DSDI 110N Repeated Fault Condition on Shutdown Node.

Hi Stefan,

We have Advant Safeguard 410 node having DSDI 110N IO card in redundant configuration. In past month we have experienced repeated IO board error on two nodes (31/32redundant). We have checked the field side for all 31 devices connected to it, wiring and everything seems OK. We also replaced both IO cards but fault appear again after 5 6 days. Sometimes the fault is on side A sometimes side B card. Every time reseating the card resolved the issue.
Recently side A card went into fault twice in same day and we observed that MMXC3 faceplate for side A continued to show IO error even after fault was cleared and system status views in 800xA explorer showed everything normal.
We also checked online builder system log, there were no messages.
Kindly help with this. What should we be looking at.