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Stupid question

Discussion in 'Security Alarms' started by JohnO, Dec 4, 2007.

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  1. JohnO

    JohnO Guest

    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
     
  2. Bob La Londe

    Bob La Londe Guest

    in parallel at the last sensor

    ie... Class B fire.
     
  3. Doug

    Doug Guest

    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.
     
  4. JohnO

    JohnO Guest

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

    Thanks.

    -John O
     
  5. JoeRaisin

    JoeRaisin Guest

    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.
     
  6. JohnO

    JohnO Guest

    I'm assuming that you realise that "NO sensors" means Normally Open
    Thanks for admitting that. :) In hindsight, this is actually a very good
    question.

    -John O
     
  7. Crash Gordon

    Crash Gordon Guest

    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
    | >
    | >
    | >
    |
    |
    |
    | --
    |
    |
     
  8. Bill

    Bill Guest

    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?
     
  9. Jim

    Jim Guest

    NOT energized, for a relay.

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

    Doug Guest

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

    Doug

    --
     
  11. Bob La Londe

    Bob La Londe Guest

    panel.

    I have done that.
     
  12. Crash Gordon

    Crash Gordon Guest

    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
    | > | >
    | > | >
    | > | >
    | > |
    | > |
    | > |
    | > | --
    | > |
    | > |
    | >
    | >
    |
    |
    |
    | --
    |
    |
     
  13. JohnO

    JohnO Guest

    It wasn't a stupid question, it was just stupid to ask it here and expect
    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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