USB 2.0 to RS232 Female DB9 Serial Cable, Connect USB Port on your Computer to your RS232 DP 9Pin Devices. If your RS232 device is a female port, you need to connect a DB9 RS232 converter or cable between the RS232 port of the device and the cable.
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FT232RL FT232 FTDI USB 3.3V 5.5V to TTL Serial Adapter Module for Arduino FT232 Pro Mini Port USB TO TTL 232 Mini / Type-C USB
Aliexpress UK
USB 2.0 to RS232 Female DB9 Serial Cable, Connect USB Port on your Computer to your RS232 DP 9Pin Devices. If your RS232 device is a female port, you need to connect a DB9 RS232 converter or cable between the RS232 port of the device and the cable.
eBay
FT232RL FT232 FTDI USB 3.3V 5.5V to TTL Serial Adapter Module for Arduino FT232 Pro Mini Port USB TO TTL 232 Mini / Type-C USB
Aliexpress UK
SKU: 000369 BRAND: NEWLink EAN: 5055383403691 WEIGHT: 0.131.
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FT232RL FT232 FTDI USB 3.3V 5.5V to TTL Serial Adapter Module for Arduino FT232 Pro Mini Port USB TO TTL 232 Mini / Type-C USB
Aliexpress UK
Drive Free For Windows 11/10/8.1/8, Driver Installation Required For Windows 7/xp, Linux, And Mac Os.with Standard Usb Type A Male To Standard 9-pin Db9 Rs-232 Serial Connector.tinned Copper Conductor(Wire Guage#24#28) And Triple Shielding Ensure The Best Data Transfer Rate.
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RS-232 RS232 to RS-485 RS485 Interface Serial Adapter Converter NEW
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Support the RS232 Serial interface. Transfer your RS232 device to a USB device. Colour: Blue.
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RS-232 RS232 to RS-485 RS485 Interface Serial Adapter Converter NEW
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This is the Pro model: ICUSB232PRO. These are still £25+ each on Amazon. Startech USB to Serial adapter with Com port retention.
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FT232RL FTDI USB 3.3V 5.5V to TTL Serial Adapter Module for Arduino FT232 Pro Mini USB TO TTL 232
Aliexpress UK
Product: USB to RS232 TTL CH340G Converter. CH340G USB-to-serial chip – stable and widely supported. 1x USB to RS232 TTL CH340G Converter Module. Drivers for CH340G can be downloaded online if not pre-installed.
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TENSTAR 2pcs FT232RL Type-C USB 3.3V 5.5V to TTL Serial Adapter Module FT232 USB TO TTL 232 For Pro Mini
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6ft industrial grade USB to RS232(DB25 Male) adapter cable. It is an ideal solution for computer to communicate with many serial devices directly through USB port such as CNC, PLC, plotter, modem, Scanner etc.
eBay
FT232RL FTDI USB 3.3V 5.5V to TTL Serial Adapter Module for Arduino FT232 Pro Mini USB TO TTL 232
Aliexpress UK