Opto-isolated 4-20mA to Modbus and USB

  • Four opto-isolated analog inputs
  • 16 bit Sigma Delta converter
  • Additional USB port for direct connection to a computer

The ADI-524 is 4-20mA analog input interface converter to Modbus RTU over RS485 or over USB. It has 4 opto-isolated analogue inputs and RS485/USB output. Extra isolated 24V power supply for 4-20mA sensor/devices and DIP switch for baud-rate and address setting.
USB port make this device perfect to use with industrial computers and gateways with USB port.
It can be mounted on standard DIN rail or by using clamps.


  • Temperature sensors, laser distance sensors, other industrial sensors
  • Industry, infrastructure and energy and water supply systems


Technical specification

Input interface 4 x 4-20mA isolated inputs
Output interface Modbus RTU and Modbus RTU by inbuilt USB to serial converter
Baudrate 9600, and other
Modbus addreses 4 bit setting
Configuration By 6 way DIP switch. Serial baudrate and Modbus address
Status indicators 4 x 4-20mA, 1 x serial data, 1 x power (dual colour)
Other option 24V DC isolated power for 4-20mA sensors
Power 8-36V DC with reverse polarity protection, 8-24V AC or 5V from USB port
Operating temperature -20 °C to 75 °C
Housing Aluminium housing with DIN rail mounting option
Dimensions (W x H x D) 88mm x 35mm x 44mm
Weight 130g



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Functional Specification

Operating system Linux, Windows, MAC OS
USB to serial driver VPN drivers

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