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Description
RS-485 Half Duplex Port
Up to 250 kbps transfer rate
Use the Raspberry Pi to control external RS-485 devices
Stackable with other Raspberry Pi accessory boards
The RS485 Raspberry Pi HAT is connected to the UART port on the Raspberry Pi using a SN65HVD72 interface. The SN65HVD72 IC converts the 3.3V UART signals to RS-485 voltages allowing communication with RS-485 compatible devices over a DB9 serial cable or twisted pair cable. The RS-485 port can be accessed through the DB9 port or the solder points on the PCB. The RS485 Pi contains protection against voltage spikes in the form of a TVS Diode and two 10-Ω, Pulse-Proof Thick-Film Resistors.
