I would go with the 525. They are the new kid. If you look at the comparison chart for they you will see that the 525 does everything the 40 do plus some. Looking at dollars the 40 with comms cards cost more.
I have 4 525's on my bench to replace some 160's in very bad need but in a cramped panel.
I really like them but the software still leaves much to be desired IMHO. I used it at automation fair and it's much bwetter now but sill lots of room for improvement. YMMV
Plckid dud yiu get the 160 backplane adapters for those 525? Keep tge same wiring as the 160
Is it just me or does anyone else find it a little bit eerie how long the silver series site has been shut down?
I do have a question about my tags, for example I have Drive1 and Drive2. if I expand them in the tag monitor, i have Drive1:I.DriveStatus Integer. does anyone know how to find out what each bit is?