Technical data

126
Confidential
Communication: RS485
RS485 signals are floating and each signal is transmitted over a + line and a - line.
RS485 receiver compares the voltage difference between both lines, instead of
the absolute voltage level on a signal line.
With RS485 there is no any common zero as a signal reference.
Several volts difference in the ground level of the RS485 transmitter and receiver does
not cause any problems.