Thanks for the input, guys. I finally got to go back to the job today and took some of your suggestions into play. So the inputs on the FIB, that triggers emergency service is 120VAC. I used some monitoring relays for that and it checked out. The RSL power distribution is 12VDC. I noticed that every time it triggered an SES, my RSL to my FIB was roughly 8-9VDC. I tracked down the supply that feeds the FIB and found my CAP7 and R7 is where I lost my volts. Lo and behold, I found a loose connection from the + of my CAP. I'm assuming when that big ass contactor picks and drops it rattled that connection - sometimes a good connection, and sometimes not. I tightened it down and it has been going non-stop. Fingers crossed it stays that way
