Product Detail

Module description

XRDY-3M  human body sensing module: It is a digital intelligent automatic control product based on passive human infrared technology, with high sensitivity.

, strong reliability, widely used in all kinds of automatic induction electrical equipment.

Functional characteristics

1. PIR metal shell is wrapped and grounded, and digital signal processing is adopted inside, which directly outputs high and low levels, thus enhancing anti-interference.

2. Repeatable trigger mode: After the induction outputs a high level, if a human body moves in its induction range during the delay time period, its output will remain at a high level all the time, and the time set by the delay will only change to a low level after the person leaves (that is, the induction module will automatically postpone a delay time period after detecting each activity of the human body, and the time of the last activity will be taken as the starting point of the delay time).

Technical parameter

1.Operating voltage: DC 3.5V-12V；;

2.Static current: ≤ 20UA;

3.Sensitivity (SENS): not adjustable;

4.Light control (DARK_ADJ): not adjustable;

5.DELAY_TIME):2 2 seconds, not adjustable;

6.Blocking time: not adjustable (2 seconds);

7.Trigger mode: repeatable;

8.Output mode: 3V high and low level output;

9.Sensing range: angle ≤110 degrees cone angle; Distance ≤ 4m;

10.Working temperature: -20℃-+55℃

11.Overall dimensions of PCB: 10mm*8mm

Actual picture

The picture is for reference only, and does not mean that it has a certain function.

Functional diagram

The picture is for reference only, and does not mean that it has a certain function.

Function declaration

1. DC-INPUT: it is the working voltage and input power supply voltage, and the range is (DC 3.5V-12V).

2. VOUT: 3V high and low level output; When there is an inductive output, it is a high-level 3V; When there is no inductive output, it is low level 0V.

Schematic diagram of module

Matters need attention

1.PIR is a pyroelectric infrared sensor for detecting infrared changes. Detection of heat sources outside the human body, or without temperature change and movement of heat sources, may not be possible. Pay attention to the following general matters. Be sure to confirm the performance and reliability through the actual use status.

1）When detecting heat sources outside the human body

（1）When small animals enter the detection range

（2）When the far infrared direct sensor of sunlight, automobile headlights, incandescent lamps, etc.

（3）When the temperature in the detection range changes drastically due to the warm air and cold air of the cold greenhouse equipment and the water vapor of the humidifier, etc.

2）When it is difficult to detect heat source

（1）When there are substances such as glass and acryl which are difficult to transmit far infrared rays between the sensor and the detected object

（2）When the heat source in the detection range hardly moves, or moves at a high speed. 

2. When the detection area is enlarged.

When the temperature difference between the ambient temperature and the human body is large (above about 20℃), even if it is outside the specified detection range, there is sometimes a wide detection area.

3. About other uses

1）When there are stains on the window, it will affect the detection performance, so please pay attention.

2）The lens is made of weak material (polyethylene). After the load or impact is applied to the lens, it will cause poor movement and performance deterioration due to deformation and damage, so please avoid the above situation.

3）Static electricity above 200 V may cause damage. Therefore, please be very careful when operating, and avoid touching terminals directly with your hands.

4）In the case of welding wires, please do the welding within 3 seconds when the soldering iron temperature is below 350℃. When soldering through solder bath, it may lead to performance deterioration, so please avoid it.

5）Please avoid cleaning this sensor. Otherwise, the cleaning solution intrudes into the lens, which may cause the performance deterioration.

6）In order to prevent the influence of interference, it is recommended to use shielded wires and shorten the distribution as much as possible.

7）Fresnel lens and finished shell must be installed first (the iron shell and pins of the sensor cannot be exposed) before testing, otherwise the sensing effect will be poor and the wind will easily cause misoperation.

8）Each Fresnel lens has a fixed focal length, so be sure to pay attention when installing. If the focal length is not adjusted properly, the sensing sensitivity will be reduced.