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PC Based Industrial Automation

Featured Product

This months featured product is the ADAM-4520 RS-232 to RS-485 converter.
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ADAM-4021 Single Channel Analog Output Module

Download PDF Download the ADAM-4021 data sheet.


ADAM-4021 ModuleThe Analog output module receives its digital input through an RS-485 interface from the host computer. The format of the data is either engineering units, twos complement hexadecimal format or percentage of full-scale range (FSR),depending on the module ’s configuration. It then uses its microprocessor-controlled D/A converter to convert the digital data into output signals. You get a true readback of the analog output signal from the unit ’s ADC, which independently monitors the output. You can specify slew rates and start up currents through the configuration software. The Analog Output Module can supply single-channel analog output in a range of voltages or currents. They protect your equipment from ground loops and power surges by providing opto-isolation of the D/A output. The transformer based isolation is up to 3000 VDC.



  • Power Input Unregulated 10 - 30V DC.
  • Connectors 1 x plug-in terminal block (#14 - 22AWG)
  • Watchdog Timer System (1.6 Sec.)
  • Isolation Voltage 3000VDC
  • Power Consumption 1.4W @ 24 VDC
  • Supported Protocols ASCII command
  • Humidity 5 to 95% RH
  • Operating Temperature -10 to 70°C
  • Storage Temperature -25 to 85°C

Analog Output

  • Channels 1
  • Resolution 12-bit
  • Output Impedance 0.5Ω
  • Current Load Resistor 0 to 500Ω (source)
  • Output Type mA and V
  • Output Ranges
    • Voltage 0 to 10V
    • Current 0-20mA and 4-20mA
  • Programmable Output Slope 0.125-128mA/sec 0.0625-64V/sec
  • Readback Accuracy ±1% of FSR
  • Accuracy
    • Voltage Mode ± 0.2% or better
    • Current Mode ± 0.1% or better
    • Zero Drift voltage mode ±30µV/°C
    • Zero Drift current mode ±0.2µA/°C
    • Span Temperature Coefficient ±25ppm/°C