So one of its functionalities is automatic lighting control using motion sensors.

This is what I want to tell you in detail.

After reading this article carefully, you can make your apartment or house a little more comfortable and “smarter”.

Purpose and application

The main purpose of motion sensors is to automatically turn on or turn off the load in a certain time interval when moving objects appear in the sensor's sensitivity zone. Also, such a sensor takes into account the level of illumination.

For switching load circuits, an electromechanical device built into the sensor is used.

Most often, motion sensors are used to control the lighting of streets or residential premises. Currently, we are installing motion sensors for automatic lighting control of vestibules and stairwells of entrances of residential apartment buildings.

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The relevance of the use of motion sensors to turn on the light is due not only to convenience and comfort. When using motion sensors, it is significantly reduced, which is important in our time, and the service life of the lamps themselves also increases.

The principle of operation of the sensor

The principle of operation of the motion sensor to turn on the light is very simple.

When any movement appears in the sensor's sensitivity zone, it starts to determine the level of illumination. And if the illumination level is below the triggering setting, then the sensor is triggered, thereby turning on the lamp with its output contacts.

Everything is correct. The logic is here. After all, if the movement will be during daylight hours, then why turn on the light, because during the day it is already light.

The power of the output circuits of the sensor depends on the type and variety of the sensor.

For example, for a motion sensor type DD-024, the power of the output circuits is about 600 (VA) for and 1100 (W) for incandescent lamps. Agree, very good.

Motion sensor for turning on the light type DD

To implement the above, I use infrared sensors such as DD-024 and DD-024V from IEK. There were no problems with them, so I recommend them for use. This is how it looks.

And these are its overall and installation dimensions.

The main characteristics of the infrared sensor are presented in the table below (click on the picture to enlarge):

Installation of motion sensors

Now let's analyze the issue of installing sensors, because. their accuracy and correct operation depend on this.

It is recommended to install and connect motion sensors only by a qualified person.

As a rule, a motion sensor to turn on the light is installed on the ceiling at a distance of 2 to 6 (m) from the floor. To avoid frequent false positives, the place of its installation is carefully chosen.

It is forbidden to install a motion sensor if its sensitivity zone includes:

• fans (moving and rotating parts, blades)
• passing vehicles (heat from engines)
• air conditioners (influence of negative temperature)
• heating pipes (influence of positive temperature)
• trees and shrubs
• various electromagnetic interference

Do not forget about the viewing angle of the sensor.

When installing the sensor on the ceiling, the viewing angle is 360 degrees, which is very good. If you install it on the side wall, then the viewing angle will decrease to 120-180 degrees.

The motion sensor is fixed to the surface in the following sequence.

1. Turn the protective cover of the sensor clockwise and remove it.

2. Access to two mounting holes and adjustment screws.

"LUX" - operation setpoint regulator depending on the level of illumination

"TIME" - time delay controller in the on state

"SENS" - infrared sensitivity setpoint control

Motion sensor connection diagram

The motion sensor must be powered through either a fuse, i.e. its supply circuits must be protected.

Connecting the sensor to faulty or damaged wiring is strictly prohibited.

The wires are connected to the terminal clamps. should not exceed 1.5 sq. mm on copper. By the way, follow the link and find out how you can.

The voltage from the supply wires must be removed during the connection of the sensor!!!

Below I will show you 3 options for connecting motion sensors for lighting. Choose your option according to your desires and needs.

Option 1

The first version of the sensor connection scheme is a standard solution. By the way, such a scheme is shown on the body of the sensor itself.

This circuit is the easiest to connect.

L - phase, N - zero, A - switched (output) phase from the sensor to the lamp.

Option 2

The second option (not standard) of the connection diagram, see below.

This sensor connection scheme can be used if you need the light to burn for a certain period of time, regardless of the illumination and movement. To do this, in the circuit, in parallel with the sensor, we connect the usual one (it is also possible when using one contact).

Option 3

The third option for connecting the motion sensor to turn on the light must be used, provided that the total output load (power of the lamps) exceeds the limit value (I talked about this at the very beginning of the article).

To do this, add a contactor with a coil voltage of 220 (V) to the circuit, or use two motion sensors connected to one load. About starters and contactors more like.

When connecting motion sensors to turn on the light, observe.

Checking the sensor after connection

After connecting the sensor, it is necessary to check it.

First of all, it is necessary to set the “LUX” regulator screw to the maximum-limit position (clockwise). The screw of the “TIME” regulator, on the contrary, is set to the minimum position (counterclockwise). Then apply voltage to the sensor. The red LED should immediately light up to indicate that the load is on.

If there is no movement, the sensor will turn off the load after about 25-30 seconds. The red LED indicator will turn off.

When movement is resumed, the sensor must turn on the load again (the red LED will light up again). And in the absence of any movements, turn it off after 5 seconds.

If the motion sensor test was successful, then we proceed to its configuration and adjustment.

Setting and adjustment

I will say right away that all adjustments are set according to your desires.

With the “TIME” regulator, we set the time delay setting for the motion sensor, which is in the on position. The trip setting is between 5 seconds and 480 seconds (8 minutes).

It all depends on the speed of the person in the zone of sensitivity of the sensor.

If a person will pass through this space relatively quickly (for example, a stairwell in an entrance or a corridor), then the TIME setting can be slightly reduced. If a person will be in this space for some time (for example, a pantry, utility room, car parking), then it is desirable to increase the “TIME” setting.

An incorrectly set "TIME" setting will only cause negative reactions.

Let me tell you about a personal example. I put a motion sensor in my entrance, and the “TIME” time was set to the very minimum. When opening my apartment, I had to wave my hands several times in order for the sensor to work again and turn on the light on the site. A little later, I adjusted the setting to a shutter speed that was convenient for me.

With the “LUX” regulator, we set the setting for operation according to the ambient illumination (from sunlight to twilight).

If you have a lot of windows in the room and natural light prevails, then it is better to set the “LUX” setting to the minimum or medium division of the scale. If in the room you have little natural light and it is dark, then I recommend setting the “LUX” setting to the maximum division of the scale.

Regulator "SENS" adjust the sensitivity to operation depending on the distance and volume of the object.

By the way, these sensors will only respond to the volume occupied by the human body. On small animals, such as a dog or cat, the sensors should not respond.

P.S. Well, that's probably all I wanted to tell you. If you have any questions, then ask them in the comments.