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The Plena Voice Alarm System employs a simple and easy to use method of loudspeaker surveillance based on impedance measurement. On long wire runs, external influences, such as cable capacitance and speaker impedance, can negatively influence the reliability of the measurements. The dummy loads provide a filtered load exclusively at the pilot tone frequency. This greatly increases the dependability of impedance measurements, providing reliable break or short circuit detection, even on long wire runs.
Feature
Model
LBB 1999/00 Plena Voice Alarm System Remote Control Extension Kit
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LBB 1998/00 Plena Voice Alarm System Remote Kit
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LBB 1997/00 Plena Voice Alarm System Remote Control Extension
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LBB 1996/00 Plena Voice Alarm Remote Control
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LBB 1995/00 Plena Voice Alarm System Fireman's panel
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PRS‑FIN, PRS‑FINNA and PRS‑FINS Fiber Interfaces
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