Extension Module, black

Extends the built-in audio module assembly by a further 12 binary inputs. For the integration into letter boxes and bell systems of different manufacturers, such as the products of Erwin Renz Metallwarenfabrik GmbH & Co KG, Boschstr. 3, 71737 Kirchberg/Murr, Germany. With interface for the connection of additional built-in keypad extensions. The built-in audio module can be extended to a maximum of 99 inputs for doorbell push-switches with the aid of the built-in keypad extension. Consumer units: 1