IDEC SMARTRELAY User Manual page 174

IDEC SmartRelay functions
4.4 Special functions list - SF
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 surrounding temperature, and is typically 80 hours at a
surrounding temperature of 25 C.
Sample configuration
The output of an IDEC SmartRelay is to be set annually on March 1, reset on April 4, set
again on uly 7, and reset again on November 19. ou need to configure two twelve-month
time switches with corresponding on-times, then logically link the outputs by means of an OR
block.
Result
162
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IDEC SmartRelay Manual