Ascii Code Communication Protocol or Modbus RTU Communication Protocol Signal Isolation Acquisition Module

• Customization: Available
• Conductive Type: Bipolar Integrated Circuit
• Input Type: Differential
• Model NO.: WJ128
• Integration: GSI
• Operating Temperature: -40℃ - 85℃
• Resolution: 12 Bit
• Shape: DIP
• Technics: Semiconductor IC
• Input Type1: Current Input/Voltage Input
• Accuracy: 0.1%
• Temperature Drift: ± 50 Ppm/ºC (± 100 Ppm/ºC
• Input Resistance: 150 Ω (4-20mA/0-20mA/0- ± 20mA Curren
• Bandwidth: -3 dB 10 Hz
• Conversion Rate: 10 Sps (Factory Default Value, Users Can Modify Th
• Power Consumption: Less Than 1W
• Working Temperature: -45~+80 ºC
• Storage Temperature: -45~+80 ºC
• Transport Package: Wayjunr
• Specification: 120mm x 70mm x 43mm
• Trademark: wayjunr
• Origin: Guangdong, China
• Production Capacity: 9999

Product Description

 8-way 4-20mAto RS-485/232, data acquisition module WJ128

 Product features:
 Eight channel analog signal acquisition, isolated conversion to RS-485/232 output
 Using a 12 bitAD converter, the measurement accuracy is better than 0.1%
 The precision of the calibration module can be programmed through the RS-485/232 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 ADconversion rate can be programmed and set
 Typical applications:
 Signal measurement, monitoring, and control
 RS-485 remote I/O, data acquisition
 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 field data
Development of medical and industrial control products
 4-20mAor 0-5V signal acquisition

Product selection	WJ128
	Input voltage or current signal value communication interface
U1:0-5V  A1:0-1mA  U2: 0-10V  U4:0-2.5V  U5:0-±5V  U6:0-±10V  U8: User defined  A2: 0-10mA  A3:0-20mA  A4:4-20mA  A5:0-±1mA  A6:0-±10mA  A7:0-±20mA  A8: User defined	485: Output via RS-485 interface  232: Output via RS-232 interface	Selection example 1: Model: WJ128-A4-485 represents 8 channels of 4-20mA signal input, and the output is RS-485  interface  Selection Example 2: Model: WJ128-U1-232 indicates 8-channel 0-5V signal input and output via RS-232 interface  Selection Example 3: Model: WJ128-U2-485 represents 8 channels of 0-10V signal input, and the output is RS-485  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

 Product Overview:

 Function Introduction:

 WJ128
 The WJ128 product implements signal acquisition between sensors and hosts for detecting analog signals. The
 WJ128 series products can be applied to industrial automation control systems with RS-232/485 bus, 4-20mA/0-5V
 signal measurement and monitoring, 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 serial
 communication. Each serial port can connect up to 255 WJ128 series modules, and the communication method adopts
 ASCII code communication protocol or MODBUS RTU communication protocol. The baud rate can be set by code and
 can be hung on the same RS-485 bus as control modules from other manufacturers, making it easy for computer
 programming The WJ128 series products are intelligent monitoring and control systems based on microcontrollers. All user set
 calibration values, addresses, baud rates, data formats, checksum statuses, and other configuration information are stored
 in non-volatile memory EEPROM.
 The WJ128 series products are designed and manufactured according to industrial standards, with isolation between
 signal inputs/outputs, capable of withstanding 1000VDC isolation voltage, strong anti-interference ability, and high
 reliability. The working temperature range is-45 ℃ to+85 ℃.

 The WJ128 signal isolation acquisition module can be used to measure eight voltage or current signals.
 1,Analog signal input
 12 bit acquisition accuracy, 8 analog signal inputs. All signal input ranges have been calibrated before the product
 leaves the factory. During use, users can also easily program and calibrate themselves. Please refer to the product
 selection for specific current or voltage input range.
 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, the character protocol defined by the command set and the
 MODBUSRTUcommunication protocol. The module automatically recognizes communication
 protocols and can achieve network communication with various brands of PLCs, RTUs, or computer
 monitoring systems.
 Data format: 10 digits. 1 start bit, 8 data bits, and 1 stop bit.
 The communication address (0-255) and baud rate (2400, 4800, 9600, 19200, 38400, 57600, 115200bps) can be set;
 The communication network can reach a maximum distance of 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
 Checksums 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 the internal digital filter can also effectively suppress power
 frequency interference from the power grid

FAQ

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