Spectra T950 - Page 80

Chapter 2 — Architecture Overview High-Availability Configurations
November 2016 User Guide—Spectra T950 Library
80
Thelibrarymainframerequiresone24VDCpowersupplytoprovide
powerforthelibraryrobotics,motors,fans,andinteriorLEDlightbars.An
additional24VDCsupplycanbeinstalledtoprovide redundancy.
Themainframeandeachdriveframehavebothaprimaryanda
secondaryACpowerinput.WhenusingaredundantACpower
configuration,eachinputforaframeisconnectedtoaseparatebranch
circuit,whichallowsforfailoverintheeventofapowerfailureinoneof
thecircuits.ThetwoACinputsforeachframemustbeinphase,andthe
voltagesmustbethesamewithinafewvolts.Iftheserequirementsarenot
satisfied,theremaybeproblemsswitchingbetweenthetwoACpower
sources.SeeInputPowerRequirementsonpage537formoreinformation.
Caution
The main and drive expansion frames are designed to be used on single phase
power only. If the power sources for the dual AC inputs for a frame are not on the
same phase, damage to the library could result.