This system is a preparation for safety switches consisting of a combination of safety switch, mounting plates/elements and bolts from a wide range of safety switch manufacturers such as Dold, Euchner, Fortress Interlocks, Pilz or Telemecanique Sensors. With the BRÜHL-RI (RV) system, the safety switch is mounted with an exact fit and thus guarantees a long-lasting latch function. A high installation effort is saved by using standard drilling patterns on BRÜHL hinged doors.