• Function: Bi-directional KNX USB Interface
• KNX Protocol: cEMI (supports Long Messages up to 220 byte APDU)
• Communication Interface: USB Type B (Galvanic Isolated)
• Input Voltage Range: 21 – 30 V DC (via KNX TP bus) / 5 V DC (via USB bus)
• Current Consumption: < 5mA (KNX) / < 20mA (USB)
• Operating Temperature: −5 °C to +45 °C
• Working Humidity: 20 – 90% RH (non-condensing)
• Pollution Degree: 2 (according to IEC60664-1)
• Protection Rating: IP20 (according to IEC60529)
• Mounting: 35mm DIN Rail (2 units wide)
• Dimensions (W x H x D): 36 mm x 90 mm x 71 mm
• Weight: 70 g
• Safety Standards: EN50428, EN62479, EAC TP TC 004
• KNX Standards: ISO/IEC 14543-3, EN50090, EN13321-1
• EMC Standards: EN50491-5, EN61000-3-3, EAC TP TC 020
• LED Indicators: USB status (Green) and KNX status (Green)
• Manufacturer Warranty: 3 Years

Information about the MEAN WELL KSI-01U

The MEAN WELL KSI-01U serves as a high-performance USB interface designed to provide galvanic isolated bidirectional access to the KNX bus line. This compact 2-unit DIN rail device is essential for modern building automation, allowing for seamless commissioning, addressing, and parameter setting of all bus-connected devices. By utilizing the flexible cEMI protocol and providing native support for long messages up to 220 bytes, the KSI-01U ensures maximum compatibility with ETS, EITT, and various operating systems, including those not supported by standard FALCON drivers like Linux.

One of the standout features of this interface is its bus-powered design, which eliminates the need for any additional external power supplies, significantly simplifying the installation process within electrical cabinets. The device features dual diagnostic LEDs that provide immediate visual feedback on the connection status of both the USB and KNX lines, facilitating rapid troubleshooting. Built to professional standards with a 3-year warranty and a robust 100,000-hour MTBF, it represents a reliable and cost-effective solution for smart home lighting, office automation, and luxury villa projects requiring high-speed system visualization and diagnostic operations.