General
Material	Aluminium
Design	V2A design
Transmission range	0.2 to 10 m
Beam angle horizontal	80° to 120°
Beam angle vertical	40° to 110°
Number of relays	1
Relay type	Dry contact

The motion sensor module from Telecom Behnke is an installation device for detecting movements in low-voltage systems, particularly in intercom systems. It is made of aluminium and features a V2A design, providing a robust and aesthetically pleasing appearance. The device is used for the automatic activation of functions, such as lighting or intercom systems, as soon as a person moves within the detected area. The sensor unit is designed for indoor use and allows flexible adaptation to different room geometries.

Applications
The motion sensor is intended for use in buildings with low-voltage systems, particularly in intercom systems, where it can be used to automatically activate door openers or doorbell chimes. It is suitable for rooms of limited size up to larger areas, as the range and beam angle can be adjusted according to specific requirements. Typical applications include hallways, entrance areas, stairwells, or other areas where automatic activation upon human movement is beneficial.

Functions and Equipment in Detail
The device features an adjustable range, which can be set between 0.2 and 10 metres. This adjustability allows precise adaptation to the respective environment to avoid false alarms or to optimise coverage. The beam angle is also variable: horizontally it ranges from 80° to 120°, vertically from 40° to 110°, with values varying depending on distance. This means that the angle may be wider at shorter distances and narrower at maximum range. The sensor unit is equipped with a potential-free relay, serving as a switching contact for external devices. This relay enables the control of loads connected via an electrical connection, without requiring direct voltage transmission.

Technology Explained Simply
The motion sensor operates on the basis of infrared technology, detecting movements by recognising temperature differences in the room. Configurable parameters such as range and beam angle are adjusted via internal mechanisms or switches integrated into the device. The use of a potential-free relay means the device functions as a switching stage, capable of activating a load (e.g. a lamp or door opener) without direct voltage transmission. This increases safety and simplifies integration into existing systems. The V2A design made of aluminium ensures high mechanical stability and corrosion resistance, extending the device’s service life.

Compatibility and Accessories
The module is designed for integration into existing low-voltage systems, particularly intercom systems. It can be combined with other components from the same product family to create a coherent and functional system. It is used in conjunction with an appropriate network or control unit that signals the relay. Installation is carried out in a suitable housing or directly on the wall, depending on the system requirements.

Mounting and Installation
The motion sensor is mounted in a suitable installation space, for example in a wall socket or distribution box. Positioning is crucial for functionality: the sensor should be placed so that the entire area to be monitored is covered, without obstructions interfering with signal transmission. Electrical connections are made via the terminal clamps, designed for connection to the relay and control unit. Range and beam angle settings are adjusted before commissioning to ensure optimal coverage.

Advantages in Operation
The use of the motion sensor enables automated and energy-saving control of functions in low-voltage systems. The configurable parameters ensure high adaptability to different rooms and requirements. The use of a potential-free relay reduces installation complexity and increases safety. The robust V2A design made of aluminium ensures long service life and high reliability under normal operating conditions. Integration into existing intercom systems is straightforward and does not require extensive modifications to existing infrastructure.