Advantech BB-USOPTL4 - serial adapter - USB - RS-422/485

Supports 2-wire RS-485 or 4-wire RS-422/485. Long range, multi-drop communications. Easy to set up with plug in terminal block on RS-422/485 side and a high retention USB connector that works with a standard USB cable (included). LEDs indicate Transmit and Receive. USB Port Powered.