UOTEK Serial to Fiber Converter RS-232 RS-422 RS-485 to Fiber Optic Modem RS422 RS485 RS232 Serial Media Converter Adapter UT-277SM-ST

UOTEK Serial to Fiber Converter RS-232 RS-422 RS-485 to Fiber Optic Modem RS422 RS485 RS232 Serial Media Converter Adapter UT-277SM-ST

Waveshare USB to RS485 Converter with Protection Circuits, Compatible with TVs

DTECH USB to RS422 RS485 Serial Port Converter Adapter Cable with FTDI Chip Supports Windows 11 10 8 7 XP Mac -1.5 Feet