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SM2170B Us er Ma nual
SM2170B
RS485 interface infrared carbon dioxide sensor
User Manual
File Version: V21.3.24
SM2170B using the standard RS485 bus MODBUS-RTU protocol,easy access to PLC，DCS and
other instruments or systems for monitoring carbon dioxide state quantities.The internal use of
high-precision sensing core and related devices to ensure high reliability and excellent long-term
stability,can be customized RS232,RS485,CAN,4-20mA,DC0~5V\10V,ZIGBEE,Lora,WIFI,GPRS and
other output methods.
Technical Parameters
Technical parameter
Parameter value
best Industrial Co., Ltd
Page1
Sha nghai Son
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Summary of Contents for SONBEST SM2170B
- Page 1 User Manual File Version: V21.3.24 SM2170B using the standard RS485 bus MODBUS-RTU protocol,easy access to PLC，DCS and other instruments or systems for monitoring carbon dioxide state quantities.The internal use of high-precision sensing core and related devices to ensure high reliability and excellent long-term stability,can be customized RS232,RS485,CAN,4-20mA,DC0~5V\10V,ZIGBEE,Lora,WIFI,GPRS and other output methods.
- Page 2 SM2170B Us er Ma nual Brand SONBEST CO2 range 0~5000ppm ±100ppm CO2 accuracy Communication Interface RS485 Default baud rate 9600 8 n 1 Power DC9~24V 1A Running temperature -40~80° C Working humidity 5%RH~90%RH Product Size Wiring instructions Any incorrect wiring can cause irreversible damage to the product. Please carefully wire the cable as follows in the case of power failure, and then connect the cable to confirm the correctness and then use it again.
- Page 3 SM2170B Us er Ma nual 1. Read Data (Function id 0x03) Inquiry frame (hexadecimal), sending example: Query 1# device 1 data, the host computer sends the command:01 03 00 00 00 01 84 0A . Device ID Function id...
- Page 4 SM2170B Us er Ma nual Device ID Function id Start Address Destination CRC16 00 66 00 02 E8 27 Response should be in the data, after the modification is successful, the first 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.
- Page 5 SM2170B Us er Ma nual In the response data, the first byte 01 indicates the real address of the current device, and 00 6B is the first state quantity correction value register. If the device has multiple parameters, other parameters operate in this way.
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