8-way NTC thermistor temperature conversion RS-485/232 Data acquisition module WJ226
Product features:
Eight NTC temperature acquisition channels, isolated conversion RS-485/232 output
Can be quickly customized and linearized based on the NTC scale
● Support various NTC sensors such as NTC 5K/10K/20K/100K
Using a 12 bit AD converter, the measurement accuracy is better than 0.1%
● Isolation and withstand voltage 1000VDC between signal inputs/outputs
Wide power supply range: 8~32VDC
High reliability, convenient programming, and easy application
Standard DIN35 rail installation for convenient centralized wiring
● User programmable module address, baud rate, etc
● Supports Modbus RTU communication protocol and automatic recognition protocol
Industrial flame-retardant housing, RS485 port surge protection
Typical applications:
NTC temperature signal measurement
RS-485 remote I/O, data collection
Intelligent building control, security engineering and other application systems
RS-232/485 bus industrial automation control system
Industrial site signal isolation and long-distance transmission
● Equipment operation monitoring
Measurement of sensor signals
● Acquisition and recording of industrial site data
Development of medical and industrial control products
● Thermistor signal acquisition
Product Overview:
The WJ226 product realizes signal acquisition between sensors and the host, used to detect the temperature signal of NTC thermistors. The WJ226 series products can be applied in
RS-232/485 bus industrial automation control system, NTC thermistor temperature signal measurement, industrial field signal isolation and long-distance transmission, etc.
The products include power isolation, signal isolation, linearization, A/D conversion, and RS-485 serial communication. Each serial port can connect up to 255 WJ226 series
The module adopts ASCII code communication protocol or MODBUS RTU communication protocol for communication, and the baud rate can be set by the code, which can communicate with control modules from other manufacturers
The blocks are hung on the same RS-485 bus for easy computer programming.
The WJ226 series products are intelligent monitoring and control systems based on microcontrollers, with all user set calibration values, addresses, baud rates, and data formats,
Parity check and other configuration information are stored in the non-volatile memory EEPROM.
The WJ226 series products are designed and manufactured according to industrial standards, with isolation between signal inputs/outputs, capable of withstanding 1000VDC isolation voltage, and anti-interference ability
Strong strength and high reliability. Working temperature range -40 ℃ to+85 ℃.
Function Introduction:
The WJ226 signal isolation acquisition module can be used to measure eight NTC thermistor signals.
1. Analog signal input
12 bit acquisition accuracy, 8-channel NTC thermistor signal input. All signal input ranges have been calibrated before the product leaves the factory. Users do not need to calibrate.
2. Communication protocol
Communication interface: 1 standard RS-485 communication interface or 1 standard RS-232 communication interface, specified when ordering and selecting.
Communication protocol: Supports two protocols, the character protocol defined by the command set and the MODBUS RTU communication protocol. The module automatically recognizes the communication protocol,
Can achieve network communication with multiple brands of PLC, RTU or computer monitoring systems.
Data format: 10 digits. 1-bit start bit, 8-bit data bit, 1-bit stop bit.
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 and is 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
Checksum can be set as needed. There are transient suppression diodes inside the module, which can effectively suppress various surge pulses and protect the module
Word filtering can also effectively suppress power frequency interference from the power grid.
Product manual：https://www.wayjun.cn/d/
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