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Coolgear Industrial USB 2.0 to RS-232 Serial Adapter Optical Isolation

In stock.
Ships from United States.
  • USB-COM-SI-M adds one industrial RS-232 serial port with optical isolation. This item does not require external power fully supports a simple USB port (USB 1.1 / 2.0 /3.0 )
  • 2000V DC optical isolation/25KV ESD surge protection
  • Industrial metal housing with DIN rail bracket

USB serial RS232 adapter is optically isolated and designed for industrial applications to instantly add a RS-232 serial communication port to your system.

The USB Serial Adapter provides instant connectivity with modems ISDN TAs PDAs handheld & pocket PCs digital cameras POS serial printers. It is suitable for remote access retail and industrial applications data collection and other applications requiring high speed RS-232 serial communication port. Complete drivers support Windows 10 7 Vista XP 2008 2003 2000.


  • Adds one RS-232 serial port by connecting to USB port
  • Installed as standard Windows COM port
  • Full RS-232 modem control signals
  • RS-232 data signals: TxD RxD RTS CTS DSR DTR DCD RI GND
  • Serial port speed up to 230K bps
  • USB cable of 0.9 meter included
  • Powered by USB port. No external power adapter required.
  • FIFO: 128 byte transmit buffer 384 byte receive buffer
  • Easy plug & play installation and RS-232 device connection
  • Works with USB 1.1 & 2.0 host port
  • One DB9 male connector
  • LEDs of Power RxD TxD for monitoring port status & easy diagnostics
  • SECC sheet metal chassis with DIN rail bracket
  • Dimensions: 57mm x 76mm x 23mm 82mm x 76mm x 23mm (with DIN rail bracket)
  • COM Port Number can be changed to COM1 to COM4 to support HyperTerminal or any other COM port number required

Warranty & Returns

Warranty, Returns, And Additional Information

Return Policies

  • Return for refund within: 30 days
  • Return for replacement within: 45 days
  • This item is covered by CoolDrives Return Policy

Manufacturer Contact Info