Devantech 8-Channel, 1A Optically Isolated USB Relay Module - RobotShop
2-Port Industrial USB 2.0 to RS-422 / 485 Optical Isolated Adapter - Coolgear
StarTech.com ICUSB2321FIS USB to Serial Adapter - Optical Isolation - USB Powered - FTDI USB to Serial Adapter - USB to RS232 Adapter Cable - Newegg.com
Devantech 8-Channel, 1A Optically Isolated USB Relay Module - RobotShop
Digital Isolators Offer Easy to Use Isolated USB Option | Analog Devices
USB Isolator for Protection of all types of USB devices
USB to 32 Optically Isolated Inputs OEM Board - Sealevel
Black Box USB TO RS232 OPTO-ISOLATED CONVERTER (SP385A-R3)
Optically Isolated Usb To Serial Port 5v3.3v2.5v1.8v Optically Isolated Usb To Ttl Serial Port Ch340 Uart - Integrated Circuits - AliExpress
USB to 4 Optically Isolated Inputs/4 Reed Relay Digital Interface OEM Board - Sealevel
Amazon.com: Black Box USB to RS232 Opto-Isolated Converter : Electronics
Optically Isolated USB to Serial Adapter by Emil Johnsen — Kickstarter
USB to RS485 | RS422 Optically Isolated Industrial Serial Adapter
USB to 32 Optically Isolated Inputs Module - Sealevel
Fluke OC4USB USB Interface Cable | Fluke
USB to RS485 Isolated adapter / converter
/i/71802/products/2017-05-30T20%3A35%3A51.447Z-OptoUSB-177-4000px.JPG?1606306133 "Optically Isolated USB-FTDI Interface (OPTOUSB) from Land Boards, LLC on Tindie")
Optically Isolated USB-FTDI Interface (OPTOUSB) from Land Boards, LLC on Tindie
USB to RS485 | RS422 Optically Isolated Industrial Serial Adapter
Industrial Optical Isolated USB 2.0 to RS485 RS-485 Converter Adapter, 600W Surge Protection, support win7
USB to RS485 Isolated adapter / converter
KMtronic Ltd: USB to RS485 FTDI interface adapter
Opto-Isolated USB to RS232 / RS485 / RS422 Converter (Industrial / Por – CommFront
USB to 32 Optically Isolated Inputs Digital Interface Adapter - Sealevel
