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CONTEC Launches USB2.0-Compliant Compact Serial I/O Unit

CONTEC Launches USB2.0-Compliant Compact Serial I/O Unit

One Serial I/O Unit Expands RS-232C-Standard 4-Port

CONTEC CO., LTD. (Tokyo Stock Exchange Code: 6639) today introduced the new USB2.0-compliant compact serial I/O unit that expands RS-232C-Standard 4-port to computer that support USB. CONTEC plans to ship COM-4CX-USB September 1, 2011 as a new product in the PC-HELPER series.

RS-232C 4ch Serial I/O Unit for USB

Product Name


I/O Specifications

RS-232C 4-port
Serial I/O Unit for USB


  • RS-232C-standard asynchronous serial communication 4-port (9pin D-SUB)
  • aud rate: 300 - 921,600bps for each port


The new product, COM-4CX-USB is a unit that is expandable RS-232C serial communication 4-port to Windows-based computer which supports USB1.1 or 2.0. This product helps to connect commercial equipment, such as measurement equipment or audio/ video equipment, with laptop or desktop computer that don’t support RS-232C serial port to perform data communication. The maximum baud rate is 921,600ps, and each port is equipped with FIFO buffers (Transmit: 128-byte, Receive: 384-byte). It provides stability data transfer at high-speed communication. Furthermore, each 4 port is equipped with D-SUB connectors. So you can use store-bought serial cables when you connect COM-4CX-USB with equipments.

[Use Conditions]

  • Windows-based PC that supports USB1.1 or USB2.0.

[Supported OS]

  • 32bit OS :Windows 7 / Vista / XP / Server 2008 / Server 2003
  • 64bit OS :Windows 7 / Vista / XP / Server 2008 / Server 2003


  • Max. Baud Rate : 921,600bps RS-232C (Serial Communication)
  • Possibly used as Windows-standard COM ports, using the bundled driver library
  • Each port is equipped with separate 128-byte / 384-byte FIFO buffers for transmit and receive.
  • Compatible to USB1.1/USB2.0
  • USB HUB function
Designed: Hien Dai Hoa Jsc

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