Beckhoff CU8110-0060 Manual page 37

5. Click on the Configure alarm button and define under Max. time on battery before critical alarm, after
which the critical alarm should be triggered in the event of a power failure. The critical alarm is not
triggered if the power supply returns within the set time.
6. Under Turn UPS off wait time, determine the time after which the UPS should switch off its outputs.
Define a time period in which the industrial PC has sufficient time to shut down properly. Always plan for
a sufficient headroom.
The outputs of the UPS are irrevocably switched off after the delay time has elapsed, even if the power
supply returns.
ð In this example, in the event of a power failure, the critical alarm is triggered after two minutes and
thereafter the Industrial PC is shutting down. As soon as the critical alarm is triggered, the set countdown
of 180 seconds is started. The shutdown of the Industrial PC must be successfully completed within this
time (180 seconds), since the outputs of the UPS are switched off directly after the 180 seconds have
elapsed.
CU8110-0060 Version: 1.0
Configuration
37