IDEC SmartRelay functions
160 IDEC SmartRelay Manual
Backup of the real-time clock
The internal real-time clock of IDEC SmartRelay is buffered
against power failure. The buffering time is influenced by the
ambient temperature, and is typically 80 hours at an ambient
temperature of 25°C. If you are using the optional IDEC
SmartRelay Battery cartridge, or combined IDEC
SmartRelay Memory/Battery cartridge, IDEC SmartRelay
can retain the clock time for up to two years. To backup the
real time clock for more than 80 hours, insert a battery
cartridge or a combined memory/battery cartridge to the
base module.
Sample configuration
The output of an IDEC SmartRela
y is to
be set annually on
March 1, reset on April 4, set again on July 7, and reset again
on November 19. You need to configure two twelve-month
time switches with corresponding on-times. Then logically
link the outputs by means of an OR block.