Anyone has any experience using the Multi USB/RS232/RS485/TTL Converter with Arduino (Leonardo) ? Will it essentially do what the UART to RS 485 (or MAX 485) does? Also, If you know something about it, could you advise on the wiring?
(My intention is to use it between Arduino Leonardo and Dynamixel servos and wanted to confirm this before I purchase it.)
Yes, you should be able to do this setup with this board. Connect your Arduino Leonardo to the ATTL connector and connect the Dynamixel servos to the B485 connector.
You could also use the Smart Servo Controller for Arduino which has its own microcontroller that communicates with the main Arduino using SPI bus. A library is provided in the Useful Links section that provides a convenient API for controller Dynamixel servos specifically.