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MSA237K 99 A

24GHz Large-space presence sensor(KNX version)

MSA237K 99 A is a 24GHz radar sensor based on Merrytek patented orthogonal half-wave bending antenna. Its antenna has high gain and wide detection range and is combined with Merrytek’s unique software algorithm. It can accurately detect minor movements brought by human in almost all indoor spaces and provide fast and accurate front-end sensing input for smart home, smart hotel, smart office and other scenes by KNX communication.

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Features

  • Exclusive Merrytek Lifebeing Presence Detection
  • FMCW modulation technology applied to detect micro movement brought by breathing
  • Germany RF technology applied for 5-year guarantee assurance
  • Accurate Presence/Absence Output
  • Daylight Sensor Available
  • Support KNX communication
  • 24Ghz ISM Band Millimeter Wave Radar technology
  • Major/Minor/Micro Motion detection diameter: 6-8m Max
  • Major/Minor/Micro Motion detection range are highly coincide
  • Round radiation. Effectively managing a whole space by a single sensor
  • Absence switch to Presence within 0.5S
  • Presence switch to Absence no less than 15S
  • Flush mounting installation available
  • Sensor parameter adjustable by ETS or remote
  • Sensing function based on millimeter wave radar technology
  • Low RF power output. No harm to human health
  • Not affected by temperature, humidity, noise, airflow, dust, light and other environments

Dimension & Function Diagram

Parameter characteristics

Input/Output Auxiliary Power Supply Voltage Range 12-30V DC
KNX Terminal Voltage 21-30V DC
Auxiliary Power Supply Working Current 12V : 55±3mA Max   24V:  30±3mA Max
KNX Terminal Current 3±1mA
Working Power ≤1W @24V DC
Sensor Parameter Working Frequency 24GHz-24.25GHz    ISM band
Transmitting Power 5mW Max
Detection Area ETS/remote setting: 0.5-4m
Hold Time ETS/remote setting: 3S-7200S Remark: For better presence detection,hold time shall set >30S
Detecting Range
(100% detection area, radius)
major/minor/micor movement(3m height installation): 3.5±0.5m(based on 41㎡ open area test and might change due to different space)
Remote Control Support
Mounting Height 2-4m, typical value: 3m
3db Beam Angle 100° (XZ field)
100° (YZ field)
Application environment Flush-mounted Hole Size Φ50-55mm
Working Temperature 0℃…+50℃
Storage Temperature -40℃…80℃, Humidity: ≤85%(non-condensing)
Certificate Standard Certificate FCC/RED
Environmental Requirement Compliant to RoHS
IP Rating IP20
Gurantee 5 year(only for product quality problem under indoor application)
“N/A” means not available

Product details

Dimension

  • Product size: φ63x35mm
  • Connection interface:Auxiliary power supply: 4-pin yellow and white shrapnel lifting terminals
  • KNX bus terminal: 4-pin red and black KNX terminals

 

Initialization

When powered on,sensor indicator will turn off after flashing for 10S and will enter a 20S detection cycle,if there’s presence detected,then sensor will enter hold time calculating,if absence detected,then sensor relay will disconnect.During initialization,sensor will not detect moving signal and you can use our MH10 remote to adjust detection area、hold time and daylight sensor etc parameter.

 

Factory setting

Detection Area: 4m,  Hold Time: 30S,  Indicator Light: open,  Sensitivity : medium sensitivity

 

Detection Signal

The product detects human moving, minor moving, and presence signals, and realizes the detection of human-existing/no-human in non-sleep state. The following is a description of the moving, minor moving and presence signals:

  • Majormovement: detect the human significant moving (walking) in the detection area.
  • Minor movement: detect the human slight moving in the detection area, such as leaning forward, leaning forwarder and back, swinging limbs, shaking head, typing, playing with mobile phones and so on.
  • Micro movement: detect human abdominal and thoracic expansion behaviors caused by breathing, but not detect moving signal and minor moving signal.

Wiring suggestions

 

Wiring layout suggestion:

  1. KNX bus wiring suggestion hand in hand to the end, star or tree wiring is not recommended to ensure the stability of signal transmission.
  2. KNX bus wiring wire recommends KNX standard EIB shielded wire or Category 6 network cable, the length of the bus wiring is recommended not to exceed 400 meters, and the number of sensor connected to a bus is recommended to not exceed 12.
  3. The number of sensors connected to a bus needs to fully consider the current load capacity of the power supply: that is the sum of the currents of all KNX devices (including sensors) shall not be greater than the load current of the KNX power supply.

Installation suggestion

N/A

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