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ASI Tested and Approved

This USB-C to RS-232 DB9 Serial Adapter Cable provides a convenient solution for connecting older writers and other devices with serial ports to the latest notebooks that use USB C ports.


  • Host Connector: USB-C 2.0 Male
  • Device Connector: DB9 RS-232 Male
  • USB C to RS232 adapter cable connects from the USB-C port of a computer to a device with a female DB9 port; USB bus-powered cable connects to devices for configuration or programming
  • MALE TO MALE serial to USB cable provides a convenient solution for communicating with equipment that require a DB9 connector; Use a DB9 mini gender changer (sold separately) if the fixed hex screws will not mate with the equipment port
  • SIMPLE INSTALLATION of USB C to serial adapter using the drivers available for download from Cable Matters; Connect a null modem adapter (sold separately) to directly connect two computers with serial cables
  • WINDOWS & MAC COMPATIBLE with the latest OS versions; Some equipment may require additional proprietary software that may limit the OS compatibility
  • RS-232 COMPATIBLE USB C serial cable is required for many types of equipment including a CNC machine, GPS, telescope, Set-top box, Cisco network switch, sewing machine and more


OS Compatibility

  • macOS 10.11 and above (software must be user approved in 10.13)
  • Windows 7.1 and above
  • Equipment requiring additional proprietary software may not support the latest computer OS version

Important Note: This is NOT a VGA cable