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SM2120B Us er Ma nual
SM2120B
RS485 interface pH sensor
User Manual
File Version: V21.3.24
SM2120B using the standard RS485 bus MODBUS-RTU protocol,easy access to PLC，DCS and
other instruments or systems for monitoring soil pH state quantities.The internal use of high -precision
sensing core and related devices to ensure high reliability an d excellent long-term stability,can be
customized RS232,RS485,CAN,4-20mA,DC0~5V\10V,ZIGBEE,Lora,WIFI,GPRS and other output
methods.
best Industrial Co., Ltd
Page1
Sha nghai Son
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Summary of Contents for SONBEST SM2120B
- Page 1 User Manual File Version: V21.3.24 SM2120B using the standard RS485 bus MODBUS-RTU protocol,easy access to PLC，DCS and other instruments or systems for monitoring soil pH state quantities.The internal use of high -precision sensing core and related devices to ensure high reliability an d 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 SM2120B Us er Ma nual Technical Parameters Technical parameter Parameter value Brand SONBEST PH range ±1 PH 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 Wiring instructions Any incorrect wiring can cause irreversible damage to the product.
- Page 3 SM2120B Us er Ma nual 40103 00 66 Device ID read/write 1~249 40104 00 67 baud rate read/write 40105 00 68 mode read/write 40106 00 69 protocol read/write 1~10 3 read and modify 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.
- Page 4 SM2120B Us er Ma nual coded according to baud rate, 03 is 9600, ie the current device has a baud rate of 9600. (2)Change the baud rate For example, changing the baud rate 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 .
- Page 5 SM2120B Us er Ma nual Contact Us Company: Shanghai Sonbest Industrial Co., Ltd Address:Building 8,No.215 North east road,Baoshan District,Shanghai,China Web: http://www.sonbest.com Web: http://www.sonbus.com SKYPE: soobuu Email: sale@sonbest.com Tel: 86-021-51083595 / 66862055 / 66862075 / 66861077 best Industrial Co., Ltd...
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