The SD500-PS is a single action addressable fire pull station, and the SD500-PSDA is a dual action addressable fire pull station. The SD500-PS/PSDA features rugged metal construction. A terminal strip on the back of the pull station allows interconnection of the pull station to the SLC of an IntelliKnight control panel. The SD500-PS and SD500-PSDA are single-action or dual-action addressable manual fire alarm pull stations for use with Silent Knight’s IntelliKnight fire control panel. Extremely easy to operate, the SD500-PS/PSDA provides a fast and practical means of manually initiating a fire alarm signal. The IntelliKnight panel recognizes each manual pull station by its specific address, saving precious seconds in determining the location of an alarm. The SD500-PS/PSDA mounts to a single gang box and features a rugged metal construction that lasts and lasts. Combine all this with the features you’ve come to expect from Silent Knight – easy installation and stable operation – and it adds up to a flexible solution for all your fire protection needs.