Lathem Sonachron DWA-S User Manual
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Page 2INTRODUCTIONThe DWA-S is a single circuit signaling device which can beused as a bell ringer or on/off controller. It is capable of retainingup to 1440 separate events for each day of the week in memoryplus a floating lunch and break schedule which can be activatedwith a single key on the keypad or a remote switch. Automaticadjustment for daylight savings time change is also provided. Aliquid crystal display on the front of the unit displays the currenttime (in 12 or 24 hour format), date, and day of the week, bell oron/off control status, programming prompts, and indication ofoperation on standby power. A 24-button keypad is used forsetting time, programming events, manual operation of bells orcontrols, initiating lunch or break bells, and on/off control of theschedule. Access to programming functions and manual keys(MANUAL, START LUNCH, and START BREAK) is controlled bya user defined security code.The time keeping ability of the DWA-S is dependent on thepower source frequency. A switch setting selects operationbased on 50 or 60 Hz. During A.C. power failures, the unitswitches to a quartz crystal time base and a 6 volt battery allowsthe unit to continue to keep time and retain all data for 10 days.Upon power resumption, the battery automatically recharges withcurrent limited to 1.5 Amperes. |
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