• Automatic RS-485 data flow control
  • 1000 VDC isolation protection
  • RS-485 data line surge protection
  • Up to 115.2 Kbps transfer rate
  • Network up to 1200 meters (4000 feet)
  • Space for termination resistor
  • Power and data flow indicator for troubleshooting
  • Power requirement: +10 to +30 VDC
  • Easily mounts on DIN-rail, panel or piggyback
  • RS-232 and RS-485 can be set to different baud rates
  • Watchdog timer function
  • Software can be used in addressable or non-addressable mode
SKU: IOT37645


Product overview:

ADAM-4521 is an isolated addressable RS-422/485 to RS-232 converter of Advantech – Taiwan currently widely distributed by ADTECH.

ADAM-4521 is designed according to industry standards, is compact, and is easy to get a signal about a PLC, computer, microprocessor, embedded computer, etc.The product is currently being used for M2M and IoT problems. of fields: electricity, hydrometeorology, intelligent traffic, security control systems…


Connectors1 x plug-in terminal block

(#14 ~ 22 AWG)


1 x DB9-F (RS-232)

Isolation Voltage1,000 VDC
Power Consumption1.0 W @ 24 VDC
Serial Communications
InputRS-485 (2-wire) or

RS-422 (4-wire)

OutputRS-232 (DB9)
Speed Modes (bps)300, 600, 1,200, 2,400, 4,800, 9,600, 19.2 k, 38.4 k, 57.6 k, 115.2 k (software configurable)


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