The intelligent addressable sensor standard base (CAB300) has been designed for flexibility, simplicity and speed of installation. The (CAB300) is compatible with the Cooper range of intelligent addressable sensors and fire systems. This intelligent addressable standard base incorporates a purpose designed shorting link to ensure wiring continuity if a sensor is removed. This device also has a retaining clip to provide positive feedback when the sensor is correctly fitted and a retaining clip that can be replaced with locking device (supplied with base) to prevent unauthorised sensor removal.