TLC422 Series

Port-powered RS-232 to RS-422 Converter

  • Support bidirectional data conversion between 1 RS-232 serial port and 1 RS-422 serial port
  • Unique port-power technology, no need for external power supply
  • Low power consumption, equal to that of normal light-emitting diodes in static operation, can be truly called passive
  • Automatic serial port signal rate detection, support 0~115200bps serial port baud rate
  • Adopt automatic data flow control technology, which can detect and control the direction of data transmission
  • Compact size and easy installation


TLC422 series are pocket RS-232 to RS-422 interface converters with high cost-effectiveness, which can implement bidirectional data conversion between serial port RS-232 and RS-422 and need no external power supply. This series have two types of products and provide a RS-232 and a RS-422 serial port that support optional DB9 and DB25 connection, which can meet the requirement of different scenes.

The RS-232 port of TLC422 series could connect to PC directly and obtain power from PC serial port via TXD, RTS and DTR signal line. RS-422 serial port DB9M is equipped with pluggable terminal blocks which is easy and convenient to use and can be widely used in point-to-point communication, industrial distributed system, POS cash register, bank, insurance, security, canteen food selling system, transportation toll system, industrial distributed control, various PLC, data watt-hour meter, gas meter, etc.

Serial Port  

Standard: EIA RS-232C, RS-422

Serial port quantity: 1 RS-232 serial port, 1 RS-422 serial port

Baud rate: 0~115200bps

RS-232 signal: TXD, RXD, GND

RS-422 signal: T+, T-, GND, R+, R-

Interface type: RS-232 serial port, adopts DB9 or DB25, Female;

RS-422 serial port, adopts DB9 (equipped with 5-pin terminal blocks) or DB25M

Transmission distance: RS-232 serial port, 15m;

RS-422 serial port, 1200m

Interface protection: 15KV electrostatic protection







No external power supply required

Obtain power from TXD, RTS, DTR signals of RS-232 serial port





Static power consumption: ≤10mA

Dynamic power consumption(mean): ≤40mA





Operating temperature: -20~60℃

Storage temperature: -25~85℃

Relative humidity: 5%~95%(no condensation)





Housing: plastic

Dimension (W x H x D): 90mm×33mm×16.5mm(DB9,with terminal blocks)


Weight: 40g






3 years


Available Models RS-232(DB9) RS-232(DB25)  RS-422(DB9) RS-422(DB25) Power Supply
TLC422/9 1  – 1
TLC422/25 1 1