Tripp Lite Keyspan High Speed 4 Port USB to DB9 Serial Adapter Hub - serial adapter - USB - RS-232 x 4 - USA-49WG - USB Adapters - CDW.com
![4 Port Serial Hub USB to RS232 Adapter - Serial Cards & Adapters | Add-on Cards & Peripherals | StarTech.com 4 Port Serial Hub USB to RS232 Adapter - Serial Cards & Adapters | Add-on Cards & Peripherals | StarTech.com](https://media.startech.com/cms/products/gallery_large/icusb234854i.b.jpg)
4 Port Serial Hub USB to RS232 Adapter - Serial Cards & Adapters | Add-on Cards & Peripherals | StarTech.com
![4-port USB 2.0 to 4X RS232 serial cable splitter converter ZE552A(FTDI Chipset+win 10 supported) - AliExpress 4-port USB 2.0 to 4X RS232 serial cable splitter converter ZE552A(FTDI Chipset+win 10 supported) - AliExpress](https://ae01.alicdn.com/kf/H7b4f0a69bc2141b88e66e501d8ee5117u/4-port-USB-2-0-to-4X-RS232-serial-cable-splitter-converter-ZE552A-FTDI-Chipset-win.jpg)
4-port USB 2.0 to 4X RS232 serial cable splitter converter ZE552A(FTDI Chipset+win 10 supported) - AliExpress
![Shop | StarTech.com 4 Port Serial Hub USB to RS232/RS485/RS422 Adapter - Industrial USB 2.0 to DB9 Serial Converter Hub - IP30 Rated - Din Rail Mountable Metal Serial Hub - 15kV Shop | StarTech.com 4 Port Serial Hub USB to RS232/RS485/RS422 Adapter - Industrial USB 2.0 to DB9 Serial Converter Hub - IP30 Rated - Din Rail Mountable Metal Serial Hub - 15kV](https://cdn.cs.1worldsync.com/50/19/50191db5-96fe-4a04-a9e5-167851e39e96.jpg)
Shop | StarTech.com 4 Port Serial Hub USB to RS232/RS485/RS422 Adapter - Industrial USB 2.0 to DB9 Serial Converter Hub - IP30 Rated - Din Rail Mountable Metal Serial Hub - 15kV
![4 Port Serial Hub USB to RS232 Adapter - Serial Cards & Adapters | Add-on Cards & Peripherals | StarTech.com 4 Port Serial Hub USB to RS232 Adapter - Serial Cards & Adapters | Add-on Cards & Peripherals | StarTech.com](https://media.startech.com/cms/products/gallery_large/icusb234854i.main.jpg)
4 Port Serial Hub USB to RS232 Adapter - Serial Cards & Adapters | Add-on Cards & Peripherals | StarTech.com
![4 Port USB to RS232 Serial Adapter Hub - Serial Cards & Adapters | Add-on Cards & Peripherals | StarTech.com Europe 4 Port USB to RS232 Serial Adapter Hub - Serial Cards & Adapters | Add-on Cards & Peripherals | StarTech.com Europe](https://media.startech.com/cms/products/gallery_large/icusb2324.main.jpg)