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Stupid question

J

JohnO

Jan 1, 1970
0
Is it or isn't it....I recently ran across a test question that said, and I
think I remember it exactly:

Where do you put an EOL resistor on a circuit that uses NO sensors.

in series at the panel
in parallel at the panel
in series at the last sensor
in parallel at the last sensor


There is no series/parallel here...just put the resistor across the two
circuit screws and that's it. I know my electronics, but this one is making
my head hurt. It could be a bad question, one that some goof wrote and
didn't get reviewed properly.

Thanks!

-John O
 
B

Bob La Londe

Jan 1, 1970
0
in parallel at the last sensor

ie... Class B fire.
 
D

Doug

Jan 1, 1970
0
I'm assuming that you realise that "NO sensors" means Normally Open sensors,
not "no sensors" as in none, nada, zero, zip etc.

The EOL resistor should be in parallel at the last sensor

Doug.
 
J

JohnO

Jan 1, 1970
0
Doug said:
I'm assuming that you realise that "NO sensors" means Normally Open
sensors, not "no sensors" as in none, nada, zero, zip etc.

LOL, whoops. I hope this doesn't mean I gotta tell my kids that NO does not
mean no. :)

Thanks.

-John O
 
J

JoeRaisin

Jan 1, 1970
0
JohnO said:
LOL, whoops. I hope this doesn't mean I gotta tell my kids that NO does not
mean no. :)

Thanks.

-John O

I been playing with these things for six years now and you know I read
it that way the first time too. Just assumed they were being emphatic
about the lack of sensors.

But then none of the answers made sense so I figured I got the question
wrong and read it again - bingo. One of the 'test taking tips' I've
picked up over the years - if the answers are confusing, figure out
exactly what the question is asking.
 
J

JohnO

Jan 1, 1970
0
I'm assuming that you realise that "NO sensors" means Normally Open
I been playing with these things for six years now and you know I read it
that way the first time too. Just assumed they were being emphatic about
the lack of sensors.

Thanks for admitting that. :) In hindsight, this is actually a very good
question.

-John O
 
C

Crash Gordon

Jan 1, 1970
0
or if using 4 cond you could put it on the return in the panel.

anyway you look at it though they are a PITA to troubleshoot.

--
**Crash Gordon**

| in parallel at the last sensor
|
| ie... Class B fire.
|
|
| | > Is it or isn't it....I recently ran across a test question that said,
and
| I
| > think I remember it exactly:
| >
| > Where do you put an EOL resistor on a circuit that uses NO sensors.
| >
| > in series at the panel
| > in parallel at the panel
| > in series at the last sensor
| > in parallel at the last sensor
| >
| >
| > There is no series/parallel here...just put the resistor across the two
| > circuit screws and that's it. I know my electronics, but this one is
| making
| > my head hurt. It could be a bad question, one that some goof wrote and
| > didn't get reviewed properly.
| >
| > Thanks!
| >
| > -John O
| >
| >
| >
|
|
|
| --
|
|
 
B

Bill

Jan 1, 1970
0
I suppose it should be N.O., but I frequently see NO or NC.

Then I always have the question with things like relays, what is normal? Is
it normal for the relay to be energized? Or not energized?
 
J

Jim

Jan 1, 1970
0
I suppose it should be N.O., but I frequently see NO or NC.

Then I always have the question with things like relays, what is normal? Is
it normal for the relay to be energized? Or not energized?

NOT energized, for a relay.

Unfortunately, the alarm industry confused things like this by not
stadardizing on what is "normal" for a magnetic contact.
 
D

Doug

Jan 1, 1970
0
It wasn't a stupid question, it was just stupid to ask it here and expect a
straightforward answer

Doug

--
 
C

Crash Gordon

Jan 1, 1970
0
I do 2 wire smokes like that...4 cond home runs, eol in panel, less labor
for me.



--
**Crash Gordon**

| | > or if using 4 cond you could put it on the return in the
| panel.
|
| I have done that.
|
| >
| > anyway you look at it though they are a PITA to troubleshoot.
| >
| > --
| > **Crash Gordon**
| >
| > | > | in parallel at the last sensor
| > |
| > | ie... Class B fire.
| > |
| > |
| > | | > | > Is it or isn't it....I recently ran across a test question that
said,
| > and
| > | I
| > | > think I remember it exactly:
| > | >
| > | > Where do you put an EOL resistor on a circuit that uses NO sensors.
| > | >
| > | > in series at the panel
| > | > in parallel at the panel
| > | > in series at the last sensor
| > | > in parallel at the last sensor
| > | >
| > | >
| > | > There is no series/parallel here...just put the resistor across the
| two
| > | > circuit screws and that's it. I know my electronics, but this one is
| > | making
| > | > my head hurt. It could be a bad question, one that some goof wrote
and
| > | > didn't get reviewed properly.
| > | >
| > | > Thanks!
| > | >
| > | > -John O
| > | >
| > | >
| > | >
| > |
| > |
| > |
| > | --
| > |
| > |
| >
| >
|
|
|
| --
|
|
 
J

JohnO

Jan 1, 1970
0
It wasn't a stupid question, it was just stupid to ask it here and expect
a straightforward answer

LOL, I've been lurking long enough to expect that! And it beats some of the
other recent thread topics. ;-)

-John O
 
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