Support RS232 serial interface (both DB25 and DB9). The USB to Serial/Parallel Adapter provides the connection between USB and the traditional RS-232 serial port. Since the adapter uses no IRQs, it is perfect if you need many serial devices attached to your PC.
eBay
NEW USB Connector USB Extension Cable USB2.0 to 9Pin Conector 9 Pin Male to External USB A Male PC
Aliexpress UK
COM ports and Baud rates can be modified to desired set up. Interface: USB - 1.1 Type A RS-232 (9-pin) Male. USB 3.1 Type E Front Panel Header Male to USB 3.0 MotherBoard IDC 20 Pin Cable. HDMI Right Angle 8K Cable For Apple TV Roku Fire TV Switch Vizio Sony LG 1.8m.
eBay
Motherboard USB 9Pin Interface Header Splitter 1 to 2 Extension Cable Adapter 9-Pin USB HUB USB 2.0
Aliexpress UK
Includes a DB9F to DB25M pin adaptor for 25-pin RS232 serial communication. A cost-effective solution that bridges the compatibility gap between modern computers and legacy serial peripherals. USB 2.0 to Straight-Through RS232 Serial Adaptor.
eBay
Motherboard USB 9Pin Interface Header Splitter 1 to 2 Extension Cable Adapter 9-Pin USB HUB USB 2.0
Aliexpress UK
eBay
New USB to RS232 COM Port Serial Port 9 Pin DB9 Cable Serial Adapter Convertor With Female Adapter
Aliexpress UK
• USB to standard 9-pin / DB9 serial port. • Supports RS232 serial interface. Connector B: Serial (RS-232) Male. Connector A: USB. Cable Length: 80 cm. Features: Portable, Round Cable. Type: Cable. • 1x Cable.
eBay
USB Dongle Wifi Plug Free Bluetooth-compatible USB Adapter for PS4 9.0 System ESP32 Wifi Module
Aliexpress UK
Support the RS232 Serial interface. Transfer your RS232 device to a USB device. Colour: Blue.
eBay
20 Pin USB 3.0 Female To 9 Pin USB 2.0 Male Motherboard Header Adapter Cord Whosale&Dropship
Aliexpress UK
Compliant with USB HID Specification WinChipHead CH340 chipset USB Bus powered USB Rev 1.1 compliant Supports RS-232 serial interface Over 1Mbps transfer rate Supports remote wake-up and power management Supports Windows 98SE/2000/ME/XP/Vista/Windows 7 32 & 64-bit Driverless installation with Windows XP, Vista & Win 7 1.
eBay
original Game Accessories One-Key JB Tool Mod Kit For PS4 FW 9.0 11.0 System USB Dongle USB Adapter
Aliexpress UK
1 x 1.8m RS232 DB9 9 Pin Female to USB 2.0 A Male PLC Serial Cable for Vigor VB VH. Connector B: DB9 9Pin Female. IEEE1394 6 Pin Female to USB 2.0 A Male Cable 0.2m. USB 2.0 Type-A Male to USB 2.0 A Female Extension Data Flat Slim FPC Cable 0.2m.
eBay
OULLX 4 Port 2 Port USB 2.0 Motherboard Rear Panel Expansion Bracket to IDC 9 Pin Motherboard USB
Aliexpress UK