Adaptor with fail safe mechanism. The FDA  is equipped with an integrated fail-safe mechanism which ensures that a  burnout in one loudspeaker does not lead to a failure in the entire  system of connected speakers. The FDA  is equipped with a ceramic terminal, a thermal fuse and a  heat-resistant high-temperature wiring (10 cm) so that it conforms to  both Dutch (NEN 2575) and British (BS 5839) regulations for alarm  systems.
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