The RS485 3 Click Board™ uses SN65HVD31DR from Texas Instruments, a tri-state differential line driver and differential input line receiver. The Click Board™ is intended to be used as UART to RS-422/RS-485 communication interface. It is suited for transmitting smaller blocks of data over long distances, using the four-wire bus, allowing for full-duplex communication.
It can be used as a transceiver between the UART interface and RS-422/RS-485 communication bus. The RS485 3 Click Board™ can be used for controlling various building automation systems, lighting controllers, sensors and many small embedded devices that can all share the same bus, which can stretch up to 254 nodes and up to 1200m in length.