General
Product type	Function module
Material	Aluminium
Number of keys	1
Key type	Emergency call push-button
Positioning	Centrical
Compatibility	Door intercom stations Series 20 without flat cable

The function module 20-2411-BS from Telecom Behnke is a single module for door intercom stations of series 20. It serves as an additional control unit that can be integrated into existing systems to enable additional functions such as an emergency call. The module is specifically designed for electronic configurations that do not use flat ribbon cables, and is made of aluminium, ensuring a robust and long-lasting construction.

Function module
The module features a single, centrally positioned emergency call mushroom button. This is designed as a mechanical actuation unit and triggers an emergency call signal as soon as it is pressed. The mushroom button is designed for use in industrial or commercial environments where clear, unambiguous operation is required. The function is independent of an external power supply, as it is directly integrated into the existing door intercom station.

Material and design
The module is made of aluminium, a material known for its high corrosion resistance and mechanical strength. The surface is smooth and easy to clean, making it suitable for applications with high hygiene requirements. The design is flat and rectangular, to integrate optically and functionally into existing door intercom systems of series 20. The central positioning of the emergency call mushroom button ensures intuitive operation.

Compatibility and integration
The module is specifically developed for door intercom stations of series 20 and can be integrated into systems that do not use flat ribbon cables. It is therefore compatible with the electronic components of this series, which use alternative connection techniques such as plug connections or cable terminals. Installation is carried out by mechanical mounting onto the existing door intercom station, with the electrical connection made via integrated terminals.

Applications
The module is particularly suitable for applications in industry, commerce and public institutions where a fast and reliable emergency call function is required. Examples include production halls, warehouses, hospitals or administrative buildings. The robust aluminium construction also makes it suitable for outdoor use, provided the rest of the door intercom station is adequately protected. The emergency call function can be integrated into existing security or alarm networks to enable a rapid response to emergencies.

Technology explained simply
The emergency call mushroom button is a mechanical switch that triggers an electrical signal when activated. This signal is transmitted via the integrated electronics of the door intercom station to the central system. Since the module does not require flat ribbon cables, it is suitable for systems that use other connection technologies. The use of aluminium ensures high mechanical stability and resistance to environmental influences such as moisture or mechanical stress.

Operational advantages
The integration of the module into existing door intercom systems of series 20 requires no extensive modifications. The emergency call function is immediately available once the module is installed. The clear, centrally positioned mushroom button enables quick and intuitive operation, even under stressful conditions. The robust aluminium construction ensures a long service life and low maintenance requirements.

Installation and mounting
Mounting is carried out on the existing door intercom station of series 20. The module is mechanically fastened, with the electrical connections made via integrated plug connections or cable terminals. It is important that the door intercom station does not use flat ribbon cables, as the module is specifically designed for this configuration. Installation requires no additional tools or components beyond those already present in the door intercom station.