Braking system for a motorized car of a railway vehicle, comprising: - a device for managing the grip of wheels of the car and of the rails, during braking, comprising: • means for detecting slip between said wheels and said rails, supplying slip detection information, • means for determining braking force correction instructions as a function of the slip detection information, and • a first interface specifically for transmitting the braking force correction instructions, - a traction control device, comprising: • a second interface, specifically for receiving the braking force correction instructions, and • means for varying a wheel braking force, as a function of the braking correction instructions, wherein the first and second interfaces are of digital type, the braking system comprising a digital link between the first and second interfaces, specifically for transmitting the braking force correction instructions between these first and second interfaces, in the form of digital information, the digital link transmitting at least first and second digital information items in binary form, and characterized in that the determination means establish the binary values of the first and second digital information items as a function of the slip detection information, and the variation means act on the braking force according to the relationship below: - when the first and second digital information items are both equal to a same first value chosen from zero and one, the variation means increase the braking force, - when the first and second digital information items are both equal to a same second value, different from the first value, chosen from zero and one, the variation means reduce the braking force, and - when the first and second digital information items are respectively equal to distinct values chosen from zero and one, the variation means maintain the braking force. - a device for managing the grip of wheels of the car and of the rails, during braking, comprising: • means for detecting slip between said wheels and said rails, supplying slip detection information, • means for determining braking force correction instructions as a function of the slip detection information, and • a first interface specifically for transmitting the braking force correction instructions, • means for detecting slip between said wheels and said rails, supplying slip detection information, • means for determining braking force correction instructions as a function of the slip detection information, and • a first interface specifically for transmitting the braking force correction instructions, - a traction control device, comprising: • a second interface, specifically for receiving the braking force correction instructions, and • means for varying a wheel braking force, as a function of the braking correction instructions, wherein the first and second interfaces are of digital type, the braking system comprising a digital link between the first and second interfaces, specifically for transmitting the braking force correction instructions between these first and second interfaces, in the form of digital information, the digital link transmitting at least first and second digital information items in binary form, • a second interface, specifically for receiving the braking force correction instructions, and • means for varying a wheel braking force, as a function of the braking correction instructions, wherein the first and second interfaces are of digital type, the braking system comprising a digital link between the first and second interfaces, specifically for transmitting the braking force correction instructions between these first and second interfaces, in the form of digital information, the digital link transmitting at least first and second digital information items in binary form, - when the first and second digital information items are both equal to a same first value chosen from zero and one, the variation means increase the braking force, - when the first and second digital information items are both equal to a same second value, different from the first value, chosen from zero and one, the variation means reduce the braking force, and - when the first and second digital information items are respectively equal to distinct values chosen from zero and one, the variation means maintain the braking force.