An optional 48 Vdc UCN Battery Backup Module (model MU-PSRB04) with a disconnect connector that provides continuous power to HPM/APM equipment in the event of a primary power loss.

The 48 volt battery backup time duration for a redundant HPM cabinet containing redundant HPMMs and a total of 40 IOPs (40 nonredundant or 20 redundant pairs) is approximately 20 minutes for a fully charged battery.