12-bit AD converter,Analog Current signal to RS485 or RS232 Converter

  • August 28, 2014
  • Shenzhen WAYJUN Industrial Automation
12-bit AD converter,Analog Current signal to RS485 or RS232 Converter
12-bit AD converter,Analog Current signal to RS485 or RS232 Converter


Product Overview:WAYJUN WJ21
WJ21 series products realize the signal acquisition between sensor and host, to measure analog signals. WJ21 products
can be applied to RS-232/485 bus industrial automation control system,4-20mA / 0-5V signal measurement, monitoring
and control,0-75mV ,0-100mV and other small-signal measurement and signal isolation and long-term industrial
transmission and so on.
Products include power supply isolation, signal isolation, linearization, A/D conversion and RS-485 serial
communication. Each serial interface can connect up to 255 pieces WJ21 Series modules, communication using ASCII
code or MODBUS RTU communication protocol, and its instruction set compatible with the ADAM modules, baud rate
can been set by the code, with other manufacturers control module hang in the same RS-485 bus for easy programming.
Product Selection:
WJ21 U(A) ‚ñ° – ‚ñ°
Input Voltage or Current Signal Interface
U1Ôºö0-5V A1Ôºö0-1mA 485Ôºö output is RS-485 interface
U2Ôºö0-10V A2Ôºö0-10mA 232Ôºö output is RS-232 interface
U3Ôºö0-75mV A3Ôºö0-20mA
U4Ôºö0-2.5V A4Ôºö4-20mA
U5Ôºö0-±5V A5Ôºö0-±1mA
U6Ôºö0-±10V A6Ôºö0-±10mA
U7Ôºö0-±100mV A7Ôºö0-±20mA
U8Ôºöuser-defined A8Ôºöuser-defined
Sample 1: part No.:WJ21 A4-485 4-20mA input signal,output is RS485 interface
Sample 1: part No.:WJ21 U1-232 0-5V input signal,output is RS232 interface
General parameters:
(typical @ +25 ‚ÑÉ, Vs to 24VDC)
Input type: Input current / voltage input
Accuracy: 0.1%
Temperature drift:± 30 ppm / ‚ÑÉ (± 50 ppm / ‚ÑÉ, maximum)
Input Resistance: 50Ω (4-20mA/0-20mA/0- ± 20mA current input)
100Ω (0-10mA/0- ± 10mA current input)
Signal Isolators & Conditioners
Shenzhen WAYJUN Industrial Automation E-mail: sales@wayjun.cn www.wayjun.net Page 3 of 11
1KΩ (0-1mA/0- ± 1mA current input)
>1MΩ(voltage input)
Bandwidth: -3 dB 10 Hz
Conversion rate: 10 Sps
Common Mode Rejection (CMR): 120 dB (1kΩ Source Imbalance @ 50/60 Hz)
Normal Mode Rejection (NMR): 60 dB (1kΩ Source 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 (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 ‚ÑÉ
Humidity: 10 ~ 90% (no condensation)
Storage Temperature: - 45 ~ +80 ‚ÑÉ
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

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