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APPARATUS AND METHOD FOR DETECTION AND ADAPTION TO AN END-OF-LINE RESISTOR AND FOR GROUND FAULT LOCALIZATION
APPARATUS AND METHOD FOR DETECTION AND ADAPTION TO AN END-OF-LINE RESISTOR AND FOR GROUND FAULT LOCALIZATION
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机译：用于检测和自适应终端电阻器以及接地故障定位的装置和方法
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摘要
An apparatus and method for detection and adaption to an end-of-line resistor in a 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 a notification appliance circuit, where the notification appliance circuit includes first and second analog input terminals, where the notification appliance circuit includes first and second external output terminals, and where the notification appliance circuit includes an end-of-line resistor. Current can be driven through the notification appliance circuit 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 notification appliance circuit is one of open, shorted, ground faulted, or normal.
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