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1 Port USB to RS232/422/485 DB9 Serial adapter with Surge Supression


Quick Overview

The USB-COMi-Plus USB Industrial single port db9 serial adapter provides instant connectivity to RS-232, RS-422, or RS-485 communication devices for bar code equipment or industrial scales. Provides industrial solution for applications requiring single node communications, powered by USB port, no external power adapter required.

Availability: In stock



  • Adds one RS-232, RS-422 or RS-485 serial port by connecting to a USB port
  • One DB9 male connector
  • No need to open chassis to set operation modes- upper case can be sliding open for easy RS-232, RS-422, RS-485 mode settings
  • Installed as standard Windows COM port
  • Full RS-232 modem control signals and hardware/software flow control
  • Automatic transmit and receive control for 2-wire RS-485 half-duplex mode
  • Built-in termination and biasing
  • High speed serial port with the baud rate up to 921.6K bps
  • Non-standard baudrates supported
  • LEDs of Power, TxD and RxD for easy port monitoring and diagnostic
  • Serial port protected with surge protection of 10KV
  • Powered by USB port, no external power adapter required
  • COM port number assigned can be changed to any COM port number required
  • Works with USB 1.1 & 2.0 host port
  • Supports Windows 7, Vista, 2003, XP, 2000 and Linux

Supported Signals

  • RS-232 data signals: TxD, RxD, RTS, CTS, DSR, DTR, DCD, RI, GND
  • RS-422 data signals: TxD-, TxD+, RxD+, RxD-, GND, RTS-, RTS+, CTS+, CTS-
  • RS-485 4-wire data signals: TxD-, TxD+, RxD+, RxD-
  • RS-485 2-wire data signals: Data-, Data+


Operating Temperature 0 to 55C (32 TO 131F)
Operating Humidity 5 to 95% RH
Storage Temperature -20 to 75C (-4 to 167F)

Safety Approvals

EN55022 Class B, EN55024, EN61000-3-2, EN61000-3

IEC 61000-4-2, IEC 61000-4-3, IEC 61000-4-4,

IEC 61000-4-5, IEC 61000-4-6, IEC 61000-4-8,

IEC 61000-4-11.

CISPR PUB. 22 and FCC Part 15 Class B.

Additional Information

Manufacturer No
Length No
Color Black/White
OS Support N/A

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