Apparatus and method for detection and adaption to an end-of-line resistor and for ground fault localization
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United States of America Patent
Stats
-
Jan 30, 2018
Grant Date -
Feb 26, 2015
app pub date -
Aug 11, 2014
filing date -
Aug 21, 2013
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An apparatus and method for detection and adaption to an end-of-line resistor in a notification appliance circuit (NAC) of a control panel or power booster of, for example, an alarm system, and for ground fault localization in the alarm system are provided. The apparatus can include the NAC where the NAC includes first and second analog input terminals, where the NAC includes first and second external output terminals, and where the NAC includes an end-of-line resistor. Current can be driven through the NAC via the first and second analog input terminals, and voltage can be measured at each of the first and second external output terminals. The measured voltage can be indicative of one of a value of the end-of-line resistor or that a state of the NAC is one of open, shorted, ground faulted, or normal.
First Claim
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International Classification(s)
- 2014 Application Filing Year
- G08B Class
- 2420 Applications Filed
- 2168 Patents Issued To-Date
- 89.59 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- G08B Class
- 0 % this patent is cited more than
- 7 Age
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