DSC FSA-410AST Smoke Detectors

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I was looking at the specs for the DSC FSA-410AST smoke detector today, as  
I have a customer who needs his 8 smokes replaced on a DSC 5010.  I was con
cerned about moving them to a PGM to allow for keypad reset, as it may not  
provide enough current.  I was a bit surprised to find the following:

Maximum Standby Current: 12?A@12 or 24 VDC
Maximum Alarm Current: 25mA - 90mA

The maximum alarm current depends on which specific model you're looking at
, and they have a chart for that... so that's fine.

However... 12?A of standby current?  Really?  That means I could power
 25,000 smokes on a 300mA PGM output.  This sounds like a typo to me.  Perh
aps it was supposed to be 12mA?

Either way, it looks like 8 smokes on a PGM will be fine.

- Chris

Re: DSC FSA-410AST Smoke Detectors
On Tuesday, August 20, 2013 6:30:03 PM UTC-4, Chris wrote:
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s I have a customer who needs his 8 smokes replaced on a DSC 5010.  I was c
oncerned about moving them to a PGM to allow for keypad reset, as it may no
t provide enough current.  I was a bit surprised to find the following:
Quoted text here. Click to load it
at, and they have a chart for that... so that's fine.
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er 25,000 smokes on a 300mA PGM output.  This sounds like a typo to me.  Pe
rhaps it was supposed to be 12mA?
Quoted text here. Click to load it

Standby current really is that low on many smokes  not a typo problem is wh
en they go in alarm and more than one does  to make sure there is enough cu
rrent to handle it.

Re: DSC FSA-410AST Smoke Detectors
On Wednesday, August 21, 2013 4:41:45 AM UTC-7, NickMark wrote:
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 as I have a customer who needs his 8 smokes replaced on a DSC 5010.  I was
 concerned about moving them to a PGM to allow for keypad reset, as it may  
not provide enough current.  I was a bit surprised to find the following:
Quoted text here. Click to load it
g at, and they have a chart for that... so that's fine.
Quoted text here. Click to load it
ower 25,000 smokes on a 300mA PGM output.  This sounds like a typo to me.  
Perhaps it was supposed to be 12mA?
Quoted text here. Click to load it
when they go in alarm and more than one does  to make sure there is enough  
current to handle it.


Thanks Nick.  I see a lot of old systems that were never planned out well e
nough and end up with issues (like half a dozen 20-watt sirens trying to dr
aw way more power than the panel can give).  Actually, this is one of those
 "problem systems" in another way.  There's a zone expander on the system,  
which is an improvement over most that I see, but the 8 smokes take up only
 2 zones.  I was hoping they were all home run and could be separated, but  
no... they were all daisy chained instead.

This is a DSC 5010, so it's capable of having two more zone expanders and r
unning 32 zones.  There's lots of room in the electrical room where the pan
el is located to add a separate enclosure for the zone expander if needed.  
 And to top it off, this was a prewired building (sometime in the 90's I as
sume).  So why not home run everything and do it properly?

- Chris

Re: DSC FSA-410AST Smoke Detectors

On Wednesday, August 21, 2013 4:41:45 AM UTC-7, NickMark wrote:
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Is this a commercial building in the US?

I don't think the 5010 was ever approved for commercial fire in the USA

Doug  



Re: DSC FSA-410AST Smoke Detectors
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It's an office in BC, Canada.  Around here, dedicated fire systems are rare
ly required or even thought about.  And no, I'm fairly sure a 5010 wouldn't
 cut it as a proper commercial fire system.  I know DSC has/had commercial  
fire systems as well, which I believe was basically a Maxsys panel is a red
 enclosure with red keypads.  If the building was being built these days, t
hings may be different.  I wonder if they get an insurance discount for it  
though?

- Chris

Re: DSC FSA-410AST Smoke Detectors


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Yeah, I think that was the 4020CF with a hokey two line adaptor.  


Re: DSC FSA-410AST Smoke Detectors
On Wednesday, August 21, 2013 9:25:13 PM UTC-4, Chris wrote:
Actually, this is one of those "problem systems" in another way. There's a  
zone expander on the system, which is an improvement over most that I see,  
but the 8 smokes take up only 2 zones. I was hoping they were all home run  
and could be separated, but no... they were all daisy chained instead. This
 is a DSC 5010, so it's capable of having two more zone expanders and runni
ng 32 zones. There's lots of room in the electrical room where the panel is
 located to add a separate enclosure for the zone expander if needed. And t
o top it off, this was a prewired building (sometime in the 90's I assume).
 So why not home run everything and do it properly? - Chris

I'm assuming that these are two wire smokes.  

I just thought i'd mention that you might be able to run one 4 wire to the  
right point .....  and break this into 4 zones with two smokes each.

Re: DSC FSA-410AST Smoke Detectors
On Thursday, August 22, 2013 9:36:30 PM UTC-7, Jim wrote:
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a zone expander on the system, which is an improvement over most that I see
, but the 8 smokes take up only 2 zones. I was hoping they were all home ru
n and could be separated, but no... they were all daisy chained instead. Th
is is a DSC 5010, so it's capable of having two more zone expanders and run
ning 32 zones. There's lots of room in the electrical room where the panel  
is located to add a separate enclosure for the zone expander if needed. And
 to top it off, this was a prewired building (sometime in the 90's I assume
). So why not home run everything and do it properly? - Chris
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e right point .....  and break this into 4 zones with two smokes each.

Nope... they're all 4-wire smokes.  Some of them so old that I'd never seen
 them before.  The generation before the old generation of DSC smokes.  Mos
t likely original to the building (prewired and all), and I think that buil
ding has been there most of my life.

- Chris

Re: DSC FSA-410AST Smoke Detectors
On Friday, August 23, 2013 2:46:59 AM UTC-4, Chris wrote:
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 August 21, 2013 9:25:13 PM UTC-4, Chris wrote: > > Actually, this is one o
f those "problem systems" in another way. There's a zone expander on the sy
stem, which is an improvement over most that I see, but the 8 smokes take u
p only 2 zones. I was hoping they were all home run and could be separated,
 but no... they were all daisy chained instead. This is a DSC 5010, so it's
 capable of having two more zone expanders and running 32 zones. There's lo
ts of room in the electrical room where the panel is located to add a separ
ate enclosure for the zone expander if needed. And to top it off, this was  
a prewired building (sometime in the 90's I assume). So why not home run ev
erything and do it properly? - Chris > > > > I'm assuming that these are tw
o wire smokes. > > > > I just thought i'd mention that you might be able to
 run one 4 wire to the right point ..... and break this into 4 zones with t
wo smokes each. Nope... they're all 4-wire smokes. Some of them so old that
 I'd never seen them before. The generation before the old generation of DS
C smokes. Most likely original to the building (prewired and all), and I th
ink that building has been there most of my life. - Chris

Well ...... OK then ...... TWO four wires run to the right spot.

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