Industrial grade high-precision temperature and humidity signal conversion to RS485 and Modbus RTU acquisition module WJ801

Product features:

● Supports reading temperature and humidity using Modbus RTU protocol

●Typical relative humidity accuracy ± 3% RH

●Relative humidity measurement range: 0~100% RH

●Typical temperature accuracy ± 0.3 ℃

●Temperature measurement range -40~+85 ℃

●Wide power supply range: 5~30VDC

●High reliability, easy programming, and easy application

● Users can program module addresses, baud rates, etc

● Supports screw installation and DIN35 rail installation

● Dimensions: 70mmx45mmx30mm

Typical applications:

●Smart Factory

● Agricultural greenhouse

●Cold chain warehousing

● Weather Station Diagram 1 WJ801 Module Appearance

● Hospital

● High end residential properties

Product Overview:

The WJ801 product realizes the collection of humidity and temperature signals, and supports accessing temperature and humidity data through Modbus RTU protocol.

The WJ801 product can be applied to the smart factory MES system, agricultural greenhouse temperature and humidity collection, smart warehouse temperature and humidity monitoring, and small weather station data reporting,

Real time monitoring of hospital environment, comfort testing of high-end residential buildings, and so on.

The product includes a high-precision temperature and humidity sensor and a high-performance MCU main control chip. Each serial port can connect up to 255 WJ801 series modules

Block, communication method adopts MODBUSRTU communication protocol, baud rate can be set by communication, and can be hung on the same RS-485 bus with control modules from other manufacturers

Online, convenient for computer programming.

The WJ801 series products are designed and manufactured according to industrial standards, with strong anti-interference ability and high reliability. The working temperature range is -40 ℃ to+85 ℃.

Function Introduction:

The WJ801 remote I/O module can be used to measure humidity and temperature.

1. Signal input

Humidity and temperature.

2. Communication Protocol

Communication interface: 1 standard RS-485 communication interface.

Communication protocol: MODBUS RTU communication protocol.

Data format: 10 digits. 1 start bit, 8 data bits, and 1 stop bit. No verification.

The communication address (0-255) and baud rate (2400, 4800, 9600, 19200, 38400, 57600, 115200bps) can be set; communication

The longest distance of the network can reach 1200 meters, connected through twisted pair shielded cables.

High anti-interference design of communication interface, ± 15KV ESD protection, communication response time less than 100mS

3. Anti interference

Parity check can be set as needed. There is a transient suppression diode inside the module, which can effectively suppress various surge pulses, protect the module, and

Digital filtering can also effectively suppress power frequency interference from the power grid

WJ801 General Parameters:

Typical relative humidity accuracy: ± 3% RH

Relative humidity measurement range: 0~100% RH

Typical temperature accuracy: ± 0.3 ℃

Temperature measurement range: -40~+85 ℃

Communication: MODBUSRTU communication protocol

Baud rates (2400, 4800, 9600, 19200, 38400, 57600, 115200bps) can be selected by software

The address (0-255) can be selected by software

Communication response time: 100ms maximum

Working power supply:+5~30VDC wide power supply range, with anti reverse and overvoltage protection circuits inside

Power consumption: less than 1W

Working temperature: -40~+85 ℃

Working humidity: 0~100%

Storage temperature: -40~+85 ℃

Storage humidity: 0~100%

Dimensions: 70mm x 45mm x 30mm

Product manual：https://www.wayjun.cn/d/en.html