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                SM6901B    Us er Ma nual                   

http://www.sonbus.com/ 

Sha nghai Son

best Industrial Co., Ltd                                                                             Page1

 

 

SM6901B 

temperature, humidity, illuminance, carbon dioxide, smoke, 

methane, hydrogen sulfide, carbon monoxide eight-in-one 

hundred-leaf box sensor 

User Manual   

 

File Version: V21.3.24

   

        SM6901B using the standard    RS485 bus MODBUS-RTU protocol,easy access to PLC

DCS and 

other instruments or systems for monitoring temperature,humidity,Illuminance,carbon 

dioxide,conductivity,methane,conductivity,carbon monoxide state quantities.The internal use of 

Summary of Contents for SM6901B

Page 1: ...n sulfide carbon monoxide eight in one hundred leaf box sensor User Manual File Version V21 3 24 SM6901B using the standard RS485 bus MODBUS RTU protocol easy access to PLC DCS and other instruments or systems for monitoring temperature humidity Illuminance carbon dioxide conductivity methane conductivity carbon monoxide state quantities The internal use of ...

Page 2: ...st 5 Illuminance detection chip Import digital Wavelength range 380nm 730nm CO2 range 0 5000ppm CO2 accuracy 100ppm Smoke measuring range 0 5000ppm Smoke allow deviation 7 Smoke Repeatability test 5 Smoke detection chip Import digital Temperature characteristics 0 5 CH4 measuring range 0 5000ppm CH4 allow deviation 7 CH4 Repeatability test 5 Temperature characteristics 0 5 H2S range 0 100ppm H2S a...

Page 3: ... 00 7C 00 7D 00 7E Data Description The data in the command is hexadecimal Take data 1 as an example 00 79 is converted to a decimal value of 121 If the data magnification is 100 the actual value is 121 100 1 21 Others and so on 2 Data Address Table Address Start Address Description Data type Value range 40001 00 00 1 temperatureregister Read only 0 65535 40002 00 01 2 temperatureregister Read onl...

Page 4: ...irst byte is the new device address After the general device address is changed it will take effect immediately At this time the user needs to change the query command of the software at the same time 4 Read and Modify Baud Rate 1 Read baud rate The device default factory baud rate is 9600 If you need to change it you can change it according to the following table and the corresponding communicati...

Page 5: ...ster If the device has multiple parameters other parameters operate in this way The same the general temperature humidity have this parameter the light generally does not have this item 2 Change correction value For example the current state quantity is too small we want to add 1 to its true value and the current value plus 100 correction operation command is 01 06 00 6B 00 64 F9 FD Device ID Func...

Page 6: ...SM6901B User Manual http www sonbus com ShanghaiSonbest Industrial Co Ltd Page6 ...

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