POSYC 4301/4302/4303 series industrial PCs
Installation, use and maintenance manual - EN
Rev. 1.02
30
7.4.4 Serial signals RS485 ports, Profibus DP
The following figures show the waveforms detected by means of an oscilloscope in different connection situa-
tions.
Example of a correct signal
Example of a signal with unfinished lines
Example of a signal with placed terminations
on the wrong device
Example of a signal with incorrect value terminations
Example of signal on intermediate devices
with long connections
