[SM9561]  Outdoor stainless steel light sensor


SM9561

Technical Parameters

Technical parameterParameter value
BrandSONBEST
Illuminance measuring range0~20 0000Lux
Illuminance allow deviation±7%
Repeatability test±5%
Illuminance detection chipImport digital
Wavelength range380nm~730nm
InterfaceRS485/4-20mA/DC0-5V
PowerDC12~24V 1A
Running temperature-25~80°C
Working humidity5%RH~90%RH

Product Selection

    Product DesignRS485,4-20mA,DC0-5VMultiple output methods, the products are divided into the following models depending on the output method.
Product model output method
SM9561BRS485总线
SM9561M4-20mA
SM9561V5DC0-5V

Product Size

SM9561

Why choose this product?

SM9561 SM9561 SM9561

Application solution

SM9561

How to use?

SM9561 SM9561

Pictures

SM9561 SM9561 SM9561 SM9561

Communication Protocol

    The product uses RS485 MODBUS-RTU standard protocol format, all operation or reply commands are hexadecimal data. The default device address is 1 when the device leaves the factory, and the default baud rate is 9600,8,n,1 .
1. Read data (function code 0x03)
    Inquiry frame (hexadecimal), sending example: query 1 data of 1# device, the upper computer sends the command: 01 03 00 00 00 01 84 0A .
Address Function Code Start Address Data Length Check Code
010300 0000 0184 0A
    For the correct query frame, the device will respond with data: 01 03 02 00 79 79 A6 , response format:
Address Function Code LengthData 1Check Code
0103 0200 79 79 A6
    Data description: The data in the command is hexadecimal, take data 1 as an example, 00 79 is converted to decimal value as 121, assuming the data magnification is 100, then the real value is 121/100=1.21, Others and so on.
    For illuminance, since each parameter occupies 2 bytes and the actual resolution of illuminance in the 200,000 range is lower than 10, we use 20,000 or 20,000 to express 200,000, that is The magnification is 10. For example, when the read data is 839, the actual illuminance value is 8390LUX.
2. Common data address table
Configuration Address Register Address Register Description Data Type Value Range
4000100 00IlluminanceRead Only0~65535
4010100 64Model CodeRead/Write0~65535
4010200 65 total number of measuring points read/write 1~20
4010300 66device addressread/write1~249
4010400 67baud rateread/write0~6
4010500 68communication moderead/write1~4
4010600 69protocol typeread/write1~10

  For example, the range is 0~20Lux, the analog output is 4~20mA current signal, Illuminance and current The calculation relationship is as shown in the formula: C = (A2-A1) * (X-B1) / (B2-B1) + A1, where A2 is Illuminance range upper limit, A1 is the lower limit of the range, B2 is current output range upper limit, B1 is the lower limit, X is the currently read Illuminance value, and C is the calculated current value. The list of commonly used values is as follows:
current(mA)IlluminanceValue (Lux) Calculation Process
40.0(20-0)*(4-4)÷(20-4)+0
51.3(20-0)*(5-4)÷(20-4)+0
62.5(20-0)*(6-4)÷(20-4)+0
73.8(20-0)*(7-4)÷(20-4)+0
85.0(20-0)*(8-4)÷(20-4)+0
96.3(20-0)*(9-4)÷(20-4)+0
107.5(20-0)*(10-4)÷(20-4)+0
118.8(20-0)*(11-4)÷(20-4)+0
1210.0(20-0)*(12-4)÷(20-4)+0
1311.3(20-0)*(13-4)÷(20-4)+0
1412.5(20-0)*(14-4)÷(20-4)+0
1513.8(20-0)*(15-4)÷(20-4)+0
1615.0(20-0)*(16-4)÷(20-4)+0
1716.3(20-0)*(17-4)÷(20-4)+0
1817.5(20-0)*(18-4)÷(20-4)+0
1918.8(20-0)*(19-4)÷(20-4)+0
2020.0(20-0)*(20-4)÷(20-4)+0
    As shown in the above formula, when measuring 8mA, current current is 9Lux。
  For example, the range is 0~20Lux, the analog output is 0~5V DC0-5Vvoltage signal, Illuminance and DC0-5Vvoltage The calculation relationship is as shown in the formula: C = (A2-A1) * (X-B1) / (B2-B1) + A1, where A2 is Illuminance range upper limit, A1 is the lower limit of the range, B2 is DC0-5Vvoltage output range upper limit, B1 is the lower limit, X is the currently read Illuminance value, and C is the calculated DC0-5Vvoltage value. The list of commonly used values is as follows:
DC0-5Vvoltage(V)IlluminanceValue (Lux) Calculation Process
00.0(20-0)*(0-0)÷(5-0)+0
14.0(20-0)*(1-0)÷(5-0)+0
28.0(20-0)*(2-0)÷(5-0)+0
312.0(20-0)*(3-0)÷(5-0)+0
416.0(20-0)*(4-0)÷(5-0)+0
520.0(20-0)*(5-0)÷(5-0)+0
    As shown in the above formula, when measuring 2.5V, current DC0-5Vvoltage is 10Lux。
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TYPE: SM9561

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