So I talked with my school district’s head fire alarm tech, and evidently our building’s NFS-3030 has 2 out of 6 slc loops dead. One of the LCM cards, and its associated lem card has kicked the bucket. Has anyone else seen these fail? Just want to know how common this is.
I have worked with both of those loop cards for years and can’t say that I recall ever having a bad one.
Well from the data sheet on those cards, in the NFS-3030 the 1 LCM card and 1 LEM card can be paired up, and you can have up to 5 of these pairs. So I am guessing that the control card went out, and the associated extension card is just sitting there without an understanding of what it is supposed to do.
I should also mention that for some reason the tech didn’t inform our building engineer of the scope of the issue, so that is a bit weird.
It would be easy enough to test your theory on the bad loop card by swapping it out with one of the other known good ones. The DATA IN and DATA OUT wiring ports are important too. He shouldn’t have left the system in that condition without notifying someone. There’s potentially a lot of protection not working.
The system was fixed a day later.