The RF USB transceiver is used with the RF KNX transceiver as well
The RF USB transceiver is connected to a PC, the RF KNX transceiver is connected to the KNX bus
They are as communication interface between PC and KNX via RF, used to program and commission the KNX device using the ETS software
Bus voltage 21-30V DC, Via KNX/EIB
Bus current <12mA
Bus consumption: <360mW