SRPL8 Server System Product Guide 19
Hot-Swap Power Supplies
The chassis can be configured with two or three 750-watt power supplies in a 2 + 1 redundancy
configuration. If you have three supplies installed, you can hot-swap a failed supply without
affecting system functionality. If you have two supplies installed, they must occupy the left and
center bays (as you face the back of the server—see Figure 3 on page 17). Each supply is designed
to minimize EMI and RFI. This system is designed to operate at 100/200 VAC only.
The DC output voltages of each power supply are:
• +3.3 V at 36.0 A max
• +5 V at 36.0 A max (total combined output of +3.3 V and +5.5 V not to exceed 195 W)
• +12 V at 36.0 A with 42.0 A <10ms peak
• +24 V at 100 mA
• -12 V at 1.0 A
• +5 V standby 1.0 A
Each supply docks to a 36-pin connector on the system midplane.
System Cooling
The server contains two independent cooling subsystems:
• The upper system, cooling the front panel, profusion carrier, and I/O carrier
(5 + 1 redundancy)
• The lower system, cooling the memory modules, peripheral bay, and power supplies
(2 + 1 redundancy)
Both subsystems offer redundant cooling capabilities. As shipped from the factory, the minimum
configuration includes six system fans in the upper subsystem and two power supplies (each has an
integrated fan). You can install one additional power supply.
✏NOTE
All chassis covers must be on the system for proper cooling.