Latching trouble output for PC5010

[Ian Macky]

Looks like the PGM 09 System Trouble output on the PC5010 is
non-latching (unlike PGM 10 System Event which *is* latched).

Can someone recommend a simple 12VDC solution to latch PGM 09
until reset? Latching relays typically use a second coil to
unlatch (which has to be energized), but I'd like to use PGM 03
(currently used for latching fire alarms) to reset the PGM 09
latch and that means I'd want to reset when the voltage is
*dropped*, which is not what most latching relays want.

There's probably a way to do this so trivial I can't see it.

Suggestions?

--ian

 

[Jim Rojas]

Did you try the latching strobe option? That should latch until reset.

Jim Rojas

 

[Ian Macky]

Did you try the latching strobe option? That should latch until reset.

Not sure what you mean. What "latching strobe option"? The word
"strobe" only occurs in the PC5010 installation manual in reference
to strobe lights, and for PGM 10, Latched System Event. I want to
latch PGM 09, System Trouble.

--ian

 

[TH]

connect the pgm (09) to a 24 hr zone and then use another pgm for (10).

 

[Ian Macky]

It's hard for me to describe here without a pencil and 2x4, but you can use
a double pole relay wired to latch itself upon trigger. The second pgm set
as resetable power is used as the source/coil power. Resets on loss of
power.

Confused? Me too...

hi, thanks for answering.....

no, that's what i had i mind, a self-latching relay, i'm just having
trouble with the specifics. ancientness....... d'oh!

don't i need a relay with two input coils?

yes, two output poles: one for the light, the other to keep the coil
energized (through resettable power source PGM 03).

but a normal relay has only a single input coil, which i would be wiring
to one of the programmable outputs (set to 09, system trouble).

how could you connect the second pole to the same input coil? you'd be
applying 12VDC to the PC5010 output when the relay latched then, no?

seems like two input coils and two poles would be perfect, but i could
not find such a beast. much gnashing of indexes was there.

thanks again...

--ian

 

[Ian Macky]

connect the pgm (09) to a 24 hr zone and then use another pgm for (10).

....*without* using up a zone?

 

[fly in the ointment]

Ian Macky wrote

don't i need a relay with two input coils?

yes, two output poles: one for the light, the other to keep the coil
energized (through resettable power source PGM 03).

but a normal relay has only a single input coil, which i would be wiring
to one of the programmable outputs (set to 09, system trouble).

how could you connect the second pole to the same input coil? you'd be
applying 12VDC to the PC5010 output when the relay latched then, no?

seems like two input coils and two poles would be perfect, but i could
not find such a beast. much gnashing of indexes was there.

Here's a diagram of how to make a dpdt relay latch:
http://www.altronix.com/p_pdf/RBST.pdf
js

 

[Fosa]

Altronics 6062 timer relay can be used to latch and reset by disconnecting
power.

 

[Fosa]

Sorry that should read "Altronix". If that relay doesn't work then I am sure
they have one that will.
http://www.altronix.com/

 

[Ian Macky]

Hi...

coil to a switchable DC output. I diagram this on one of the pages in my
FAQ website. The URL is in my tag line below.

I looked, but could not find. "one of the pages" was not much of a hint.
There are > 100 pages with keyword "relays", and neither of the references
to "latching" was it.

I posted two JPG images I drew to to illustrate this for
you.

There's no such group as alt.binaries, just various sub-groups. So, not
sure what you mean. Is this JPG on your site? Can you post the URL to it?

Thanks much....

--ian

 

[Ian Macky]

The group has been in existence for a long time. I post
drawings of alarm system components there every so often. Perhaps your
USENET service provider simply doesn't carry it.

ah, i finally found someplace that carried it. seems pretty obscure,
not even google indexes it.

Here are links to three relevant images on my web server:

http://www.bass-home.com/images/faq/LatchingRelay.gif
http://www.bass-home.com/images/faq/LatchingRelay.jpg
http://www.bass-home.com/images/faq/LatchingRelay2.gif

thanks much. what i was missing was the magic of the diode.........

--ian