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RASPBERRY PI LISÄKORTTI RS422/485 Näytä suurempana

RASPBERRY PI KORTTI RS422/485

RPI RS485

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Valmistajan kotisivu

41,50 €

Some RS485 shields are already available for the Raspberry Pi on the market, but these extensions are not suitable for professional use, because they come without a galvanic isolation between the RS485 bus and the Raspberry Pi. Without such isolation a damaging of the Raspberry Pi or malfunction of the device is possible, because of the large distances of a RS485 bus. Furthermore a full-duplex mode (RS422) is also not integrated.

The shield comes with a lot of additional features:

  • RS485 mode (half duplex)
  • RS422 mode (full duplex)
  • galvanic isolation between Raspberry Pi and connected RS485 bus
  • enhanced ESD protection
  • adjustable automatic transceiver switching for RS485 mode
  • adjustable control of transceiver/receiver via GPIO pin
  • adjustable Pull-Up, Pull-Down und terminating resistors
  • indicator LEDs for RX and TX 
  • removable block terminal for bus connection
  • many options adjustable via DIP switches

The RS485 is in use in many applications like:

  • industrial and home automation (for example MODBUS)
  • lighting control (DMX)
  • maritime and navigation controls (NMEA0183)
  • video surveillance (for example Pelco D)

If you like to know more about RS485 visit this website: http://www.radio-electronics.com/info/telecommunications_networks/rs485/rs-485-tutorial-basics.php

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