8-channel thermocouple temperature signal conversion to RS-485/RS-232, Modbus data acquisition module WJ227
Product Features:
Eight channel thermocouple signal acquisition isolation conversion RS-485/232 output
Using a 16 bit AD converter, the measurement accuracy is better than 0.1%
Isolation withstand voltage between signal input/output 1000VDC
Wide power supply range: 8~32VDC
K/J/T/E/R/S/B/N type thermocouple input
High reliability, easy programming, and easy application
Standard DIN35 rail installation, convenient for centralized wiring
Users can program module addresses, baud rates, etc
Supports Modbus RTU communication protocol and automatic recognition protocol
Industrial flame retardant shell, RS485 port surge protection
Low cost, small volume modular design
Typical Applications:
Temperature signal measurement, monitoring, and control
RS-485/232 remote I/O, data acquisition
Intelligent building control, security engineering and other application systems
RS-485/232 Bus Industrial Automation Control System
Industrial site signal isolation and long-distance transmission
Equipment operation monitoring
WJ227 module appearance diagram
Measurement of sensor signals
Acquisition and recording of industrial field data
Development of medical and industrial control products
Various types of thermocouple signal acquisition
Product Overview:
The WJ227 product implements signal acquisition between sensors and hosts for detecting analog signals. WJ227 series products can be applied to RS-485/232
Bus industrial automation control system, measurement of K/J/T/E/R/S/B/N thermocouple signals, as well as industrial field signal isolation and long-distance transmission, etc.
The product includes power isolation, signal isolation, linearization, A/D conversion, and RS-485/232 serial communication. Each serial port can connect up to 255 WJ227 devices
Series module, communication method adopts ASCII code communication protocol or MODBUS RTU communication protocol, address and baud rate can be set by code, and can communicate with other factories
The control module of the home is hung on the same RS-485 bus for easy computer programming.The WJ227 series products are intelligent monitoring and control systems based on microcontrollers, with all user set calibration values, addresses, baud rates, and data formats,
The parity check and other configuration information are stored in non-volatile memory EEPROM.
The WJ227 series products are designed and manufactured according to industrial standards, with isolation between signal inputs/outputs. They can withstand an isolation voltage of 1000VDC and have anti-interference capabilities
Strong power and high reliability. The working temperature range is -45 ℃ to+85 ℃.
Function Introduction:
The WJ227 signal isolation acquisition module can be used to measure 8 temperature signals.
1. Temperature signal input
16 bit acquisition accuracy, 8-channel thermocouple temperature signal input. All signal input ranges have been calibrated before the product leaves the factory. During use, users can also
Easy self programming calibration.
2. Communication Protocol
Communication interface: 1 standard RS-485 communication interface or 1 standard RS-232 communication interface, please specify when ordering and selecting.
Communication Protocol: Supports two protocols, Command Set Defined Character Protocol and MODBUS
RTU communication protocol. The module automatically recognizes the communication protocol,
Can be real
We currently communicate with various brands of PLCs, RTUs, or computer monitoring systems through network communication.
Data format: 10 digits. 1 start bit, 8 data bits, 1 stop bit, no checksum.
The communication address (0-255) and baud rate (2400, 4800, 9600, 19200, 38400, 57600, 115200bps) can be set; Communication Network
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 regulate the internal parameters
Word filtering can also effectively suppress power frequency interference from the power grid.
Product selection:
WJ227
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communication interface
485: Output as RS-485 interface
232: Output as RS-232 interface
Selection Example 1: Model: WJ227-485
Indicating 8 thermocouple signal inputs and outputs via RS-485 interface
Selection Example 2: Model: WJ227-232
Indicating 8 thermocouple signal inputs and outputs via RS-232 interface
Product manual：https://www.wayjun.cn/d/
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