SARGENT Alarmed Exit Hardware The 540 and 550 Series alarms are equipped with a horn which is activated by unauthorized egress or the removal of the cover. The horn, once activated, will sound for two minutes, then shut off automatically and re-arm itself. For More information Downloads Sargent Exit Alarm Catalogue (.pdf, 675 kB) Close Access Control Accessories Sucuritron Power Supply Exit Device SecuritronExit Device Keyswitches/Cylinders KP1 - Tubular Keyswitch SECURITRON Push Buttons