text: <s>[INST] Looking for serial comm module to add two serial ports to 1756 system I have looked all over and I can not find a two port RS-232 serial interface card for my 1756 Contrologix system. Can anyone help? [/INST] Try to search HERE ... Prosoft is a Rockwell Automation Encompass Product Partner I suggest the MVI56-GSC or the MVI56E-GSC Hope this helps… - fuzzy logic \\n </s>