Compressed air supply installation for compressed air systems of vehicles

The pressurized air supply device has a multi-circuit protection valve (13-16), a pressure regulator (4) with a magnetic pre-control valve (23), a supply line (18) for supplying the multi-circuit protection valve and a compressor (1) which is switched via a pneumatic switching device (1a). A rapid venting valve (40) is provided between the switching device and the pressure regulator. An independent claim for a pneumatic system with a pressurized air supply device is also included.