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    readykilowatt's Avatar
    readykilowatt Posts: 9, Reputation: 1
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    #1

    Apr 7, 2010, 01:09 PM
    End of line resistor
    Does anybody know what an end of ljne resistor does in a fire alarm system?
    tkrussell's Avatar
    tkrussell Posts: 9,659, Reputation: 725
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    #2

    Apr 7, 2010, 01:12 PM
    If you use the Search tool, you will find this:

    https://www.askmehelpdesk.com/electr...rs-274767.html
    stew_1962's Avatar
    stew_1962 Posts: 255, Reputation: 10
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    #3

    Apr 11, 2010, 06:48 PM

    It is used to induce a trickle current in the alarm loop. That way, the alarm panel can detect the wire being loose, broken, or melted during a fire and trip the alarm.
    Stratmando's Avatar
    Stratmando Posts: 11,188, Reputation: 508
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    #4

    Apr 12, 2010, 05:35 AM

    The Resistor used as an end of line resistor is needed to show an intact circuit, without it, if you had a short, open or fault across the pair, it would not be seen without the resistor. It MUST be within a couple of hundred ohms(more or less depending on Panel) or it will show as a fault.
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