Device for controlling communication between a module and a transmission bus

Device for controlling communication between a module (10) and a transmission bus (22), comprising a communication control unit (23) disposed between the transmission bus (22) and a connection element (21) intended to connect the module (10) to the transmission bus (22), the said unit (23) comprising a control input (25) and being able to place the connection element (21) in communication with the bus (22) by applying a validation signal to the control input (25), characterized in that the said device comprises means (12) present in the module (10) for generating the said validation signal, the said means comprising a logic component (12) which receives as input at least one input signal (S1, S2, S3, S4) characteristic of a state of the module (10) and which delivers an output (S), the said output (S) generating the said validation signal when the input signal (S1, S2, S3, S4) is representative of an operating state of the module compatible with the placing of the module (10) in communication with the transmission bus (22).