PT100/PT1000 to RS-485/RS232 Thermal Resistance Temperature Modbus Data Acquisition Module

• Customization: Available
• Conductive Type: Bipolar Integrated Circuit
• Input Type: Differential
• Model NO.: WJ225
• Integration: GSI
• Operating Temperature: -40℃ - 85℃
• Resolution: 12 Bit
• Shape: DIP
• Technics: Semiconductor IC
• Product Features: PT100/PT1000 Thermal Resistance Isolation Conversi
• Product Features1: Standard 3-Wire Measurement Method with Automatic
• Product Features2: Using a 12 Bit Ad Converter, The Measurement Accur
• Product Features3: The Accuracy of The Calibration Module Can Be Prog
• Product Features4: Isolation Withstand Voltage Between Signal Input/
• Wide Power Supply Range: 8~32VDC
• Product Features5: High Reliability, Easy Programming, and Easy Appli
• Typical Applications: PT100 Temperature Signal Measurement
• Typical Applications1: RS485 Bus Industrial Automation Control System
• Transport Package: Wayjunr
• Specification: 120mm x 70mm x 43mm
• Trademark: wayjunr
• Origin: Guangdong, China
• Production Capacity: 9999

Product Description

8-channel Pt100/Pt1000 to RS-485/232, thermal resistance temperature Modbusdataacquisition module WJ225

Product features:
Pt100/Pt1000 thermal resistance isolation conversion RS-485 output
Standard 3-wire measurement method with automatic long line compensation
Using a 12 bit AD converter, the measurement accuracy is better than 0.1%
The accuracy of the calibration module can be programmed through the RS-485 interface
Isolation withstand voltage between signal input/output 1000VDC
Wide power supply range: 8~32VDC
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
The AD conversion rate can be programmed and set
Typical applications:
Pt100 temperature signal measurement
RS-485 remote I/O, data acquisition
Intelligent building control, security engineering and other application systems
RS485 bus industrial automation control system diagram 1 WJ225 module appearancediagram

Industrial site signal isolation and long-distance transmission
 Equipment operation monitoring
Measurement of sensor signals
 Acquisition and recording of industrial field data
Development of medical and industrial control products

Specification

Product selection: WJ225 - Z Selection example 1: Model: WJ225- Z1-485 indicates input: Pt100, temperature range: -200~600 ℃, output is RS-485interface
Selection Example 2: Model: WJ225- Z5-485 Input: Pt1000, Temperature Range: -200~600 ℃, Output: RS-485Input type: Z communication interface Z1: PT100 485: Output as RS-485 interface Z5: Pt1000 232: Output as RS-232 interface

Company Profile

Shenzhen Weijunrui Technology Co., Ltd

Since: 2011
Specialty: The company's main products include analog acquisition modules, signal isolators/conversion modules, and signal transmitters
Capacity: Produce 10000 per month
Advanced Features:
Switching to TCP/network/remote IO module, Modbus RTU to TCP, RS232/485 to Ethernet, analog signal (current/voltage/thermistor/frequency/displacement/speed/pulse) isolation transmitter, mV differential signal amplifier, isolation amplifier, micro power DC-DC module power supply, etc

WJ225 General Parameters:

Product Overview:

(Typical @+25 ℃, Vs is 24VDC)
Input type: Pt100 input/Pt1000 input
Measurement temperature range: -200~600 ℃
Accuracy: 0.1%
Temperature drift: ± 50 ppm/℃ (± 100 ppm/℃, maximum)
Bandwidth: -3 dB 10 Hz
Conversion rate: 10 Sps (factory default value, users can modify the conversion rate by issuing commands.)
You can set the AD conversion rate to 2.5 SPS, 5 SPS, 10 SPS, and 20 SPS by sending commands. (Channel
conversion rate=AD conversion rate/number of open channels)
Note: Please recalibrate the module after modifying the conversion rate, otherwise the measured data mayhavedeviations. You can also specify the conversion rate when placing an order, and we will
recalibrate the product according to the conversion rate you require when it leaves the factory. Common mode rejection (CMR): 120 dB (1k Ω Source Imbalance @ 50/60 Hz)
Normal mode suppression (NMR): 60 dB (1k Ω Source Imbalance @ 50/60 Hz)
Input protection: overvoltage protection, overcurrent protection
Communication: Protocol RS-485/RS-232 standard character protocol and MODBUS RTU 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: 100 ms maximum
Working power supply:+8~32VDC wide power supply range, with internal anti reverse and overvoltage protectioncircuits
Power consumption: less than 1W
Working temperature: -45~+80 ℃
Working humidity: 10~90% (no condensation)
Storage temperature: -45~+80 ℃
Storage humidity: 10~95% (no condensation)
Isolation withstand voltage: 1KVDC between input/output, 1 minute, leakage current 1mA
The RS-485 output and power supply are grounded together. Surge resistant voltage: 1KVAC, 1.2/50us (peak value)
Dimensions: 120mm x 70mm x 43mm

The WJ225 product implements multi-channel signal acquisition between sensors and hosts to detect temperaturesignals. The WJ225 series products can be applied in RS-485 bus industrial automation control systems, temperaturesignal measurement, monitoring, and control, etc. The product includes power isolation, signal isolation, linearization, A/D conversion, and RS-485 serial
communication. Each serial port can connect up to 255 W1J25 series modules, and the communication methodadoptsASCII code communication protocol or MODBUS RTU communication protocol. The address and baud rate canbesetby code, and can be hung on the same RS-485 bus with control modules from other manufacturers for easy computerprogramming.

FAQ

Q: How to contact you?
A: Please contact us via email or online customer service