SPSH4 Server SystemTechnical Product Specification
Revision 1.11
Intel reference number 10736
75
7. System
Boards
This chapter describes the design and features of the SPSH4 system boards.
7.1 Power Distribution Board
The SPSH4 server system power supplys plug into a power distribution board (PDB). The PDB
provides power connectivity and server management features to the server system. The PDB is
located in the base of the chassis. Right-angle connectors on the PDB allow the blind-mating of
up to three power supply connectors. Two pop rivets and four 6-32 screws are used to secure
this board to the chassis mounting bracket.
The following power supply functions are monitored and reported to the I
2
C bus by an ADM1026
IC on the PDB board:
•
Power supply fan failure monitoring
•
ACOK monitoring indicate when AC to each power supply is within regulation to insure
proper system turn on even during a brownout recovery situation
•
Power supply presence monitoring
•
Power supply predictive failure monitoring
•
Power supply failure monitoring
•
SCSI bay fan failure monitoring
•
Field Replaceable Unit (FRU) information access for the PDB
The ADM1026 has an I
2
C slave address of 0x5A/5Bh.
The PDB board has an ISPLSI2032 power PLD, which is used manage the power-on and
power-good functionality. Power supply predictive fail, fail, present, and ACOK are monitored by
the power PLD. Power supply fan speed is controlled via signal outputs from the power PLD,
the speed control is either at high speed or at normal speed depending upon the state of the
server system.
The PDB also determines the I
2
C slave addresses for the three power supply modules as
follows: PS1 = 0xA0/A1h, PS2 = 0xA2/A3h, PS3 = 0xA6/A7h.
Summary of Contents for SPSH4 - Server Platform - 0 MB RAM
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