Electropneumatic braking system architecture without direct pneumatic service brake redundancy on the rear axle (1P1E)

A redundancy module for a pneumatic braking system of a vehicle, in particular a commercial vehicle, with spring brakes on at least one axle, comprising:

• a parking brake pressure port configured to receive a force exerted by a parking brake pressure exerted in a first direction;
• a spring brake port configured to provide a force exerted by a spring brake pressure in the first direction;
• a redundancy pressure port configured to receive a redundancy pressure;
• and
• a piston assembly, with a reverse piston having a parking brake pressure control surface, a spring brake control surface, and a redundancy pressure control surface,
• wherein the parking brake pressure acting on the parking brake pressure control surface causes a control of the spring brake pressure, and
• wherein the redundancy pressure acting on the redundancy pressure control surface causes an inverse control of the spring brake pressure.