Intel NetStructure ZT 5085, Руководство пользователя

Страница: 56 / 106

56
Technical Product Specification
Cooling Subsystem
5.1.1 Blowers
Each fan tray contains three blowers, one provided by Delta and two blowers provided by Comair,
for a total of nine blowers in an ZT 5085 system. Each blower has a two-phase, four-pole motor.
Table 10 lists blower specifications.
5.1.2 Control Board
The fan tray includes a control board for fan tray management. The control board provides the
following features:
•
Power sequencing
/
inrush limiting
•
Over-current protection
•
Backfeed protection
•
Health LED control
•
FRU information
•
Temperature monitoring
•
Voltage monitoring
On insertion or initial power up, the fan control board stages power to the blowers. The first blower
is enabled immediately. The second blower is enabled about 300ms after the first, and the third
blower is enabled about 300ms after the second. Each blower is independently protected using a
self-resetting PTC.
The control board also includes logic to set the LED to the “unhealthy” state if any of the blowers
drop below approximately 1000 RPM, or if onboard voltage is invalid. The chassis management
module can also force the LED to the “unhealthy” state.
Table 10. Delta* Blower Motor Specifications
Parameter Description
Rated Voltage 12 VDC
Operation Voltage 7.0 – 13.8 VDC
Input Current 1.15 (max. 1.73) A
Input Power 13.8 (max. 20.6) W
Max Speed 3100 rpm
Max. Air Flow
(at Zero Static Pressure) 1.12 (min. 1.00) m
3
/min.
39.55 (Min. 31.5) CFM
Max. Air Pressure
(at Zero Air Flow) 33.0 (min. 25.0) mmH
2
O
1.299 (min. 0.984) inchH
2
O
Acoustical Noise (Avg.) 56.5 (max. 59.0) dB-A
Life Expectancy 70,000 hours continuous operation at 40°C with 15-65% RH