5520D series Duotronic signals are 24 Vdc diode-polarized, heavy duty, high-decibel signaling appliances for use in fire alarm applications where a supervised signal is required. Colored sage gray, 5520D Series signals will function as either a horn or siren by setting an internal tamper-proof switch.
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- UL Listed
- FM Approved Audible Notification Appliances Standard 3151-3152
- Speaker swivels 180° horizontally and 90° vertically
- Horn frequency - 1.1KHz
- Siren frequency - rises and falls from 600 to 1300 Hz every 3 seconds