Merrytek MSA021D RC User Manual page 2

1. The product shall be installed by a professional electrician. Please disconnect the
power before installation and wiring. Before the product is powered on, please
confirm that the input voltage range meets the requirements of the manual.
2. Please read the relevant contents in this manual carefully before using the product.
3. This product is designed for indoor use only.
4. Ensure that the product is installed in a relatively dry and ventilated environment.
5. Keep away from metal plates, concrete walls, and beams during installation to
avoid blocking microwave signals.
6. Install the sensor as far as possible from glass, wood, gypsum board and other
materials that are easily penetrated by microwaves to avoid false triggering.
7. Avoid long-term vibrating equipment or moving objects around the sensor. The
vibration signal will be regarded as the motion signal to trigger the sensor.
8. If a pet passes by in the detection area, it may trigger the sensor.
9. The sensor should be installed far away from wireless devices such as network
switches and routers, and installation interval should be at least 2 meters to avoid
radio interference.
10. In order to ensure the accuracy of presence detection, the sensor should be
installed in the area of personal activity and avoid installing behind the person.
This product uses Merrytek 5.8GHz high-gain microwave presence sensing
technology, which can detect the large-scale movement and the tiny movements in
a static state (such as: waving hands, shaking the head, and chest and abdomen
expansion during breathing) of the human body to determine whether there are
people in the detection area. MSA021D RC is powered by a 12V/24V low-voltage
DC power supply, and uses a silent reed switch normally open relay, which is closed
when there is motion detected and disconnected after the preset "Hold time"
elapses when there is no one. Connect various intelligent control systems through
output switches.
ATTENTION
Product Introduction