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USP End-of-Line Relay, 12-24VDC


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WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov


Smoke Detector Loop Terminator

The United Security End of Line Relays are used for terminating smoke detector loops for connection to burglar and fire alarm panels. These relays are adaptable to any standard 4 or 6 wire system, and they provide 12-24 VDC E.O.L. power supervision.

United Security – Robust, Rugged, Ready

United Security Products (USP) has supplied quality products to the security alarm industry for more than 40 years, with proven performance in more than 100 million installations. Security systems professionals rely on USP for the most innovative products in the security industry. For your next installation, be sure to specify USP products.


  • MPN: R64
  • Size: 2-3/8 x 2-1/4 x 1 inches
  • Certifications: UL listed and CA State Fire Marshall Approved