![]() EIA-422/485 compliant devices cannot be damaged by reverse wiring the +/- (A/B) signals. ![]() For historical reasons, some vendors reverse label "A" and "B", so it is a less predictable naming convention than +/- (which a few vendors also reverse label!) So make sure you try swapping the +/- (A/B) if you cannot communicate. Note: "A" is often "-" and "B" is often "+". This discussion covers at least the following Digi Products: ![]() This Wiki page directly covers products which use a standard DB9 serial port (a DTE or PC-like port). The PDF is here: Document 90000253_E as-of Sept-2009 Those which do support selectable RS-422/485 refer to this as Multi-Electrical Interface or MEI.ĭigi Support has an official document that covers EIA-232/422/485 in general, which is document 90000253 and titled Cable Guide Including all PortServer TS, Digi Connect, and Digi One Products. Not all Digi products support RS-422/485 some support RS-232 only. RS485 DB9 on Connect Products Using RS-485 on the DB9 port of Digi Connect / ConnectPort Products
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |