Having smokes on multiple zones

[newalarm]

I wanted to get clarification on the issue with having smokes on different zones on the M1G. I am using 4 wire SS smokes, and had hoped to have different zones for the smokes, possibly for different Areas. I know there was an issue with doing this due to the resetting of the smokes by the panel. Can anyone help clarify for me the problems that can come up?
 
Thanks.

 

[apostolakisl]

With 4 wire detectors this isn't such a problem because you have separate control over the power wires and the alarm wires.
 
If you power all of them off of the same voltage source, then when you do a polarity reversal, all of them will sound regardless of what zone they are plugged into (that is how I would do it even if the two zones are in separate structures).  You can reset all of them using the regular method when using one power supply as well with the normal power interruption   
 
If after the reversing relay you split the power and then run the power down two separate sets of daisy chained detectors (following each of the two zones) and put an eol relay + resistor for supervision on each, you will get a trouble code on the one zone or the other zone if you lose continuity on any of the wires respective to that zone.

 

[Del91574]

The inherent issue with running multiple 4 wire smokes on a single panel, assuming they're installed correctly and with a power supervision relay, is that on a reverse polarity (tandem ring) you are going to throw all the zones into trouble or in the case of a fire reset, the same....causing a whole load of events and activity to hit the M1 at once. If monitored, expect the same amount of events to keep the phone (or even cell) tied up for an extended period of time. If you get billed by amount of activity by your CS (some do) it's not a pretty scenario in that case either.
 
If you attempt to separate out the fire reset portion it's going to make the panel more difficult to use for an end user, especially in the case of resetting after a false, necessitating more rules and outputs, assuming you're going to attempt a "reset X detector" only and not a global.

Unless you have a huge install, I would not recommend it personally.