RS422 / RS485 HAT for Raspberry Pi

Professional RS422/485 Interface Extension

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.

Our 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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