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A new standard for pinouts
RS422 / RS485 Shield for Arduino UNO Pro cost effectiveSome RS485 shields for the Arduino are not suitable for professional use, because they come without galvanic isolation between the RS485 bus and the Arduino. Without such isolation, it's possible to damage the Arduino or cause a malfunction of the device due to the large distances of an RS485 bus. Furthermore, a full duplex mode (RS422) is also not integrated. The Arduino RS422 RS485 Shield resolves many of these shortcomings whilst adding additional
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