Intel SPSH4 - Server Platform - 0 MB RAM, Technical Product Specification

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Power supply Subsystem SPSH4 Server System External Product Specification
Revision 1.11 20
4.2 Airflow Requirements
Airflow enters the power supply at the DC connector face and is exhausted at the handle face.
Fan speed is controlled by the server system via the FANC signal to the power supply. The
power supply may override the FANC signal and operate the fan at HIGH speed if the
conditions of the power supply exceed those specified in Table 4. The minimum airflow required
by the power supply for high and low intake temperatures are shown in Table 4 also.
Table 4: Airflow Requirements
Item Description Minimum CFM
High Ambient Temperature Airflow through power supply;
max load, T
intake
=50
°
C, 5000 ft elevation
21
Low Ambient Temperature Airflow through power supply;
max load, T
intake
=35
°
C, 5000 ft elevation
17
4.2.1 Over-Temperature Protection
The power supply is protected against over temperature conditions caused by loss of fan
cooling or excessive ambient temperature. In the event of an OTP condition, the power supply is
shutdown. When the power supply temperature returns to within specified limits, the power
supply will automatically restore power.
The power supply sends an alert to the system of the OTP condition via the power supply FAIL
signal and the amber FAIL LED at the rear of the failed power supply is illuminated. When
temperatures read by the over temperature sensors in power supply return to within the normal
operating range, DC power is automatically restored. The power supply has built in hysteresis
circuits to prevent the power supply from oscillating on and off due to over temperature recovery
conditions.
4.2.2 Connectors and Pinouts
4.2.2.1 AC Inlet
The power supply AC inlet is an IEC320 C-14 receptacle. The AC power pins and wiring prior to
the protective fuse(s) have a peak current rating higher than the peak inrush current or
maximum fault current drawn by the power subsystem. The safety ground pin of the power
supply is the first pin to connect and the last to disconnect when the AC cord is inserted or
removed from the power subsystem housing.
4.2.2.2 DC Output Connector
The blind-mate DC output connector is the interface to the server system for output voltages,
control signals, and alarm signals. Connector pin descriptions and assignments are listed in
Table 5 and Table 6. Pin A6 is shortened to disabling power supply just prior to disconnecting
the DC output connector during a hot swap operation. The connector is keyed to the power
supply by the positioning of the guide/keying pins on either side of the connector. The keying
location for the connector is A1.