A motion sensor is an electronic device that reacts to the appearance and movement of objects in the area of action by closing the power circuit. Depending on the viewing angle and other operating parameters, the device can be successfully used to protect objects, ensure safe passage at night and for other purposes related to everyday and professional human activities. The use of sensors in everyday life and in commercial facilities is dictated by safety considerations, as well as by the need to save energy and other resources in places where their constant consumption is not necessary.
Motion sensor circuit for lighting
Under the rear cover of the device, there is a terminal block with three colored wires led outside the body. The wires are connected to terminal clamps or to insulated lugs if the connection is made using a multicore cable. The sensor is connected to the mains, power is supplied through the brown wire of phase L and through the blue wire of the zero phase. At the exit from the case, both phases go to the incandescent lamp of the lighting device or to other devices, the inclusion of which is necessary when signs of movement appear in the coverage area. If movement is detected in the sensitivity area, the device is triggered, the relay contact closes with current supply to the lamp, and it turns on.
You can get comprehensive information about the design of the purchased motion sensor from the manufacturer's instructions attached to the device. In addition, a schematic representation of the optimal connection method is indicated on the cover of the model.
The principle of operation is simple. When a moving object appears in the coverage area, the electrical network instantly closes, including the devices and equipment connected to the sensor: lighting, air conditioning and ventilation systems, etc. If there are no signs of movement for a certain period of time, the electrical circuit is opened, all devices are turned off. Thus, it is possible to avoid the continuous operation of energy-intensive devices and economically consume their working resource.
Connecting light sensors
- A schematic diagram of the connection of the phase wire attached to the device manual is being studied.
- The housing cover is removed.
- The device is connected to the power supply using wires that are fixed on the screw terminals of the terminal block.
- The cables are connected in the junction box. It has seven wires - supplying zero and phase, three sensor cables and two lamp cables. In the supply cable, the zero is marked in blue, the phase is in brown. For the cable connected to the sensor, the insulation of the phase conductor is colored white, the zero one - green. The remaining red cable is connected to the load. Phase wires are separately connected, separately - neutral wires of the network, sensor and lamp. Then connect the red sensor cable and the brown phase cable of the luminaire.
Failure to connect the wires may result in serious damage and burnout of the device. If you cannot connect the devices on your own, you should use the qualified help of specialists.They will carry out installation work in full and configure all the equipment, taking into account the peculiarities of its operation and your wishes.
Connection diagram for DD with a switch for street lighting
If it is necessary to turn on the power in the tracking zone outside the moment of its operation, an additional switch is connected to the network. Its presence does not affect the operation of the monitoring device, since in this case a parallel connection scheme is used. The sensor is still doing its job of detecting moving objects and switching networked devices. In turn, the switch allows:
- operate lights, ventilation and other devices independently of the sensor;
- extend their duration after the circuit in the relay opens;
- duplicate the operation of the sensor by controlling the lighting in forced mode.
Installing a switch at the exit from the house into an unlit area can be called advisable. Such a solution will not require large expenses, but it will increase the level of safety when moving around the territory near the house in an unlit time of the day.
Recommendations for choosing a place of installation
Correct installation of the motion sensor to turn on the light involves taking into account the following points:
- The best location option is the area of contact between the illuminated and dark areas of the object. It is important that the device responds to movement immediately on the border of an unlit area, immediately turning on the lamp when a moving person moves to a dark part of the territory.
- Thanks to the adjustable base, the device can be focused to the desired point of the observation area - for example, at the gate of a private house or at the entrance to the territory of a commercial facility. Infrared radiation is directed to the side where the appearance of moving objects is most likely and prompt response is guaranteed.
In a small room, it is better to install the sensor in the upper part of the wall, in a private house - on the highest part of the building. This installation method will allow you to cover a large area
Post-connection setup
- TIME settings are offered in the range of 1 to 600 seconds. They can be added to thresholds ranging from 5 seconds to 8 minutes. During the selected time, the electrical circuit will be closed, and the connected devices will be in working order. The location of the sensor and its purpose are of particular importance. If we are talking about the territory near a private household, the operating time of the sensor and the searchlight connected to it at night must be calculated taking into account the speed of movement of a person from the gate of the gate to the threshold of the house. Typically, this is about 15-30 seconds. For sensors located in work or auxiliary rooms, it is better to increase the duration of illumination by a few minutes.
- The "LUX" setting allows you to adjust the sensor operation in conditions of full daylight illumination of the territory. The higher the selected value, the better the device will respond to movement in daylight - for example, on a sunny day outside or when there are many windows in the room. Otherwise, if the quality of the object's illumination is higher than the set parameter, the sensor may not work.
- The "SENS" regulator allows you to adjust the sensitivity of the device so that it clearly responds to the appearance of a person or a car in the controlled area, but does not work when pets are moving.Also, this parameter is responsible for the sensor's response to movement at the farthest border of the control zone. The higher its value, the more guarantees that the device will be triggered by detecting movement at a considerable distance within the protected object. In the winter season, in conditions of lower illumination, the sensitivity should be increased, and with the onset of summer, it should be decreased, thereby eliminating false alarms. In some cases, the sensitivity of the sensor can be increased by changing the angle of its direction.
All sensor settings are set and tested in experimental mode until optimal results are achieved. High response frequency or low sensitivity can be corrected by changing the corresponding setting up or down. If necessary, the specialists of the selling company can be involved in the installation work and additional settings. They can also provide advice on all aspects of the operation and maintenance of the sensor.
