General
Product type	Function module
Manufacturer	Telecom Behnke
Material	Aluminium
Function	call button with illumination ring
Pictogram	door open
Illumination colours	red / yellow
Compatibility	Door entry stations Series 20
ear category (ElektroG)	irrelevant

The function module 20-2051 from Telecom Behnke is an HMI button module for door intercom stations of the Series 20. It serves as an additional control unit that is integrated into existing installations to extend user interaction. The module features a central call button equipped with an illumination ring and displays a pictogram with the label Door open. The illumination is provided in red and yellow, enabling visual signals for different states or functions. The module has a square shape with dimensions 90 mm height and 90 mm width, and is made of aluminium, ensuring a robust and durable construction.

Applications

The module is designed for use in industrial and commercial environments where clear and reliable operation of door intercom stations is required. It is particularly suitable for installations requiring visual feedback on door status or additional control functions. Its use in door intercom systems of Series 20 enables modular expansion of existing infrastructure without extensive modifications.

Functions and Equipment in Detail

The central call button enables triggering of a signal, for example for door opening or to indicate a call. The integrated illumination ring serves as visual feedback and can light up in red and yellow to indicate different states such as door open" or "call active". The "Door open pictogram supports operation through clear symbolism, especially in environments with high noise levels or limited visibility. The choice of aluminium material ensures high mechanical stability and resistance to wear.

Technology Explained Simply

The module is designed as an HMI button (Human-Machine-Interface button), meaning it functions as an interface between the user and the electronic system. The illumination is provided by an integrated light source controlled via the system. The colour change between red and yellow serves as status indication and is part of user guidance. The aluminium construction offers good heat dissipation and is corrosion-resistant, increasing service life in operation.

Compatibility and Accessories

The module is specifically developed for door intercom stations of Series 20 from Telecom Behnke and can be integrated into these systems. No additional accessories or adapters are required to use the functionality. Compatibility is limited to Series 20; other systems are not explicitly mentioned.

Mounting and Installation

Mounting is carried out into the designated mounting openings of the Series 20 door intercom station. No additional tools or mounting aids are required, as the module is mechanically installed into the system. The electrical connection is made via the existing connectors of the door intercom station.

Operational Advantages

The clear visual signalling function through illumination in red and yellow improves user guidance and reduces operating errors. The robust aluminium construction ensures high service life and resistance to mechanical stress. The modular design enables flexible expansion of existing installations without extensive changes to the system.