PWRS-0026 User Manual
Page 12 of 19
V. Logic Board
LOGIC board is responsible for :
1) PCI interface with the HOST, achieved by using a smart PCI to
LOCAL bridge
2) UPS control – including charger circuitry, power failure detection
and handshake with NT via serial bus or CPCI bus for power shut
down sequence.
3) Routing power signals from the BACKUP board to PS during power
failure.
The power failure detection circuit is responsible for identifying a power
failure and switching the Backup. During a short power loss, the logic
(with selectable FAIL_TIME), may rely on internal capacitance to ensure
continuous operation rather than aborting to a shutdown mode.
