8 Port Serial Hub USB to RS232 Adapter - Serial Cards & Adapters, Add-on Cards & Peripherals

DTECH USB to Serial Adapter DB25 DB9 RS232 to USB Cable 4 Feet with FTDI Chip Supports Windows 11 10 8 7 and Mac : Electronics

FTDI USB to Serial Adapter Cable w/ COM - Serial Cards & Adapters, Add-on Cards & Peripherals

PCI Express to 8-Port RS422/485 Serial Board w/EXAR Chip - Coolgear

StarTech.com USB to Serial Adapter Hub - 8 Port - DB9 (9-pin) - USB Serial - FTDI USB to RS232 Adapter - USB Serial (ICUSB2328) : Electronics

RS232 Serial Port DB 9-Pin To USB Adapter Dongle Cable

USB2 to 8-Port RS232-422-485 Serial TB Adapter - Coolgear

This USB 2.0 RS-232 Serial Adapter is the easiest way to add a serial port to your computer. Newer computers today are unequipped to support peripherals requiring a serial RS-232 connection because they lack serial ports; this affects PDA, digital camera, and GPS type equipment that may be used on your system. This adapter also allows you to add a serial port and monitor the status of your connections by using LED activity flashes.

Gearmo USB RS-232 Serial Adapter with LED Indicators Windows 10 8 7

USB to 32 Port COM Serial Adapter RS-232 has a Metal Rackmount case that also supports DIN-Rail mounting. The RS232 Serial ports on USB-32com-RM allow further use of existing devices.

Coolgear USB to 32-Port RS232 Adapter FTDI Chipset

StarTech.com 8-Port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Card - 16C1050 UART - Multiport Serial DB9 Controller/Expansion Card - 15kV ESD Protection - Windows & Linux (PEX8S1050) : Electronics

1 Port USB to RS232 DB9 Serial Adapter - Serial Cards & Adapters, Add-on Cards & Peripherals

USB 2.0 Industrial Adapter User Selectable RS232/422/485 FTDI Chip

StarTech.com 2-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Dual Serial DB9 Card - 16950 UART - Expansion Card - Windows & Linux (PEX2S953) : Electronics

Startech 2 Port Industrial Wall Mountable USB to Serial Adapter Hub with DIN Rail Clips ICUSB2322I. Add 2 DIN Rail-mountable RS232 Serial ports to any system through USB. The ICUSB2322I 2-Port Industrial USB to Serial Hub with DIN Rail Clips converts a single USB port into two RS232 serial ports, enabling you to connect to, monitor and control your serial devices.