The TTL-to-RS485 module convert the TTL level to RS485 level. From a 2×5-pin TTL input header to a two-pole screw terminal output port. The pinout of the input pins makes it plug-in compatible with the SBC-SAM9G45 development board's COM0-COM3 expansion headers. A ribbon cable is provided to make that connection. However, the standard 2.54mm pin pitch makes it easy to wire up to practically any development system with TTL UART headers
TTL level input, 2×5-pin 2.54mm (0.1") pitch header.
RS485 level, screw terminal connector, 3.81mm pitch.