Re: 2,3,4 wire smoke detectors?

["Just Looking" <nospam@xxxxxxxxxx>]

http://fe0wap86.bosch.de/intershoproot/eCS/Store/all/ST_NA/lit1/D285DH_DataSheet_enUS_F2274612363.pdf
As you can see the detectors are not typically stand alone but are part of a
system with notification appliances, remote communications and of course
stand by power.
http://fe0wap86.bosch.de/intershoproot/eCS/Store/all/ST_NA/lit1/D7024FireAlarmC_DataSheet_enUS_F3601474827.pdf

"BoyntonStu" <stu@xxxxxxxxxx> wrote in message
news:1184691560.519204.59050@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> On Jul 16, 10:27 pm, Jim <alarmi...@xxxxxxx> wrote:
> > On Jul 16, 7:07 pm, BoyntonStu <s...@xxxxxxxxxx> wrote:
> >
> > > My smoke detectors have 3 wires coming out of them.
> >
> > > Black, white, and yellow.
> >
> > > Black and white fr 110VAC and the yellow for interconnectivity.
> >
> > > All I see discussed is 2 and 4 wire.
> >
> > > Would someone please unconfuse me?
> >
> > 2 and 4 wire smoke detectors as referred to in this group, are low
> > voltage devices used in alarm installations. The one's you are talking
> > about are 110vac units.
>
> Thanks,
>
> Do low voltage 2 and 4 wire smoke detectors also have battery backup?
>
>