All APB controllers provide a Real Time Clock
(RTC) that may be used to schedule and control events based on the hour, day,
day of week, month or year.
The APB provides non-volatile storage for up
to 13 counter/timer presets and 64 intermediate relays.
The APB controller will maintain the RTC and
non-volatile parameter storage for ~ 160 hours when power is
The optional battery will extend the back-up time
to ~ 1 year.
The replacement battery used is a