Dell IP4700 Service Guide - Page 34

SPS (Standby Power Supply), The Standby, Power Supply SPS

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The IP4700 1 SPS (Standby Power Supply) The IP4700 uses write caching and requires an SPS to prevent data loss during a power failure. Two 800-watt SPS units (see Figure 1-12) fit beneath the IP4700 and maintain power until write cache data can be safely stored to the disk. For detailed information about installing an SPS and cabling it to the IP4700, refer to Chapter 4, The Standby Power Supply (SPS). AC power connector Power switch SP interface connector SPS fault LED (amber) Replace battery LED (amber) Figure 1-12 Rear View of a Single SPS On-line LED (green) On battery LED (amber) EMC1466 1-16 IP4700 Installation and Service Guide

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1
1-16
IP4700 Installation and Service Guide
The IP4700
SPS (Standby Power Supply)
The IP4700 uses write caching and requires an SPS to prevent data
loss during a power failure. Two 800-watt SPS units (see Figure 1-12)
fit beneath the IP4700 and maintain power until write cache data can
be safely stored to the disk. For detailed information about installing
an SPS and cabling it to the IP4700, refer to Chapter 4,
The Standby
Power Supply (SPS)
.
Figure 1-12
Rear View of a Single SPS
EMC1466
AC
power
connector
Power
switch
SPS
fault
LED
(amber)
Replace
battery
LED
(amber)
On
battery
LED
(amber)
On-line
LED
(green)
SP
interface
connector