StarTech.com

USB-C to Serial Adapter

Connect an RS232 (DB9) peripheral to your USB-C device

Product ID: ICUSB232C

  • USB-C to straight-through RS232 DB9 serial adapter
  • High-speed 921.6Kbps baud rate
  • Compatible with Windows®, macOS® and Linux
  • USB-powered - no external power adapter required
30,99 € EUR exc VAT
37,19 € EUR inc VAT

Overview

This USB-C™ to serial adapter lets you connect your USB-C devices to your legacy serial equipment. It converts a USB-C port on your laptop or computer into a RS232 DB9 serial port, giving you a cost-saving way to connect to serial devices such as point-of-sale terminals, serial modems, industrial equipment, and a wide variety of other RS232 peripherals.

Connect with ease

The RS232 adapter cable is compatible with Windows®, macOS and Linux® operating systems, which makes it easy to integrate into mixed environments.

Ready for mobile or desktop applications

The USB-C to serial adapter is USB powered, so you don’t need an additional external power supply. It’s a compact solution that’s easy to bring along with your laptop, when you’re on the go.

The ICUSB232C is backed by a StarTech.com 2-year warranty and free lifetime technical support.

Applications

IT administrators looking to add legacy functionality to newer notebooks, PCs and servers that lack an integrated RS232 port

Connect bar code scanners, receipt printers and other point of sale devices

Connect, monitor and control industrial/automotive sensors and other sensitive equipment

Connect and program LED and digital signage boards

Technical Specifications

Warranty Information
Warranty 2 Years
Hardware
Bus Type USB-C
Chipset ID Prolific - PL2303RA
Industry Standards USB 1.1/2.0 RS232
Interface Serial
Port Style Cable Adapters
Ports 1
Performance
Data Bits 5, 6, 7, 8
FIFO 512 Bytes
Flow Control None, Xon/Xoff, RTS/CTS, DTR/DSR
Max Baud Rate 921.6 Kbps
MTBF 30,000 Hours
Parity Odd, Even, Mark, Space, or None Parity Modes
Serial Protocol RS-232
Stop Bits 1, 1.5, 2
Connector(s)
Connector Type(s) 1 - USB Type-C (24-pin) USB 2.0 Male
1 - DB-9 (9 pin, D-Sub) Male
Software
Microsoft WHQL Certified Yes
OS Compatibility Windows® 7, 8.1, 10
Windows Server® 2008 R2, 2012 R2, 2016
Mac OS® 10.11 and 10.13
Linux 2.6.x to 4.4.x LTS Versions only
Special Notes / Requirements
System and Cable Requirements One available USB-C port
Power
Power Source USB-Powered
Environmental
Humidity 0~65% RH
Operating Temperature 0°C to 60°C (32°F to 140°F)
Storage Temperature -20°C to 80°C (-4°F to 176°F)
Physical Characteristics
Product Height 15 mm [0.6 in]
Product Length 430 mm [16.9 in]
Product Weight 36 g [1.3 oz]
Product Width 30 mm [1.2 in]
Packaging Information
Shipping (Package) Weight 52 g [1.8 oz]
What's in the Box
Included in Package 1 - serial adapter cable
1 - quick-start guide

Compatibility

View full OS compatibility
Windows® 7, 8.1, 10
Windows Server® 2008 R2, 2012 R2, 2016
Mac OS® 10.11 and 10.13
Linux 2.6.x to 4.4.x LTS Versions only

Certifications

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Accessories

Product Support

Frequently Asked Questions

Troubleshooting

When you troubleshoot issues with a serial device, there are some quick tests that you can complete to rule out potential problems. You can test to make sure that the following components are working correctly and are not the source of the issue:

  • Serial cables

  • Serial ports

  • Serial devices

To test your setup components, try the following:

  • Use the serial cable, serial port, and serial device in another setup to see if the problem is with the components or the setup.

  • Use a different serial cable, serial port, and serial device in your setup to see if the problem persists. Ideally, you should test a component that you know works in another setup.

When you test your cables, it is recommended that you do the following:

  • Test each cable individually.

  • Use short cables when you are testing.

When you test the serial ports and serial device, it is recommended that you do the following:

Note: Some serial devices work only if the COM port number is between a certain range. For example, COM1 to COM4.

To check whether or not an RS-232 serial port is working, perform an RS-232 loopback test by doing the following:

  1. If your serial port is not female, convert it by taking a female/female cable or gender changer and plugging it into the serial port.
  2. Take a metal paperclip or wire and cross pins 2 and 3. If you look closely at the female end, the pins should be numbered.
  3. Open a telnet session on the COM port number of the device that you are testing. To find out the COM port number, refer to the following FAQ: https://www.startech.com/faq/com-port-listing-windows.

Note: To open a telnet session on the COM port, you need a telnet client like PuTTY or Hyper Terminal. Windows XP comes with Hyper Terminal.

  1. When the session is open, anything you type into it you should see. The loopback test fails when you cannot see what you are typing.

If the loopback test fails, make sure that the serial cable or gender changer that you are using works and that the adapter is in the correct port. 

You can check multiple ports at the same time by opening multiple sessions, putting the loopback adapter on one port, and trying to type into each session.  When you can see what you are typing, you know that the COM port is working and you can see which port number the physical serial port is. Close the window for the port that you just tested to speed up the testing of the remaining serial ports.

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