An electro-pneumatic brake device, having a) a first electro-pneumatic pressure regulating module that has a first relay valve device, a first inlet/outlet solenoid valve combination that pneumatically controls the first relay valve device, a first backup solenoid valve, a first pressure sensor connected to a first working outlet of the first relay valve device, and a first electronic control system that controls the first inlet/outlet solenoid valve combination and the first backup solenoid valve and receives signals representing the pressure at the first working outlet in order to regulate a first brake pressure at the first working outlet, b) a first supply port of the first pressure regulating module, which first supply port is connected to a first supply inlet of the first relay valve device and to an inlet valve of the inlet/outlet solenoid valve combination, c) the first working outlet of the first relay valve device being connected to a first working port of the first pressure regulating module that is connected directly or indirectly to at least one first pneumatic brake cylinder, and d) the first supply port of the first pressure regulating module being connected to a first compressed-air supply, characterised in that e) the first supply port of the first pressure regulating module is connected to a third compressed-air supply that is independent of the first compressed-air supply, f) the first supply port being connected to the first compressed-air supply via at least one first check valve and to the third compressed-air supply via at least one second check valve, g) the check valves (42, 48) each comprising at least one valve closing element that is forced by spring forces exerted by at least one spring element against a valve seat and permitting compressed air to flow in the forward direction from either of the compressed-air supplies (40, 46) or from both compressed-air supplies (40, 46) simultaneously into the first supply port when the valve closing element is lifted off the valve seat but preventing compressed air from flowing in the reverse direction from the first supply port into one of the two compressed-air supplies (40, 46) or into both of the compressed-air supplies (40, 46) and from flowing in the reverse direction from the first compressed-air supply into the third compressed-air supply or from the third compressed-air supply into the first compressed-air supply when the valve closing element is forced against the valve seat. a) a first electro-pneumatic pressure regulating module that has a first relay valve device, a first inlet/outlet solenoid valve combination that pneumatically controls the first relay valve device, a first backup solenoid valve, a first pressure sensor connected to a first working outlet of the first relay valve device, and a first electronic control system that controls the first inlet/outlet solenoid valve combination and the first backup solenoid valve and receives signals representing the pressure at the first working outlet in order to regulate a first brake pressure at the first working outlet, b) a first supply port of the first pressure regulating module, which first supply port is connected to a first supply inlet of the first relay valve device and to an inlet valve of the inlet/outlet solenoid valve combination, c) the first working outlet of the first relay valve device being connected to a first working port of the first pressure regulating module that is connected directly or indirectly to at least one first pneumatic brake cylinder, and d) the first supply port of the first pressure regulating module being connected to a first compressed-air supply, characterised in that e) the first supply port of the first pressure regulating module is connected to a third compressed-air supply that is independent of the first compressed-air supply, f) the first supply port being connected to the first compressed-air supply via at least one first check valve and to the third compressed-air supply via at least one second check valve, g) the check valves (42, 48) each comprising at least one valve closing element that is forced by spring forces exerted by at least one spring element against a valve seat and permitting compressed air to flow in the forward direction from either of the compressed-air supplies (40, 46) or from both compressed-air supplies (40, 46) simultaneously into the first supply port when the valve closing element is lifted off the valve seat but preventing compressed air from flowing in the reverse direction from the first supply port into one of the two compressed-air supplies (40, 46) or into both of the compressed-air supplies (40, 46) and from flowing in the reverse direction from the first compressed-air supply into the third compressed-air supply or from the third compressed-air supply into the first compressed-air supply when the valve closing element is forced against the valve seat.