IBM DS3500 User Manual

off or malfunctions, the other power supply maintains electrical power to the
storage subsystem or storage enclosure. To preserve the optimal airflow, do not
remove a failed power supply from the chassis until you are ready to replace it
with a new power supply.
Figure 9 shows the ac power supply components.
DC power supply and fan units
The DS3524 storage subsystem (model C4T) and EXP3524 storage enclosure (model
E4T) each have two removable dc power supplies. Each dc power supply has two
fans.
The four fans pull air through the drives from front to back across the drives. The
fans provide redundant cooling, which means that if one fan fails, the remaining
fans continue to provide sufficient cooling to operate the storage subsystem or
storage enclosure. If one power supply is turned off or malfunctions, the other
power supply maintains electrical power to the storage subsystem or storage
enclosure. To preserve the optimal airflow, do not remove a failed power supply
from the chassis until you are ready to replace it with a new power supply.
Figure 10 shows the dc power supply components.
Figure 11 and Table 3 on page 15 below show the location and describe the
function of the dc power supply connector pins.
Power
switch
Power
connector
Power
switch
Power
connector
Figure 9. AC power supply components
Power
switch
Power
connector
Power
switch
Power
connector
Figure 10. DC power supply components
Figure 11. DC power supply connector - pin positions
14 IBM System Storage DS3500 and EXP3500 Storage Subsystem: Installation, User's, and Maintenance Guide

IBM DS3500 Specifications

General

Brand	IBM
Model	DS3500
Category	Storage
Language	English