A building being developed I've visited is a candidate for having an addressable system covering it all (currently two separate conventionals and some areas with nothing)
Now one of the existing systems is very new and doesn't really need to be addressable (small zones to search, liberal use of remote indicators). I'm aware of course of the use of zone monitors and sounder drivers on the loop to allow the retention of conventional zones, but this system is twinwire (Cooper Menvier bi wire) so I'm not sure you can use a zone monitor as the way it works is completely different to a zone on a 4 wire.
Can it be monitored off the loop or does it need:
- to retain the panel and interface via this
- to retain the cables only and turn the zones into a spur off the loop by replacing all the field devices with addressable and the requisite isolators?
Now one of the existing systems is very new and doesn't really need to be addressable (small zones to search, liberal use of remote indicators). I'm aware of course of the use of zone monitors and sounder drivers on the loop to allow the retention of conventional zones, but this system is twinwire (Cooper Menvier bi wire) so I'm not sure you can use a zone monitor as the way it works is completely different to a zone on a 4 wire.
Can it be monitored off the loop or does it need:
- to retain the panel and interface via this
- to retain the cables only and turn the zones into a spur off the loop by replacing all the field devices with addressable and the requisite isolators?