A simple converter can be sourced online, but the only thing he could find locally that was even close was a USB to RS-232 converter. He used that component to craft his own USB to RS-485 bridge .

USB to RS-485 Converter Module – Get to Work Now. After a short detour, we are now back in the mainstream! The following information will tell you how to use your USB to RS-485 converter module with ...

The USB to serial adapter has a USB-A port on one end and a serial port on the other. ... Although RS232 is the most widely used, these adapters can also feature RS485 or RS422 serial interfaces.

“It can extend the communication distance by 4,000ft [1.2km] or increase the maximum number of connected nodes by 32.” Externally-accessible DIP switches on one end of the case select: RS-422 ...

The RS-485 receiver, IC1a, is always enabled. It senses the Tx output of the PTP slave board, drives the timer (IC2), and enables the RS-485 transmitter (IC1b), which is typically in a quiescent ...