4-20ma to RS485 Converter

 Analog Current signal to RS485 or RS232 Converter/Analog data acquisition module.Slim-line plastic housing with integral 35mm DIN rail mounting , power supply(8-32VDC)

 Products selection guide:

Products List Samples:
WJ21-A4-485 (4-20ma input signal, output is rs485 interface)
WJ21-A3-232 (0-20ma input signal,output is rs232 interface)
WJ21-A7-485(0-±20mA input,output is rs485 interface)
WJ21-A4-232 (4-20ma input signal, output is rs232 interface)
Other types,please check our datasheet.

Features:                                                                    
● Analog signal acquisition,isolated RS-485/232 output
● 12-bit AD converter,testing accuracy>0.1%
● Can be remotely reconfigured for modules accuracy 
● Three-port isolation(input/output/assistant power supply): 3000VDC 
● Power supply:8~32VDC
● High reliability,easy programme,installation. 
● Can programme setting module address,baud rate
● 0-5V/0-10V/0-12V voltage signal or 4-20mA/0-20mA current signal input 
● Support Modbus RTU
● DIN35 Rail-mounted
● Dimension:106.7x79.0x25.0mm
Application:
●Signal testing/monitoring/cintrol
●RS-232/485 industrial automation control system
●Industial field signal isolation
●Process Monitoring & Control
●Test sensors signal
●Laboratory Data Acquisition
●Medical machine monitoring

●4-20mA/0-5V signal acquisition 

General parameters:

 (typical @ +25 deg.C, Vs to 24VDC)

 Input type: Input current / voltage input

 Accuracy: 0.1%

 Temperature drift:± 30 ppm / ℃ (± 50 ppm / ℃, maximum)

 Input Resistance: 50ÃŽ© (4-20mA/0-20mA/0- ± 20mA current input)

              100ÃŽ© (0-10mA/0- ± 10mA current input)

              1KÃŽ© (0-1mA/0- ± 1mA current input)

              >1MÃŽ©(voltage input)

Bandwidth:  -3 dB 10 Hz

Conversion rate: 10 Sps

Common Mode Rejection (CMR): 120 dB (1kohm Source Imbalance @ 50/60 Hz)

Normal Mode Rejection (NMR): 60 dB (1kohmSource Imbalance @ 50/60 Hz)

Input Protection: over-voltage protection, over-current protection

Communication: RS-485 protocol or RS-232 standard characters protocols and MODBUS RTU communication protocol

              Baud Rate (1200,2400,4800,9600,19200,38400 bps) can be selected via software

Address (0 to 255) can be selected via software

Communication Response Time: 100 ms maximum

Power Supply: +8 ~ 32VDC wide range power supply, internal anti-reverse and over-voltage protection circuit

Power Loss: less than 1W

Operating Temperature: - 45 ~ +80 deg.C

Humidity: 10 ~ 90% (no condensation)

Storage Temperature: - 45 ~ +80 deg.C

Storage Humidity: 10 ~ 95% (no condensation)

Isolation Voltage: input / output: 3KVDC, 1 minute, leakage current:1mA

              Which output signal and power supply are common ground.

Shock Voltage: 3KVAC, 1.2/50us (peak)

Dimensions: 106.7 mm x 79 mm x 25mm