Ups Considerations - NEC M310 Configuration Manual

5. Functions <UPS Considerations>

UPS Considerations

1. Select a UPS to meet both the apparent power (VA) and the active power (W) requirements of the
storage disk array unit. Refer to the UPS manual for more details.
2. Storage units have redundant power supplies, there are two AC inputs in each unit. Both power
supplies are in use during normal operation. In the event of one power supply should fail, due to a
tripped breaker off or UPS failure, the remaining power supply is capable of providing power. Make
sure that the selected UPS is capable of providing sufficient and reliable power for all devices.
n Example: Improper configuration for active power
Disk Array Controller
(NL-SAS)
Disk Enclosure
(NL-SAS)
M310 (3.5") Disk Array Controller
power consumption (NL-SAS)
Disk Enclosure power consumption
(NL-SAS)
UPS1 load power
UPS2 load power
3. When using a standby type UPS (requires a sensitivity mode setting) specific configuration
elements must be addressed. In order to ensure reliable power in the event of an outage, set the
sensitivity mode transfer time from the commercial power source to the battery power to 20ms or
less.
PS1
PS1
Rating:
UPS1
750VA / 480W
Rating:
750VA / 480W
PS1
252.5VA/250W
150VA/147.5W
402.5VA/397.5W
-
NEC Confidential
PS0
PS0
UPS normal load
PS0
252.5VA/250W
150VA/147.5W
-
402.5VA/397.5W
UPS2
UPS2 failure
505VA/500W
300VA/295W
805VA/795W
The active power
exceeds the UPS rating
level.
(Fail)
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