You are currently viewing the content available in Vietnam. If you are looking for information for another region, please select the correct country from the top-left dropdown in the page and 'Navigate to Browse FAQs' in the Support menu.
How to wire properly the positive/negative signal to D0/D1 pin of serial port on M340 or NOM for RS485
Question:
How to wire properly the positive/negative signal to D0/D1 pin of serial port on M340 or NOM for RS485?
Answer:
RS485 is the difference signal, so it makes no sense to indicate positive / negative for D1, D0.
Due to the different convention, customer may came across Data+/Data- or B/A combination of wires.
Just wire the Data+ to D1 or B to D1, remeber that when D1>D0, the logical signal is positive inside while it is negative when D1<D0
How to wire properly the positive/negative signal to D0/D1 pin of serial port on M340 or NOM for RS485?
Answer:
RS485 is the difference signal, so it makes no sense to indicate positive / negative for D1, D0.
Due to the different convention, customer may came across Data+/Data- or B/A combination of wires.
Just wire the Data+ to D1 or B to D1, remeber that when D1>D0, the logical signal is positive inside while it is negative when D1<D0
Released for: Schneider Electric Vietnam
