Control system for a robotized transmission, for a motor vehicle, comprising: a power train control unit suitable for generating a setpoint signal for driving a transmission actuator; said power train control unit being able to communicate via a multiplexing interface; a transmission actuator (1, 1a, 1b, 2, 3, 78) suitable for ensuring the actuation of a clutch (63, 75), the selection of the ratios of a gearbox or the changing of the ratios of a gearbox, said transmission actuator comprising: ∘ an electromechanical actuation device; ∘ a power electronic module (28, 29, 30) for powering the electromechanical actuation device; ∘ a sensor (39, 41) suitable for delivering a signal representative of a physical parameter of the electromechanical actuation device; ∘ a module (31, 32, 33) for driving the actuator suitable for controlling the power electronic module (28, 29, 30) in order to drive the electromechanical actuation device as a function of the setpoint signal generated by the power train control unit and of the signal representative of a physical parameter of the electromechanical actuation device; and ∘ a multiplexing interface; and a multiplexing bus connecting the multiplexing interfaces of the actuator and of the power train control unit, the transmission actuator comprising a connector ensuring the connection of the transmission actuator (1, 1a, 1b, 2, 3, 78) to a multiplexing bus and to an electrical power supply network connected to the battery of the vehicle, the connector ensuring the connection of the transmission actuator (1, 1a, 1b, 2, 3, 78) to one or more external sensors chosen from a sensor ( 7,73) for measuring the speed of rotation of an input shaft of the gearbox, a sensor for measuring the temperature of the oil in the gearbox and a speed selector position sensor, the power train control unit being a central unit comprising an engine control unit suitable for implementing engine control strategies and a transmission control unit suitable for generating the setpoint signal for driving a transmission actuator. a power train control unit suitable for generating a setpoint signal for driving a transmission actuator; said power train control unit being able to communicate via a multiplexing interface; a transmission actuator (1, 1a, 1b, 2, 3, 78) suitable for ensuring the actuation of a clutch (63, 75), the selection of the ratios of a gearbox or the changing of the ratios of a gearbox, said transmission actuator comprising: ∘ an electromechanical actuation device; ∘ a power electronic module (28, 29, 30) for powering the electromechanical actuation device; ∘ a sensor (39, 41) suitable for delivering a signal representative of a physical parameter of the electromechanical actuation device; ∘ a module (31, 32, 33) for driving the actuator suitable for controlling the power electronic module (28, 29, 30) in order to drive the electromechanical actuation device as a function of the setpoint signal generated by the power train control unit and of the signal representative of a physical parameter of the electromechanical actuation device; and ∘ a multiplexing interface; and ∘ an electromechanical actuation device; ∘ a power electronic module (28, 29, 30) for powering the electromechanical actuation device; ∘ a sensor (39, 41) suitable for delivering a signal representative of a physical parameter of the electromechanical actuation device; ∘ a module (31, 32, 33) for driving the actuator suitable for controlling the power electronic module (28, 29, 30) in order to drive the electromechanical actuation device as a function of the setpoint signal generated by the power train control unit and of the signal representative of a physical parameter of the electromechanical actuation device; and ∘ a multiplexing interface; and a multiplexing bus connecting the multiplexing interfaces of the actuator and of the power train control unit, the transmission actuator comprising a connector ensuring the connection of the transmission actuator (1, 1a, 1b, 2, 3, 78) to a multiplexing bus and to an electrical power supply network connected to the battery of the vehicle, the connector ensuring the connection of the transmission actuator (1, 1a, 1b, 2, 3, 78) to one or more external sensors chosen from a sensor ( 7,73) for measuring the speed of rotation of an input shaft of the gearbox, a sensor for measuring the temperature of the oil in the gearbox and a speed selector position sensor, the power train control unit being a central unit comprising an engine control unit suitable for implementing engine control strategies and a transmission control unit suitable for generating the setpoint signal for driving a transmission actuator.