Abstract: The device serves to interconnect first and second sections of a data bus in order to provide a transparent bi-directional data transmission along the bus comprised of the two sections, irrespective of the protocol used. Basically, the device includes a first transmitter-receiver module at which terminates a first bus section, and a second transmitter-receiver module at which terminates a second bus section. Both modules are disposed face-to-face without contact and are electromagnetically coupled. Each receiver module has a circuit for supplying a transmitting coil with a signal modulated by the data to be transmitted and coming from the bus section to which the module is connected, and a detector circuit for receiving a modulated signal from the same coil to produce the data to be transmitted to the bus section to which the module is connected.