I've been working in the automation industry for about 6 months now and have learned quite a bit, but one major weakness I still face on almost a weekly basis is my failure to really grasp the concepts of relays and how different signals interact with them. It's actually quite embarrassing to troubleshoot for two hours only to reach a relay and get completely stumped.
With all that said, I'm looking for any comprehensive books, articles, videos, or any of the like on types of relays, how to read them, fundamental concepts, practical applications, etc. Basically, I'm tired of being stumped by them and need some help getting information.
Any feedback is greatly appreciated.