Re: CP400 power supply ?

[nick markowitz <nmarkowitz@xxxxxxxxx>]

On Nov 27, 11:12=A0pm, Jim <alarmi...@xxxxxxx> wrote:
> On Nov 27, 5:39=A0pm, nick markowitz <nmarkow...@xxxxxxxxx> wrote:
>
> > Have an older CP400 Pyrotronix fire panel 80's vintage I tried to hook
> > a 24 VDC Co detector to and it started chattering. I am thinking the
> > power supplied by that older panel is unregulated DC and that's why Co
> > does not like it. Sound right?
>
> Could be an AC panel. Didn't some of the old fire panels used to be AC?

This one is definitely DC but early panels offered filtered and
unfiltered AC  and some times both. the unfiltered was for door magnet
holders which did not need clean DC how ever this output says 24 Dc
but not what quality it is.