I'm surprised you'll able to run a cabinet without Red Fail Monitoring. I'd never be able to get a cabinet to even pass the in shop inspection if it didn't do that
You are correct!The early CMU/pre-NEMA monitors only did such that.I believe the early units did not have a voltage monitor or a phase check function.I knew someone a few years back who had an old LFE monitor.That one only read walk/green outputs.