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                SM2170B    Us er Ma nual                   

http://www.sonbus.com/ 

Sha nghai Son

best Industrial Co., Ltd                                                                             Page1

 

 

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 

Summary of Contents for SM2170B

Page 1: ...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 Paramete...

Page 2: ...the cable as follows in the case of power failure and then connect the cable to confirm the correctness and then use it again ID Core color Identification Note 1 Red V Power 2 Green V Power 3 Yellow A RS485 A 4 Blue B RS485 B In the case of broken wires wire the wires as shown in the figure If the product itself has no leads the core color is for reference Communication Protocol The product uses R...

Page 3: ...fy device address 1 Read or query device address If you don t know the current device address and there is only one device on the bus you can use the command FA 03 00 64 00 02 90 5F Query device address Device ID Function id Start Address Data Length CRC16 FA 03 00 64 00 02 90 5F FA is 250 for the general address When you don t know the address you can use 250 to get the real device address 00 64 ...

Page 4: ...from 9600 to 38400 ie changing the code from 3 to 5 the command is 01 06 00 67 00 05 F8 1601 03 00 66 00 01 64 15 Device ID Function id Start Address Target Baud Rate CRC16 01 03 00 66 00 01 64 15 Change the baud rate from 9600 to 38400 changing the code from 3 to 5 The new baud rate will take effect immediately at which point the device will lose its response and the baud rate of the device shoul...

Page 5: ...e effect immediately after successful change Disclaimer This document provides all information about the product does not grant any license to intellectual property does not express or imply and prohibits any other means of granting any intellectual property rights such as the statement of sales terms and conditions of this product other issues No liability is assumed Furthermore our company makes...

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