Edwards Signaling 5520D-AW 5520D Series Duotronic Horn Siren SF 05/02 This means you can retrofit

This means you can retrofit an existing building and use existing conventional devices

the Edwards Est SIGA-PHS intelligent detector constantly runs self-checks to provide important maintenance information

Main Annunciator Chassis and one RAX-1048TZDS Adder Annunciator Chassis

Extensive transient protection

Edwards Signaling 5520D-AW 5520D Series Duotronic Horn Siren SF 05/02 This means you can retrofitEdwards D2 Class devices are low current, high performance, high decibel audible signals which may be coded from an external source or used as a continuous alarm. They are designed to function as either a horn or siren by setting an internal, tamper proof switch. The 5520D is primarily intended for use in applications requiring electrical supervision of signaling circuit field wiring. These signals may also be used for unsupervised signaling