Intel NetStructure ZT 5085, Руководство пользователя

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Technical Product Specification
Power Subsystem
4.4.1 Redundant Power Feeds and Power Supplies
The ZT 5085 DC receives input power from redundant power feeds. Each power domain also
receives input power from redundant power feeds. Each redundant power feed provides input
power to half the power supplies within the power domain. Power budgets should assume that only
half of the provided power supplies in each domain are operational when faults are present. For
example, a system with eight power supplies per power domain only has four operation supplies in
each power domain if a DC input feed has failed. Refer to
“DC Power Distribution Overview” on
page 47 for more information about the effects of faults on the power subsystem.
4.5 Power Supply Capacity and Multiple Voltages
Power budgeting needs to account for the power supply capabilities for each of the four voltage
levels (3.3 V, 5 V, +12 V, and -12 V). The power capacity is dependent on the specific model of
power supplies being used.
For a system using eight Intel
®
NetStructure™ ZT 6303 250 W Hot Swap AC Power Supplies or
eight Intel
®
NetStructure™ ZT 6313 250 W Hot Swap DC Power Supplies, the power supplies can
provide the following currents for each voltage level:
As new power supplies are introduced with higher power outputs, more redundant power and
current can be delivered to the chassis.
4.5.1 CMMs and Fan Trays
The CMMs and fan trays draw power from the power supplies. Under normal conditions, each
domain provides approximately 50 percent of the power for these shared components. Power
budgets for each domain should provide for at least 50 percent of the necessary CMM and fan tray
power. Due to tolerances of the ORing diodes and the voltage levels, it is likely that slightly more
than 50 percent of the power will be drawn from the domain with the higher voltage. If this causes
a slight over-current situation, that voltage will drop until the ORing diodes automatically balance
the load between the two domains.
Table 7. ZT 5085 Budget by Voltage using 250W Power Supplies
Voltage
Max
Current/Supply
Redundant Max Current/
Chassis
1
Max Current/Chassis
2
3.3 V
3
40 A/supply 160 A 320 A
5 V
3
40 A/supply 160 A 320 A
+12 V 5.5 A/supply 22 A 44 A
-12 V 1.5 A/supply 6 A 12 A
NOTES:
1. AC systems have a higher max redundant/chassis.
2. The Max Current/Domain or Chassis should only be used in a development environment, or an
environment that does not require power redundancy.
3. Current on the 3.3 V and 5 V combined current cannot exceed 40 A per power supply.