A braking control system for a railway or tramway vehicle with integrated anti-slip and anti-lock functions for the wheels

The system performs anti-slip and anti-lock functions of the wheels in a vehicle provided with a pneumatic braking system including brake control apparatus (BCA) to which is connectable a plurality of electro-pneumatic valve units (G1-G4) for control of the brake cylinders (BC1-BC4) associated with the wheels/axles (1-4). These valve units (G1-G4) can be controlled by control means (A,B), comprising first and second independent electronic control units (A,B).The first unit (A) is arranged to perform a wheel anti-slip procedure.The second unit (B) is arranged to perform a wheel anti-lock procedure when the state signal (L) transmitted to it from the first unit (A) indicates that this latter is in normal operation, and to perform both the anti-lock procedure and an anti-slip procedure when the state signal (L1) transmitted from the first unit (A) is indicative of a malfunction or breakdown condition of this latter.