Bus internal siren, optically and acoustically signals alarm states, the entry and exit delay of the System 9000 and the state of a switching output. Can be assigned to one or more areas. Volume of the piezo siren: 90 dB(A). Has a programmable button, e.g. as a panic button, alarm confirmation or acknowledgement. Occupies an address in the system. Power supply via bus, quiescent current consumption: 5mA, I-calc =30mA. Operating temperature: -10°C to +40°C. As a bidirectional component, there is no support via a 9000FR radio repeater. Dimensions: 80 x 80 x 30mm.