RS-WS-N01-8 Modbus Temperature and Humidity sensor

RS485 modbus rtu temperature and humidity sensor - Renke

RS-WS-N01-8 temperature and humidity sensor is a smart hygrometer and thermometer. The housing of the modbus temperature humidity sensor is made of abs plastic with vents, and there is a slot on the back, which can be directly installed on the rail. There are four wiring terminals at the lower end of the temperature and humidity sensor, which are connected to the power line and the 485 lines respectively. RS-WS-N01-8 RS485 temperature sensor adopts standard Modbus-RTU communication protocol, supports Kingview, 3D force control, MCGS Kunlun configuration software configuration screen, PLC, user-developed platform.

PRICE: $12

Modbus RTU temperature and humidity sensor description:

1. The sensor adopts an integrated design with a built-in temperature and humidity measuring element, and the overall appearance is small and exquisite, which is suitable for installation in a small place to measure temperature and humidity.

2. The Modbus RTU temperature humidity sensor has pluggable wiring terminals, easy to install, and easy to maintain during use.

3. High-quality measurement unit imported from Switzerland, accurate measurement.

4. 10~30V wide voltage range power supply, complete specifications.

RS485 modbus temperature humidity sensor specifications:

Power supply (default): 10-30V DC

Power consumption: 0.3W

A precision

Humidity: ±2%RH (5%~95%RH, 25℃), temperature: ±0.4℃ (25℃)

B quasi-accuracy

(Default) Humidity: ±3%RH (5%RH~95%RH, 25°C), temperature: ±0.5°C (25°C)

Transmitter circuit working temperature: -40℃~+60℃, 0%RH~80%RH

Communication protocol: Modbus-RTU communication protocol

Output signal: 485 signal

Temperature display resolution: 0.1℃

Humidity display resolution: 0.1%RH

Temperature and humidity refresh time: 1S

Long-term stability: temperature ≤0.1℃/y humidity ≤1%RH/y

Response time: Temperature ≤15s (1m/s wind speed) Humidity ≤4s (1m/s wind speed)

Parameter setting: through software setting

RS485 temperature and humidity sensor.jpg

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RS-WS-*-SMG-* LCD industrial temperature humidity sensor

RS-WS-N01-2C-* temperature humidity sensor with display

RS-WS-*-5 EE shell temperature humidity sensor

RS-WS-*-1-* temperature humidity sensor with 86 size

RS-WS-*-9TH duct temperature humidity sensor

RS-WS-*-SMG-* duct temperature humidity sensor with display

RS-WS-*-K1 temperature and humidity display panel

The communication protocol of the RS485 temperature humidity sensor:

1. Basic communication parameters:

Code8-bit binary
Data bit8-bit
Parity bitno
Stop bit1 bit
Error checkingCRC (Redundant Cyclic Code)
Baud rate2400bit/s, 4800bit/s, 9600 bit/s can be set, the factory default is 4800bit/s

2. Data frame format definition

Using Modbus-RTU communication protocol, the format is as follows:

Initial structure ≥ 4 bytes of time

Address code = 1 byte

Function code = 1 byte

Data area = N bytes

Error check = 16-bit CRC code

Time to end structure ≥ 4 bytes

Address code: the address of the transmitter, which is unique in the communication network (factory default 0x01).

Function code: The command function instruction issued by the host, this transmitter only uses function code 0x03 (read register data).

Data area: The data area is the specific communication data, pay attention to the high byte of the 16bits data first!

CRC code: two-byte check code.

Host query frame structure:

address codefunction codeRegister start addressRegister lengthCheck code low bitThe high bit of check code
1 byte1 byte2 bytes2 bytes1 byte1 byte

Slave machine response frame structure:

address codefunction codeNumber of valid bytesData areaSecond data areaNth data areaCheck code
1 byte1 byte1 byte2 bytes2 bytes2 bytes2 bytes

3. Register address

Register addressPLC or configuration addressContentOperating
0000 H40001HumidityRead-only
0001 H40002TemperatureRead-only

4. Communication protocol example and explanation

Example: Read the temperature and humidity value of the device address 0x01

Inquiry frame (hexadecimal):

Address codeFunction codeStarting addressData lengthCheck code low bitThe high bit of check code
0x010x030x00 0x000x00 0x020xC40x0B

Response frame (hexadecimal): (for example, the temperature is -10.1℃ and the humidity is 65.8%RH)

Address codeFunction codeReturns the number of valid bytesHumidity valueTemperature valueCheck code low bitThe high bit of check code
0x010x030x040x02 0x920xFF 0x9B0x5A0x3D

Temperature calculation:

When the temperature is lower than 0 ℃, the temperature data will be uploaded in the form of complement code.

Temperature: FF9B H (hexadecimal) = -101 => temperature = -10.1℃

Humidity calculation:

Humidity: 292 H (hexadecimal) = 658 => Humidity = 65.8%RH

RS485 modbus rtu temp and humidity sensor application:

RS485 Modbus RTU temperature and humidity sensor is a card rail type 485 output temperature and humidity transmitter are widely used in communication rooms, warehouse buildings, and automatic control, and other places that require temperature and humidity monitoring. The input power of the sensor, the temperature measurement unit, and the signal output is completely isolated. It is safe and reliable, beautiful in appearance, and easy to install. 485 communication interface standard Modbus-RTU communication protocol, communication address, and baud rate can be set, the communication distance is up to 2000 meters.

1.Temperature And Humidity Sensor Definition, Calibration, And Top10 Best Choose


Q: Where to download the rs485 modbus temperature humidity sensor manual?

A: To protect the patented technical parameters, please contact us for a manual.

Q: Do you support after-sales service?

A: Support, our products provide a two-year warranty, and there are dedicated technical personnel who can solve various technical problems for you through online contact.

Q: The reason why the modbus temperature sensor cannot connect to the PLC or computer?

A: 1. The computer has multiple COM ports, and the selected port is incorrect.

2. The device address is wrong, or there are devices with duplicate addresses (the factory default is all 1).

3. The baud rate, check method, data bit and stop bit are wrong.

4. The host polling interval and waiting response time are too short, and both need to be set above 200ms.

5. The 485 bus is disconnected, or the A and B wires are connected reversely.

6. If the number of equipment is too much or the wiring is too long, the power supply should be nearby, add 485 boosters, and add 120Ω terminal resistance at the same time.

7. The USB to 485 drivers is not installed or damaged.

8. The equipment is damaged.

Q: Do you have this modbus temperature sensor video?

A: Yes, please check our temperature and humidity sensor video.

Contact us for the best price and product manuals

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