Circuit arrangement to control system and system with circuit arrangement

A system including a pneumatically adjustable lumbar support, the system comprising:

• at least two air cushions, each air cushion being connected to a pump for filling the air cushion with air via a supply line, each air cushion also being connected to the ambient atmosphere via an atmosphere connection for emptying the air cushion, wherein, for each air cushion, a valve is located at least in one of a respective supply line of the air cushion and between the air cushion and the respective atmosphere connection, the valve being adjustable between an opening position, in which the valve one of opens the supply line and unblocks the atmosphere connection, and a closing position, in which the valve one of closes the supply line and closes the atmosphere connection;
• and
• a circuit arrangement including:
• at least four actuators each actuator having at least one positioning element, each positioning element being adjustable between a first position and second position;
• at least one voltage supply path and one ground path which form at least four current paths between respective ones of the voltage supply paths and the ground path, wherein the at least four actuators are integrated in pairs into a circuit between the voltage supply path and ground path so that each pair of the actuators are connectable in series in one of the current paths and fed with current to activate a respective positioning element;
• and
• electronic switching elements to selectively feed current to at least one of:
• none of the current paths, and one of the current paths.