The detector head is installed in the Detector Base MS 400. The base is suitable for surface-mounted cable feeds as well as for flush-mounted cable feeds, and has separate attachment points for ceiling mount/flushmounted back boxes. In addition, it fits all standard bore patterns. The Detector Base made of white ABS plastic (Novodur, color similar to RAL 9010) has a matt finish and seven terminal screws to connect the detector and its features to the fire panel. Contacts connected to the terminals guarantee a secure electric connection when the detector module is installed. Cables up to 2.5 mm2 in diameter can be used. To protect against unauthorized removal, the detector head can be secured with a variable locking.