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Chapter 1
Product Overview
Fan Modules
The switch has two internal hot-swappable 12-V fan modules, each with two fans. The air circulation
system consists of the fan modules and the power supply modules. The airflow patterns vary depending
on the power supply configuration.
Figure 1-9
air flow, and the red arrow shows warm air flow. When the fan modules are operating properly, a green
LED is on at the top left corner of the fan assembly (viewed from the rear). If the fan fails, the LED turns
to amber.
Figure 1-9
MO DE
1
2
For information about installing a fan module and the module specifications, see
Supply and Fan Module Installation,"
XPS Connector
Warning
Attach only the following Cisco external power system to the switch: XPS 2200. Statement 387
The Cisco XPS 2200 is a expandable power system that can support nine network switches and provides
power to one or two failed switches at a time. It senses when the power supply of a connected switch
fails and provides power to the failed switch.
Use the XPS 2200 only with approved Cisco XPS cables. You can order these XPS cables for connecting
your switch to the XPS 2200 from your Cisco sales representative:
•
•
The Cisco XPS 2200 has a nominal output level of –56 V. The total maximum output power depends on
the installed power supply modules.
The nine ports on the XPS 2200 provide the power and management signals to the Catalyst 3750-X and
3560-X switches. Other switch models do not support this management communication. The XPS 2200
communicates with each switch through the 12-pin cable. All connected switches can simultaneously
communicate with the XPS 2200. You can configure these XPS 2200 features through the switch
software:
•
•
•
OL-19593-03
shows the airflow patterns for the 12-, 24-, and 48-port switches. The blue arrow shows cool
24- and 48-Port Switch Airflow Patterns
CON SOL
E
SYS T
XPS
EN
STA T
S-PW R
SPE ED
MAS T
DUP LX
STA CK
PoE
3
4
5
6
7
8
9
10
11 12
1
2
3
4
5
6
7
8
9
10
11 12
1
2
3
4
CAB-XPS-58CM (0.58-meter cable)
CAB-XPS-150CM (1.5-meter cable)
Enable XPS active or standby mode for each connected switch
Configure switch priority for XPS support
List the connected switches and power supply module sizes
C3 KX -N
M- 10 G
5
6
7
8
9
10
11 12
1
2
3
4
5
6
7
8
9
10
Ca tal ys
t 37 50 -X
11 12
Po E+ 48
G1
G2 /TE 1
G3
and
Appendix A, "Technical Specifications."
Catalyst 3750-X and 3560-X Switch Hardware Installation Guide
Rear Panel Description
NE TW OR
K
MO DU LE
G4 /TE 2
Chapter 3, "Power
1-23
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