Posted 25 Nov 2019 (edited) Genst, Could You please advise how can I connect to CJ1M CPU12 - shown in attached picture. DB9 port is used for communication with remote input/outpus rack. There is this small portabove DB9, but first I don't know what cable should I use and seconde I don't know if it is possible to usi this port when PLC talks on DB9 with remote input/output rack. I want to connect to CX-programmer to be able to online troubleshoot PLc program. thanks in advance. tomasz Edited 25 Nov 2019 by tomasz_m Share this post Link to post Share on other sites
Posted 25 Nov 2019 The cable you need is CS1W-CN226. Share this post Link to post Share on other sites