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OCPRF100 MP Server System Technical Product Specification
Revision 1.0
67
5.7 Fan Speed Control
The fan circuitry implements variable speed fan control and fan failure detection.
5.8 Environmental Requirements
5.8.1 Physical Environment
The power supply is located inside an Intel
®
system assembly. A system may contain two or
three power supplies.
5.8.2 Thermal Protection
The power supply incorporates thermal protection that causes a shutdown if air flow through the
power supply is insufficient. Thermal protection activates a shutdown if the temperature of any
power supply component is more than 85% (°C) of rated temperature. This shutdown takes place
prior to over-temperature induced damage to the power supply.
5.9 Regulatory Agency Requirements
The power supply must have UL recognition, CSA certification to level 3, Bauart and any NOR-
DIC CENELEC certified (such as SEMKO, NEMKO or SETI) markings demonstrating compli-
ance. The power supply must also meet FCC Class B, VDE 0871 Level B, and CISPR Class B
requirements.
Table 5-15: Power Supply LEDs and Output Signal State Logic
Power Supply LEDs Power Supply Output Signal States Input to
PS
Conditions
PWR
(green)
PRFL
(yellow)
FAIL
(yellow)
P_Good
H = pwr
good
Pred. Failure
H = pred.
failure
PS Failure
H = PS OK
PS On
H = PS
enable
No AC Power OFF OFF OFF L L L L
AC In/Standby On Blinking OFF OFF L L H L
DC Outputs OK ON OFF OFF H L H H
Power Supply
Failure
OFF OFF ON L L L H
Current Limit ON OFF Blinking/
No Latch
LL H H
Predictive Failure ON Blinking/
Latched
OFF H H H H