add-on mod. built-in speaker Door communication

Product description

Add-on module for built-in speaker - Up to twelve mechanical bell buttons can be connected. - Additional bell buttons can be connected via additional add-on modules. - Up to eleven add-on modules can be connected to one built-in speaker. - Alternating current polling of the bell button connections to prevent oxidation on the button contacts. - Compact size. - Securing of connection terminals against incorrect connection. - Attachment of the add-on module with screws or gluing. Module for extension of the built-in speaker when more than eight mechanical bell buttons are to be connected. This component enables door communication systems with up to 140 audio devices to be set up (e.g. 1 x built-in speaker, 11 x add-on modules for built-in speakers, 136 x surface-mounted home stations). Protection type IP44 only in combination with a suitable front or when installed. The mounting materials are included with delivery.