Alarm Dialler

[luggsey]

Had the debate before but as far as I'm concerned, if battery standby is accounted for then i can't see any issues in using the panel's 24volt auxillary output (providing it's fused) to power local equipment such as an autodialler, whether mounted in the fire panel or bolted next to it.

Wouldn't advocate putting door magnets on it, but think that the competent design engineer should have the ability to make a judgement call on whether an item of equipment is suitable to be powered direct from the panel or not.

As with most things today, it's ok until it goes wrong......

I always fit a PSU for a dialer and that's what has always been spec'ed on the larger jobs I have been on.

The aux 24v is for control relays as far as I am concerned, and they should be inside the panel IMO.

The thing that bugs me is why in this day and age of Euro regs BS/EN etc etc why can't we have a standard plug on dialer for fire alarms like the ones we used to have on Tann/Menvier panels.

[arfur mo]

As with most things today, it's ok until it goes wrong......

I always fit a PSU for a dialer and that's what has always been spec'ed on the larger jobs I have been on.

The aux 24v is for control relays as far as I am concerned, and they should be inside the panel IMO.

The thing that bugs me is why in this day and age of Euro regs BS/EN etc etc why can't we have a standard plug on dialer for fire alarms like the ones we used to have on Tann/Menvier panels.

hi luggsey,

funny enough i was think along those lines to, and was going to pose the question.

Scantronic also had the plug on Tx pins and i think a few others had them to, and you could get an adapeter for connecting a stand-a-lone dialer or stu.

what seemed a strange rule in intruder to me was, transmitter if stand alone had to be in its own tampered box on its own supply, yet build it into the panel as with gardtec or use it plug on it's ok. i reason if the main cpu box is big enough whats the difference?

but there's some seemingly odd idea's out there, and i bet there will be an obscure explanation to justify it along shortly

kit getting smacked by lightning used to be very common when i worked for firms like chubbs and honeywell. but since i've been on my own i have had very few hits, i'd say about 5 over the years which knocked out some 9100's and and 2 x Ultimate's. so either the design has improved or the move to plastic bell box's in the alarm trade has helped reduced strikes down the outside bell cables imo.

regs

alan

[Guest anguscanplay]

what seemed a strange rule in intruder to me was, transmitter if stand alone had to be in its own tampered box on its own supply, yet build it into the panel as with gardtec or use it plug on it's ok. i reason if the main cpu box is big enough whats the difference?

and i bet there will be an obscure explanation to justify it along shortly

regs

alan

simply that there is no requirment for seperate power supply, was good practice but gradings now made it impossible to do anyway

cheers

A.

[arfur mo]

simply that there is no requirment for seperate power supply, was good practice but gradings now made it impossible to do anyway

cheers

A.

hi angus,

early days of that rule (from what i remember of never reading them regs ) you had to have a battery in the tx's box with it to support the tx independently of the panel supply, thats why i and i think most fitted a psu as a 'solid' compliance option.

if you ran a cable from the panel aux it could be shorted and killing both units due to the fusing at both ends (assuming they were fitted ), and you would also be asking the charger to handle more batteries than designed for, also you needed to make both batteries the same size so one did not starve the other due to the voltage drop across the cable feeding the tx etc.

it just went on and on so like you say, might not have been totally needed for regs compliance.

has this reg all been dropped then? as you can get gardtec modems and digi's in those small surface j/b boxes with no chance of ever fitting a battery.

regs

alan