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Can someone identify the model number to this switch or one that would be compatible.

I have a question regarding to making some changes on a est-3 system regarding message changes and adding devices into service group. After I have made my changes which are the next steps.

Anybody?

Hello can someone be more detailed about the smoke detector spacing. I understand 0.7 times listed spacing will tell you the radius or coverage of the smoke detector... I need a formula for different type of rooms rectangle or octagon shaped rooms how does the calculations change. how else does it c...

I have a question and help will be deeply appreciated. Im trying to use two mr-201 relays for fan restart and theater projection shut down. Im getting my 24 volts off the aux panel on the facp. how would I go about wiring up?

Im new so apologize for the noob question im about to ask. Okay on a est-3 panel I was a ground fault on the nac4 circuit. So I took nac4 wire off the panel and this is where my question begins. How do you hunt for the groundfault on the strobes. On my meter what readings should I get on my meter if...

I know this might sound like a stupid question, but Im going to shoot anyway. Can anybody explain whats communication + -, Data + -, Power + -, NC C Com K2 K. The loops I see in the diagrams I see it says Data Loops, but what are they exactly? Thanks for the help and sorry I just did not where else ...

DAMMIT! I printed out the first one I got a light reading session in, but I just saw the workbook you just uploaded way more understandable thanks again LEO for the information.

Thanks leo, In the company I work for they deal mostly with est3's and io500 panel. Is it hard to understand by just reading? I was reading the manual for the est3 it was kinda hard to understand without looking at a panel already hooked up. I appreciate it though and I will give the link a read.

Any tips will be helpful.