Chapter 1: Components
4U56 Drive System
QX and QXS Setup Guide
28
56 Drive Expansion chassis: Rear Panel Components
Figure 35 below and table display and identify important components that comprise the rear panel layout of
a 56-Drive Expansion chassis.
Figure 35:
56 Drive Expansion Chassis: Rear Panel Layout
LINK
LINK
SERVICE
IN
OUT
LINK
LINK
SERVICE
IN
OUT
3
4
5
5
3
4
1
2
1.
Expansion I/O Module A
2.
Expansion I/O Module B
3.
AC Power Supply Switch
4.
Power Supply Module
5.
Fan Module
An expansion chassis accommodates the following:
l
Two expansion I/O modules of the same type within the Expansion I/O Module slots (see callouts 1 and
2 above)
l
Two power supplies (CRU) of the same type either both AC or both DC— within the two power supply
slots (see two instances of callout 4)
l
Separate power supply switches (see two instances of callout 3)
l
Two fan control modules (see two instances of callout 5)
Caution:
An expansion I/O module must be installed in each Expansion I/O Module slot to ensure
sufficient airflow through the chassis during operation.
