Advantech ADAM-4520 Isolated RS-232 to RS-422/485 Converter

Advantech ADAM-4520 Isolated RS-232 to RS-422/485 Converter


  • Automatic RS-485 data flow control
  • 3000 VDC isolation protection
  • Surge protection RS-485 data line
  • Transmission speed up to 115.2 Kbps
  • Networking up to 1200 meters (4000 feet)
  • Power and data flow indicator


Advantech’s ADAM-4520/4520I converter uses RS-422 and RS-485 on systems originally equipped with RS-232. RS-232 has limited transmission speed, range, and networking capabilities, RS-422 and RS-485 standards overcome these limitations by using differential voltage lines for data and control signals. The ADAM-4520I has the added features of wide power input and wide operating temperature range.

The ADAM-4520/4520I turns RS-232 signals into isolated RS-422 or RS-485 signals allowing you easily build an industrial grade, long distance communication system with standard PC hardware. It extends the communication distance by 4000 ft. (1200 m) or increases the maximum number of connected nodes by 32.

Ordering Info

  • ADAM-4520 – Isolated RS-232 to RS-422/485 Converter
  • ADAM-4520I – Isolated RS-232 to RS-422/485 Converter with wide power input and operating temperature


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  • Mounting: Panel
  • Power: 10-30VDC (4520) 10-48VDC (4520I)
  • Temperature: -10 to 70C
  • Temperature (Operating): -10 ~ 70° C (4520) -40 ~ 85° C
  • Humidity: 5 ~ 95% RH
  • Isolation: 3kV
  • Temperature (Storage): -25 ~ 85° C (-13 ~ 185° F)
  • Interface: RS-232 to RS-422/485
  • Isolation Protection: 3,000 VDC
  • Communication Speed: Serial: From 1,200 to 115.2 k
  • Data Flow Control: Yes
  • Connector: RS-232: female DB9 / RS-422/485: plug-in screw terminal
  • Power Requirement: 10~30 VDC