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UL 636 Ed. 11-2018
Standard for Holdup Alarm Units and Systems - Published Date: January 30, 2018
These requirements cover holdup alarm systems of the remote-station type intended for installation in banks, stores, cashiers’ cages, pay offices, and the like to provide a means of transmitting a silent call for help in the event of interior robbery. These systems are divided into the three classes listed in 1.2 and are de ned under Extent of Protection, Section 90.
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Underwriters Laboratories [ul]