S8 Serial Cable

[harryw_45]

Would someone supply me with the PINout of the DB9 end of the 182845B cable when used as RS422 with a 8421 board specifically TxA, TxB, RxA, RxB

[MissyS]

If you go to NI-Serial Help and search for "pin", the pinout for 485/422 can be found. The NI-Serial help is located under Start»All Programs»National Instruments»NI-Serial»NI-Serial Help. Go to the search tab and search for "pin". Then click on DB-9 Connector page. The pinout for a 485 signal will be the same as 422.

Also, the Serial Quick Reference Guide shows this information. Below is a link.

https://www.ni.com/docs/en-US/bundle/serial-feature/resource/371253g.pdf

Regards,

[harryw_45]

What I didn't realize was that TxA is TxD- and TxB is TxD+ and TxA is TxD- and TxB is TxD+. Found this by experementation.