[André Sarmento] needed to connect a computer to an RS-485 bus. 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.

The SmartID S10 reader. Transmit frequency 13.56 MHz. Can be mounted on a door mullion or single-gang electrical box. Secure data transmission with 3DES encryption. Reads any MIFARE/DESFire ...