Opto-Isolated USB to RS232 / RS485 / RS422 Converter (Industrial / Port -Powered)
USB TO RS232/RS422/RS485 ADAPTERS W/OPTICAL ISOLATION (FULL SPEED) — Connective Peripherals - Global Store
Optically Isolated 7-Port USB Hub with SeaLATCH USB Ports - Sealevel
Ruggedized Single Port Inline USB Isolator Cable - Sealevel
Amazon.com: Optical Cables by Corning Thunderbolt 3 USB Type-C Male Optical Cable, 5m : Electronics
Amazon.com: StarTech.com USB to Serial Adapter - Optical Isolation - USB Powered - FTDI USB to Serial Adapter - USB to RS232 Adapter Cable (ICUSB2321FIS),Black : Electronics
Fluke OC4USB USB Interface Cable | Fluke
Amazon.com: Coolgear Industrial USB 2.0 to RS-232 Serial Adapter Optical Isolation : Electronics
Optically Isolated 7-Port USB Hub - Sealevel
Black Box USB to RS232 Opto-Isolated Converter - Walmart.com
USB 2.0 4-Port Isolated Hub - Coolgear
Industrial USB-A 5KV Optical Isolation Adapter Din Rail - Shentek