Dicon Model 330S (490-0481) Features Faxback Doc. # 9507 The Dicon Model 330S is intended for 4 wire connection to compatible UL listed 12 and 24 volt DC fire alarm units. As each detector incorporates a 85 db piezo ceramic alarm within the unit, it is especially suited for residential applications, including hotels, motels and dormitories where sleeping areas require efficient alarm signal distribution. Each detector is provided with an interconnect capability. When interconnected activation of any one alarm will cause all alarms to sound. Each detector has one form A (SPST-NO) relay contact to activate the alarm initiating circuit in the panel. ADVANCED ENGINEERING FEATURES Four wire low current design -- 12 to 30 VDC or FWR range Dual ionization chamber for fast response to visible particles of smoke. Built-in sensitivity test button checks calibration of individual detector without activating the control panel. Optional interconnect features (12 unit maximum) -- all interconnected detectors will sound if any one unit is activated by smoke. Additionally, all alarms may be activated by applying positive rated voltage (10 to 30 VDC) to interconnect line, either from a control panel or a normally open switch (i.e. manual pull station). Dual power and alarm signalling leads prevent looping of conductors and allow wiring supervision. Solid state alarm indicator lights on unit initiating alarm for ease of troubleshooting -- indicator remains on until reset from control panel. 5 second delay between smoke detection and activation of alarm signalling relay prevents false alarms due to momentary transient conditions. Form A (SPST-NO) relay contact activates alarm initiating circuit in the panel. Universal mounting plate for ease of installation and troubleshooting. Attractive, low silhouette design. Factory sealed unit Two year warranty (ALL-01/18/95)