PFD with 28V A320

[simua320]

Hello
in asm manuel, is show pfd connect on the 115VAC ESS SHED (401XP bus) : just normal and respect fcom information but aslo with 28V on 401PP bus.

what the signification of this?

thank you

[airguy2012]

pls refer CMM of DU by searching by PN. In CMM you will see exactly inside with I/O and sources.
regards,

[simua320]

thks for your reply.

i haven't cmm but in amm it seem indicated 28V is supply (DC ESS BUS) when AC ESS BUS (115V) is lost.