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Extension module for built-in loudspeaker Features: Up to twelve mechanical bell pushes can be connected. Further bell push buttons can be connected via additional extension modules. Up to eleven extension modules can be connected to one built-in loudspeaker. AC voltage interrogation of the bell push button connections to prevent oxidation at the push button contacts. Small design. Protection of the connection terminals against incorrect connection. Fixing of the extension module by screwing or gluing. Remarks : Module for extension of the built-in speaker if more than eight mechanical bell pushes are to be connected. With this component it is possible to set up door communication systems with up to 140 audio users (e.g. 1 x built-in loudspeaker, 11 x extension module for built-in loudspeaker, 136 x surface-mounted home station). Protection class IP44 only in conjunction with a suitable front or in the installed state.
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