The DS-Series is similar in size and appearance to our DA-series annunciators. Unlike the DA-series, the DS-series is suitable for use as an inexpensive door status panel. This unit is for N.O. circuits only and the inputs are non-latching. The monitored door contact must be open when the door is closed. The contact must close to initiate an alarm when the door has been opened. A door violated alarm is indicated by a red LED lighting behind the respective zone label.
The unit operates from 12 or 24 vdc. An ordinary 500ma. outlet-mounted power supply is satisfactory for use with the DS-series. For more dependable performance, use a filtered, regulated power supply with battery backup. A pair of wires are required from each monitored contact to the DS-series annunciator. A sonalert provides audible alarm notification.