Multifrequency device, controlling and/or monitoring device, associated multifrequency system and piece of home-automation equipment

Multifrequency device designed to be connected by at least first and second conductors to a power supply network, wherein the device comprises:

• at least one radio frequency module comprising at least a first and a second input/output port, wherein the first input/output port is able to transmit and/or receive radio frequency signals at a first frequency, while the second input/output port is able to transmit and/or receive radio frequency signals on a second frequency that is distinct from the first frequency,
• at least first and second tuning circuits designed to block the propagation of radio frequency signals being propagated respectively on the first and second conductors, wherein each tuning circuit comprises a plurality of terminals:
• wherein a terminal of each tuning circuit is respectively connected to the first conductor or to the second conductor,
• wherein a terminal of each tuning circuit is respectively connected to the first input/output port, or to the second input/output port of the radio frequency module,
• decoupling means designed to stop the propagation of electrical supply signals between the first and second conductors and between at least one conductor and an input/output port of the radio frequency module.