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DSC Polarity-Riversal Module

The PRM series modules are Polarity-Riversal modules for use with the FSA-410BST 4 wire smoke detector with integral sounders. These modules provide a tandem connection such that when one smoke detector goes into alarm it signals the PRM module to reverse the polarity of the power to the connected smoke detectors. Upon power polarity reversal all connected smoke detectors will sound their integral horn. (Only works with FSA-410BST Smoke Detectors)
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