Re: Relay used with DSC PC3000

[Jim <alarminex@xxxxxxx>]

On Aug 13, 8:34=EF=BF=BDam, Frank Olson
<use_the_email_li...@xxxxxxxxxxxxxxxxxxxxxx> wrote:
> mleuck wrote:
> > On Aug 12, 4:38 pm, Jim <alarmi...@xxxxxxx> wrote:
> >> I have an old DSC PC3000 panel that I took over lots of years ago.
> >> There's a relay module in it that I now want to use to trip a radio.
> >> The relay looks like it's tripped from the bell output and can provide
> >> two steady outputs to the radio from the steady burg and pulsing bell
> >> outputs of the panel.
>
> >> I know it's old stuff but does anyone have a link to the installation
> >> instructions for the relay (if it still exists) or can tell me what
> >> color wires go to which terminals on the panel in order to obtain the
> >> two steady outputs?
>
> >> Thanks
>
> > That sounds like a PC-16 output board, it should have 16 terminals
> > correct? Give me an email address and I'll send you what I have
>
> Nope. =EF=BF=BDIt's a simple relay. =EF=BF=BDHe's going to have to replac=
e it with a
> twelve volt relay that's got two sets of contacts. =EF=BF=BDI'm not sure =
what
> the current relay's hooked up to, but if it's the hokey one that
> Tried/DSC normally supplies it's only got one set of normally
> open/normally closed contacts. =EF=BF=BDHe could disconnect them and use =
a meter
> to determine which is which.-

No .... you can't use a standard relay for the pulsing output. The
radio needs a steady input to trip. This relay converts the pulsing
output to steady.  I could use a standard relay but I'd have to put a
whopping capacitor across the coil to hold it in while the voltage was
pulsing. Or, I could tell the customer in the event of a fire, hold
these two wires together until everyone is out of the house.