8-Way 4-20mA to RS-485/RS232 Data Acquisition Module Signal Sensor

• Customization: Available
• Input Type: Current Input/Voltage Input
• Product Features: Eight Channel Analog Signal Acquisition
• Model NO.: WJ128
• Product Features1: High Reliability, Easy Programming, and Easy Appli
• Product Features2: Users Can Program Module Addresses, Baud Rates, Et
• Typical Applications: Signal Measurement, Monitoring, and Control
• Typical Applications1: RS-485 Remote I/O, Data Acquisition
• Typical Applications2: RS-232/485 Bus Industrial Automation Control Syste
• Wide Power Supply Range: 8~32VDC
• Advantage: Intelligent Building Control, Security Engineering
• Quantity: 99999
• Transport Package: Boxed
• 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

Product selection:	WJ128- U(A)
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

Global Showrooms

Factory Capabilities

WJ128 General Parameters:
 (Typical @+25 ℃, Vs is 24VDC)
 Input type: current input/voltage input
 Accuracy: 0.1%
 Temperature drift: ± 50 ppm/℃ (± 100 ppm/℃, maximum)
 Input resistance: 150 Ω (4-20mA/0-20mA/0- ± 20mA current input)
 300 Ω (0-10mA/0- ± 10mA current input)
 1.5K Ω (0-1mA/0- ± 1mA current input)
 Greater than 200K (5V/10V voltage input)
 Greater than 1M Ω (input voltage below 2.5V)
 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 may have
 deviations. 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 moderejection (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: RS-485 or 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 protection
 circuits
 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-232/RS-485 output and power supply are grounded together.
 Surge resistant voltage: 3KVAC, 1.2/50us (peak)
 Dimensions: 120mm x 70mm x 43mm

 Function Introduction:
 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

Certifications

FAQ

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