is used for larger KNX segments and supports robust bus operation with output protection and status indication. It is commonly specified where 160 mA or 320 mA supplies are insufficient.

Key Features — 640 mA KNX PSU

• Nominal output: 640 mA at KNX bus voltage.
• Integrated choke for bus line decoupling.
• Protection features for reliable KNX line operation.
• Wide mains compatibility for international projects.

At a Glance

Specification	Detail
Order code	ITR900-0164
Nominal current	640 mA
Nominal bus voltage	30 V DC (SELV)
Power consumption (typ./max.)	24 W / 55 W
Protection	IP20

Applications and KNX Integration

• High device-count lines: Main PSU for larger KNX segments.
• Scalable power strategy: Pair with 320 mA and 160 mA models based on line load.

Choosing Interra KNX Power Supplies

Choose ITR900-0164 when the KNX line requires maximum current headroom. For lighter lines, use ITR900-0132 or ITR900-0116.