faq01936- ... want to backup operation with batteries if the AC power input is interrupted. → S8TS Series or S8T-DCBU-01 You want the use the output voltage detection alarm function. → S82K-[][][][][]T, S...
https://www.ia.omron.com/support/faq/answer/22/faq01936/
faq01962- ...tary power interruptions? Answer S8TS Block-type Switch Mode Power Supply (24-VDC output) and S8T-DCBU-01 DC Backup Block for S8TS can be combined with the specified battery to prevent the ...
https://www.ia.omron.com/support/faq/answer/22/faq01962/