SONBEST SM6365B Noise Sensor User Manual

Introduction

The SONBEST SM6365B is a noise sensor that utilizes the standard RS485 bus MODBUS-RTU protocol. This allows for easy integration with PLC, DCS, and other industrial instruments or systems for monitoring noise state quantities. The device features an internal high-precision sensing core and related components, ensuring high reliability and excellent long-term stability. It supports various customized output methods including RS232, RS485, CAN, 4-20mA, DC0~5V/10V, ZIGBEE, Lora, WIFI, and GPRS.

Image Description: The SM6365B sensor is depicted as a white, multi-layered dome-shaped unit mounted on three metal legs. It is designed for environmental monitoring applications.

Technical Parameters

Product Dimensions

Main Unit Dimensions: Height: 67mm, Diameter: 140mm.

Mounting Bracket Part A: Features holes with a diameter of ⌀8mm and mounting slots.

Mounting Bracket Part B: Features holes with a diameter of ⌀3mm and mounting slots.

Additional overall dimensions indicated in diagrams include 180mm, 146mm, and 90mm, relating to mounting configurations.

Wiring

RS485 Wiring

Wire Connections:

• RD: PWR+
• GN: PWR-
• YE: RS485 A+
• BU: RS485 B-

4~20mA Wiring

Wire Connections:

• RD: PWR+
• BK: PWR-
• BU: I OUT

Diagram Description (4~20mA): A power supply (DC12~24V) is connected in series with an Ammeter and the SM6365B sensor. The connections are: RD to PWR+, BK to PWR-, and BU to I OUT.

0~5V/10V Wiring

Wire Connections:

• RD: PWR+
• BK: PWR-
• BU: V OUT

Diagram Description (0~5V/10V): A power supply (DC12~24V) is connected in parallel with a Voltmeter and the SM6365B sensor. The connections are: RD to PWR+, BK to PWR-, and BU to V OUT.

Wiring Note

❗ Note: When wiring, connect the positive and negative poles of the power supply first, then connect the signal wire.

Application Solution

RS485 Wiring Example

Diagram Description: Illustrates a typical RS485 setup where a Computer communicates with the SM6365B sensor. Data transmission occurs via an RS485 Converter, potentially using wireless technology (indicated by a Wi-Fi symbol).

Communication Protocol

The SM6365B product uses the RS485 MODBUS-RTU standard protocol format. All operation and reply commands are hexadecimal data. The default device address is 1 when the device is shipped, and the default baud rate is 9600, 8, n, 1.

1. Read Data (Function ID 0x03)

Inquiry Frame Example (hexadecimal): Query 1# device 1 data. The host computer sends the command:

01 03 00 00 00 01 84 0A

Response Frame Example: For a correct query, the device will respond with data:

01 03 02 00 79 79 A6

Response Format Parsing:

Data Description: Data in the command is hexadecimal. For example, Data 1 (00 79) converted to decimal is 121. If the data magnification is 100, the actual value is 121/100 = 1.21.

2. Data Address Table

Device Address Management

1. Read or Query Device Address

If the current device address is unknown and there is only one device on the bus, you can use the general address FA (250) to query. Example command:

FA 03 00 64 00 02 90 5F

Here, 00 64 is the device model register.

Response Example:

The first byte of the response data (01) indicates the real address of the current device. The model code (55 3C) converted to decimal is 20182, indicating the main model is 21820. The last two bytes (00 01) indicate a status quantity.

2. Change Device Address

To change the device address, for example, from 1 to 02:

Command Example:

01 06 00 66 00 02 E8 14

Successful Change Response Example:

The first byte of the response data indicates the new device address. The change takes effect immediately. The query command in the software needs to be updated accordingly.

Baud Rate Management

1. Read Baud Rate

The default factory baud rate is 9600. To change it, refer to the following table and protocol.

Baud Rate Encoding:

• 1: 2400
• 2: 4800
• 3: 9600
• 4: 19200
• 5: 38400
• 6: 115200

Read Baud Rate Command Example:

01 03 00 67 00 01 35 D5

Response Example:

The Rate ID (00 03) indicates the baud rate is 9600.

2. Change Baud Rate

To change the baud rate, for example, from 9600 (code 3) to 38400 (code 5):

Command Example:

01 06 00 67 00 05 F8 16

The new baud rate takes effect immediately. The device may lose its response, and the baud rate should be queried accordingly.

Correction Value Management

1. Read Correction Value

When there is an error between the data and the reference standard, the display error can be reduced by adjusting the correction value. The correction difference can be modified to be plus or minus 1000. The value range is 0-1000 or 64535-65535.

Read Correction Value Command Example:

01 03 00 6B 00 01 F5 D6

Response Example:

In the response data, 00 64 represents the correction value (hexadecimal 0x64 is decimal 100). The first byte (01) indicates the device address. This method applies to parameters like temperature and humidity.

2. Change Correction Value

To add a correction value, for example, adding 100:

Command Example:

01 06 00 6B 00 64 F9 FD

After the operation is successful, the parameters take effect immediately.

Disclaimer

This document provides all information about the product. It does not grant any license to intellectual property, nor does it express or imply any other means of granting intellectual property rights, such as sales terms and conditions. No liability is assumed. Furthermore, Shanghai Sonbest Industrial Co., Ltd makes no warranties, express or implied, regarding the sale and use of this product, including suitability for specific use, marketability, or infringement liability for any patent, copyright, or other intellectual property rights. Product specifications and descriptions may be modified at any time without notice.

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, http://www.sonbus.com

SKYPE: soobuu

Email: sale@sonbest.com

Tel: 86-021-51083595 / 66862055 / 66862075 / 66861077