CONVENTIONAL FIRE ALARM SYSTEM

bs-500: electronic telephone line sounder. it is powered with 230vac and is connected to the telephone line, in parallel to the telephone wires. it produces a high-pitched 100db, at 1 meter, sound during the call duration. it is used in places where the normal telephone ringer cannot be heard like factories, laboratories, and cafeterias and generally in places with a lot of noise.bs-505: electronic telephone line sounder with beacon. it is powered with 230vac and is connected to the telephone line, in parallel to the telephone wires. it produces a high-pitched 100db, at 1 meter, sound during the call duration. it is used in places where the normal telephone ringer cannot be heard like factories, laboratories, and cafeterias and generally in places with a lot of noise.bs-540: a general-purpose electronic sounder that produces a high-pitched 100db, at 1 meter, sound output when it is powered with a 12 or 24vdc. it is suitable for fire detection systems.bs-545: a general-purpose electronic sounder that produces a high-pitched 100db, at 1 meter, sound output when it is powered with 230vac.