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
USB to Serial Converter COJXU E810 Series ModBus TCP/IP MQTT Module RJ45 1/2/4 Serial Ports Converter Industrial Grade
Aliexpress UK
Support the RS232 Serial interface. Transfer your RS232 device to a USB device. Micro USB Cable. Colour: Blue. HDMI Cable. RJ45 Cable. iPhone Cable. Type C Cable.
eBay
SAS Serial Attached SCSI SCSI SFF-8482 to SATA power cord 29-pin serial port cable converter HDD hard disk SAS to SATA adapter
Aliexpress UK
GOOD USED WORKING CONDITION. REF:CD_33
eBay
2Pcs CH340 USB to RS232 Serial Port 9 Pin DB9 Cable Serial COM Port Adapter Convertor Support Windows 7 Total Length 80cm
Aliexpress UK
A Lenovo notebook + Serial small plate (max3232) + usb to serial cable (340 drivers) Download stc89c52 not use; Lenovo desktop + Serial small plates (max3232) + usb to serial cable (340 drivers). Communications IC: MAX3232.
eBay
SATA Adapter 44 Pin Male IDE PATA 2.5 Inch SSD HDD Hard Disk Drive To A Serial ATA Port Converter Card For Laptop
Aliexpress UK
Description: The USB to RS232 Serial DB9 Adapter Cable with COM Retention offers a professional grade solution for connecting legacy or industrial RS232 serial devices to a laptop or desktop computer through USB - eliminating the expense of upgrading serial peripherals for compatibility Note: 1)this cable is not brand new, it was never used,however,there are some minus test,dirty and scratches from bulk packing. 2)if driver needed, pls contact us. 3)and also there might be some rustings due to long stockings.But every cable was checked and tested before delivery. Package contents: USB to RS232 cable with built-in FTDI chip.
eBay
Modbus serial port RS485 to Ethernet Converter server USR-TCP232-304 data transmission DHCP/DNS Supported
Aliexpress UK
Support the RS232 Serial interface. Transfer your RS232 device to a USB device. Colour: Blue.
eBay
Industrial Grade Isolated USB to RS485 Converter – Serial Port Adapter with CH340 & CP2102 Chipset
Aliexpress UK
The integrated electronics of these connective peripheral adapters use the FTDI FT4232H, FT2232H, or FT232H, and include RS232, RS485, or RS422 level shifters, plus TXD/RXD LEDs to provide a visual indication of data traffic through each module.
eBay
USB to CAN Bus Converter Adapter serial port TO CAN / RS232 232 TO CAN communicate analysis With TVS surge protection
Aliexpress UK
1x USB to RS232 DB9 Cable. USB 2.0 to Serial DB 9 Pin RS232 Cable Lead Adapter Connector. USB to RS232 Cable. Support RS232 serial interface (both 9). USB specification revision 2.0 & 1.1 compliant. Suitable for PDA and Modem.
eBay
New USB to RS232 COM Port Serial Port 9 Pin DB9 Cable Serial Adapter Convertor With Female Adapter Supports for Windows 8 No CD
Aliexpress UK