System and method for evaluating a module

A system, having

• a module (M) comprising a first mechanical switch (S1) and an electrode (E1), and
• a circuit arrangement (8) having
• a terminal (9) that is connected to the module (M),
• a drive unit (A) for providing a drive signal (Sa), the drive unit (A) being connected to the terminal (9),
• a first evaluation unit (B) for key detection, the first evaluation unit (B) being connected to the terminal (9), and
• a second evaluation unit (C) for proximity detection, the second evaluation unit (C) being connected to the first evaluation unit (B),
• wherein the drive signal (Sa) is designed for driving the electrode (E1) of the module (M) as an electrode (E1) of a capacitive proximity sensor,
• wherein the first evaluation unit (B) is designed to provide a touch signal (Sb) as a function of an actuation of the module (M) by a person, and
• wherein the second evaluation unit (C) is designed to provide a proximity signal (Sc) as a function of the approach of a person to the module (M),
• wherein one contact of the first switch (S1) of the module (M) is electrically connected to the electrode (E1) of the module (M),
• characterized in that the capacitive proximity sensor of the module (M) is realized in the form of the contact of the first switch (S1).