Busch-Jaeger KNX USB-interface DIN-railmodule USB-M-1.11 (2CDG510013R0021)

For KNX integrators and building automation engineers, the Busch-Jaeger USB-M-1.11 is a compact DIN rail interface that connects a PC to a KNX TP1 bus. It enables programming, diagnostics, and bus monitoring directly from ETS software.

Key specifications

• KNX medium: TP1 (twisted pair)
• PC interface: USB 2.0, type B port
• Power supply: via KNX bus, 21-30 V DC
• Current consumption: max. 12 mA
• Module width: 2 TE (36 mm)
• Electrical isolation between USB and KNX
• Status LEDs for KNX and USB
• Protection degree: IP20
• Operating temperature: 0 °C to +45 °C
• Storage temperature: -20 °C to +70 °C
• Compatible with ETS3.0d and higher (ETS4, ETS5, ETS6)
• Housing material: thermoplastic

Why choose it

This interface provides reliable galvanic isolation between the PC and the KNX bus, preventing ground loops and protecting both sides. Its compact 2 TE width saves space in distribution boards, and the LED indicators give immediate status feedback.

Ideal use cases

• Commissioning KNX installations with ETS
• Bus diagnostics and troubleshooting
• Long-term monitoring in control cabinets
• Integrating KNX with PC-based visualization or logic

Good to know

The device is powered entirely from the KNX bus, so no external power supply is needed. It mounts on a standard DIN rail and connects to the bus via the red/black KNX terminal.