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INTRODUCTION
The DWA-S is a single circuit signaling device which can be
used as a bell ringer or on/off controller. It is capable of retaining
up to 1440 separate events for each day of the week in memory
plus a floating lunch and break schedule which can be activated
with a single key on the keypad or a remote switch. Automatic
adjustment for daylight savings time change is also provided. A
liquid crystal display on the front of the unit displays the current
time (in 12 or 24 hour format), date, and day of the week, bell or
on/off control status, programming prompts, and indication of
operation on standby power. A 24-button keypad is used for
setting time, programming events, manual operation of bells or
controls, initiating lunch or break bells, and on/off control of the
schedule. Access to programming functions and manual keys
(MANUAL, START LUNCH, and START BREAK) is controlled by
a user defined security code.
The time keeping ability of the DWA-S is dependent on the
power source frequency. A switch setting selects operation
based on 50 or 60 Hz. During A.C. power failures, the unit
switches to a quartz crystal time base and a 6 volt battery allows
the unit to continue to keep time and retain all data for 10 days.
Upon power resumption, the battery automatically recharges with
current limited to 1.5 Amperes. Note: The display will be dimmed
when operating on battery power.