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                SM1882B    Us er Ma nual                   

http://www.sonbus.com/ 

Sha nghai Son

best Industrial Co., Ltd                                                                             Page1

 

 

SM1882B 

RS485 interface rail installed atmospheric pressure sensor 

User Manual   

 

File Version: V21.3.24

   

        SM1882B using the standard    RS485 bus MODBUS-RTU protocol,easy access to PLC

DCS and 

other instruments or systems for monitoring atmospheric pressure state quantities.The internal use of 

high-precision sensing core and related devices to ensure high r eliability 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 SM1882B

Page 1: ...us MODBUS RTU protocol easy access to PLC DCS and other instruments or systems for monitoring atmospheric pressure 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...

Page 2: ...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 RS485 MODBUS RTU standard protocol format all operation or reply commands are hexadecimal...

Page 3: ... 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 is the device model register For the correct query command the device will respond for example the response data is 01 03 02 07 12 3A 79 the format of which is as shown in the following table Device ID Function id Start Address Model Code CRC1...

Page 4: ... point the device will lose its response and the baud rate of the device should be queried accordingly Modified 5 Read Correction Value 1 Read Correction Value When there is an error between the data and the reference standard we can reduce the display error by adjusting the correction value The correction difference can be modified to be plus or minus 1000 t hat is the value range is 0 1000 or 64...

Page 5: ...s 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 no warranties express or implied regarding the sale and use of this product including the suitability for the specific use of the product the marketability or the infringement lia...

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