50 lines
1.5 KiB
Markdown
50 lines
1.5 KiB
Markdown
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---
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name: RS485 Pi
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class: board
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type: com
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formfactor: pHAT
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manufacturer: AB Electronics UK
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description: UART to RS485 Converter
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url: https://www.abelectronics.co.uk/p/77/rs485-pi
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github: https://github.com/abelectronicsuk
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schematic: https://www.abelectronics.co.uk/docs/pdf/schematic-rs485pi.pdf
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buy: https://www.abelectronics.co.uk/p/77/rs485-pi
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image: 'ab-rs485-pi.png'
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pincount: 40
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eeprom: no
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power:
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'1':
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ground:
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'6':
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'9':
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'14':
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'20':
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'25':
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'30':
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'34':
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'39':
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pin:
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'8':
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mode: UART
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'10':
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mode: UART
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-->
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#RS485 Pi
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The RS485 Pi is a UART to RS485 serial converter for the Raspberry Pi.
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The RS485 port is connected to the UART port on the Raspberry Pi using a SN65HVD72 interface. The SN65HVD72 IC converts the 3.3V UART port to RS485 differential voltages allowing communication with RS485 compatible devices over a twisted pair cable. The RS485 port can be accessed through the DB9 port or the solder points on the PCB.
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The RS485 Pi contains protection against voltage spikes in the form of a TVS Diode and two 10O, Pulse-Proof Thick-Film Resistors. A 120O terminator resistor is included with the board.
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##Features
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- RS-485 Half Duplex Port.
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- Up to 250 kbps transfer rate.
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- Use the Raspberry Pi to control external RS-485 devices.
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- Stackable with other Raspberry Pi accessory boards.
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- Mounting holes for use with the AB Electronics UK mounting kits (sold separately)
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[Configuring the UART communication on the Raspberry Pi](https://www.abelectronics.co.uk/kb/article/20/raspberry-pi-serial-port-usage)
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