8-channel Pt100/Pt1000 to RS-485/232, thermal resistance temperature Modbus data acquisition module WJ225
Product features:
Pt100/Pt1000 thermistor isolation conversion RS-485 output
Standard 3-line measurement method with automatic long line compensation
Using a 12 bit AD converter, the measurement accuracy is better than 0.1%
The precision of the calibration module can be programmed through the RS-485 interface
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
The AD conversion rate can be programmed
Typical applications:
Pt100 temperature signal measurement
RS-485 remote I/O, data collection
Intelligent building control, security engineering and other application systems
RS485 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
Product Overview:
The WJ225 product implements multi-channel signal acquisition between sensors and the host to detect temperature signals. WJ225 series products can be applied to RS-485
Bus industrial automation control system, temperature signal measurement, monitoring and control, 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 W1J25 series
Module, communication mode adopts ASCII code communication protocol or MODBUS RTU communication protocol, address and baud rate can be set by code, and can communicate with other manufacturers
The control module is mounted on the same RS-485 bus for easy computer programming.
The WJ225 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 WJ225 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 -45 ℃ to+85 ℃.
Function Introduction:
The WJ225 signal isolation acquisition module can be used to measure 8 temperature signals.
1. Temperature signal input
12 bit acquisition accuracy, 8 temperature signal inputs. Measure temperature range -200~600 degrees. All products have been calibrated before leaving the factory. When in use, the user
It can also be easily self programmed and calibrated.
2. Communication protocol
Communication interface: 1 standard RS-485 or RS-232 communication interface.
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 network
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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