End Of Line Terminating Resistor, Or Module, On Older Interconnected Smoke Detectors ?

[Robert11]

Hello:

For you "old timers" out there (meant as a compliment):

Did older wired-in smoke detectors that were interconnected ever use or
require, an
end-of-line terminating resistor ? How about an end-of-line module, of
some sort ?

Details on, if so ?

Was wondering if my interconnect problem, described in a few of my recent
posts, might be that these items are hidden away somewhere on the
interconnect line ?

Thanks for all the help,
Bob

 

[Crash Gordon®]

For alarm system smokes, not for electrician smokes.

 

[Robert L. Bass]

For you "old timers" out there (meant as a compliment):

Who are you calling old, you young whippersnapper?!?

Did older wired-in smoke detectors that were
interconnected ever use or require, an end-of-line
terminating resistor ? How about an end-of-line module, of some sort ?

That depends on how old the system is. Some systems we worked on in the
late 70's didn't require an EOL resistor on fire alarm loops.

--

Regards,
Robert L Bass

=============================>
Bass Home Electronics
2291 Pine View Circle
Sarasota · Florida · 34231
877-722-8900 Sales & Tech Support
http://www.bassburglaralarms.com
=============================>

 

[Anonymous]

Robert11 asked:

For you "old timers" out there (meant as a compliment):

Did older wired-in smoke detectors that were interconnected ever use or
require, an
end-of-line terminating resistor ? How about an end-of-line module, of
some sort ?

Details on, if so ?

From what I recall of your earlier question, it had to do with
interconnected 120 VAC smoke detectors, not system smoke detectors. I have
never seen a 120VAC smoke alarm with an EOL, since the EOL would serve no
purpose. I'd suggest you remove all the smokes, all the power, and
troubleshoot the wiring. Then replace one unit at a time to see when the
problem reoccurs.

If you're asking about old-time system smoke detectors, they were all
four-wire smokes, as far as I recall. However, some of the smokes had
internal end of line relays. In other words, each smoke had four circuit
wires forming what you might call an "A" loop and a "B" loop. A relay
inside each smoke would place an open on the "A" loop if power to the smoke
was disconnected. Manufacturers soon realized that a single relay at the
last smoke served the same purpose, and cost less.

- badenov

 

[Group Moderator]

That depends on how old the system is. Some systems we worked on in the
late 70's didn't require an EOL resistor on fire alarm loops.
Regards,
Robert L Bass

Mike Said:
Any require Dual Battery Diode Harnesses? As you wrote.


Battery Diode Harness StoryFrom: [email protected] (Group Moderator)
Newsgroups: alt.security.alarms
Subject: REPOST: Battery Diode Story - GOOFY BASS WRONG AGAIN
Lines: 89
NNTP-Posting-Host: ngpost-m2.news.aol.com
X-Admin: [email protected]
Date: 22 May 2002 07:13:17 GMT
Organization: AOL http://www.aol.com
Message-ID: <[email protected]>


REPOSTED FOR THOSE WHO REQUESTED IT:
This is the guy ROBERT L. (Lunatic) Goofy Bass that his Clones think he is
so
knowledgeable about alarms.
*******************************************************************************

Battery Diode Story

Bass Was Totally Wrong - This was taken right from www.google.com
Subject: Re: Connecting more batteries
Newsgroups: alt.security.alarms
Date: 2002-04-08 07:38:27 PST

> > > >

I think you've got this one wrong, friend. Napco provided a Battery Diode >

Harness for use on their MA-3000 panels for years. I've used them to wire

when > > > > I installed their add-on power supply. In fact, it's still
listed
on the > > > > ADI server as a valid part, although AFAIK Napco has stopped
producing them. > > > > > > > > If you make current flow in the wrong
direction
on a battery charging > > > > circuit you'll have a lot more than a dead
battery to worry about. To test > > > > your theory take a discharged
battery
and connect its terminals to another, > > > > fully charged battery with the
terminals reversed (so you can get current to > > > > "flow back into the
dead
battery"). All kidding aside, don't really try > > > > this. The results can
include fire and explosion, depending on the type of > > > > battery and its
condition. > > > > > > > > BTW, the charging circuits on many alarms are
actually 13.8VDC -- not 12 > > > > Volts. > > > > > > > > Regards, > > > >
Robert L Bass > > > > > > > > =============================> > > > > Bass
Home
Electronics > > > > The Online DIY Alarm Store > > > >
http://www.Bass-Home.comSales & Tech Support > > > > 941-925-9747 Fax > > > >
[email protected] >
This is the CORRECT answer
Again taken from www.google.com

> > > Sorry, Robert,
but it looks like you have this one wrong on two counts > > > and Nomen
Nescio
is right on the money. Like you, I have also done > > > countless
multiple-battery MA3000 commercial fire and burg installs > > > over the
years.optional PS3000 power supply, but do need to supervise for AC > > >
brownout.
This module connects the PS3000 jack to the AUX relay, which > > > is
triggered
upon brownout. > > > > > > Secondly, the Dual Battery Harness, to which I
believe you were > > > referring in your post, does not have a diode in it
at
all, it simply > > > parallels the battery leads to allow the connection of
2
or more > > > batteries to the MA3000, or any other panel. > > > > > > I do
not
think UL would require a diode in the battery harness that > > > would waste
a
valuable 0.7 VDC in a low battery condition just to > > > protect against
the
installer reversing the battery leads > > > accidentally. There is already a
thermal circuit breaker on the board > > > for this type of protection. > >two directions, you will soon have a very dead battery. > > > > > > Best
Regards, Oleg

HERE NORMAN PROVES GOOFY ASS WRONG ALSO

Nomen Nescio wrote: > > > > > > > > > > Better not use a diode to isolate
the
two batteries. Remember, current has > > > > > to flow both directions on a
battery lead: into the battery when it's > > > > > charging, and out of the
battery when it's discharging. So if you orient > > > > > the anode towards
the
charging terminal and the cathode towards the > > > > > battery, the battery
will charge but will not be able to deliver power to > > > > > the system
when
the AC is off. If you orient the diode the other > > > > > direction, the
battery will not charge. > > > > > > > > > > Diodes also have a 0.6 volt
drop
across them, so if you charge a battery > > > > > through a diode, you are
not
getting the full charging voltage. > > > > > > > > > > Use a fuse or circuit
breaker instead, preferably the harness provided by > > > > > the panel
manufacturer.

SO those who want to take Goofy Bass's advise because you think he knows
every
thing -THINK TWICE.

Visit The Goofy Bass Website
http://www.goofysplace.com/