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Catalyst 3750-E and Catalyst 3560-E Switch Hardware Installation Guide
OL-9774-03
Chapter 1 Product Overview
Rear Panel Description
The power-supply modules have two status LEDs. Table 1-12 lists the LED colors and their meanings.
Ta b l e 1-12 24- and 48-Port Switch Power-Supply Module LEDs
AC-Power-Supply Module LEDs
AC OK Description PS OK Description
Off No AC input power. Off Power supply failure.
Green AC input power present. Green Power output to switch active.
Red No output power to switch.
DC-Power-Supply Module LEDs
DC IN Description PS OK Description
Off No DC input power. Off Power supply failure.
Green DC input power present. Green Power output to switch active.
For more information about replacing a power-supply module, wiring a DC-power-supply module, and
for module specifications, see
Chapter 3, “Power Supply and Fan Module Installation,” and Appendix A,
“Technical Specifications.”
Catalyst 3560E-12D and 3560E-12SD Switch Power-Supply Modules
The Catalyst 3560E-12D and 3560E-12SD switches have two internal 300-W power-supply modules
(
Table 1-13). The AC-power-supply modules are autoranging units that support input voltages between
85 and 265 VAC. The DC-power-supply modules have a single input feed and support input voltages
between –40.5 and
–72 VDC. You can use two AC modules, two DC modules, or a mixed configuration
of one AC and one DC power-supply module.
The Catalyst 3560E-12D and 3560E-12SD switches can operate with only one active power-supply
module. However, two power supply modules must always be physically installed in the switch rear
panel when the switch is operating, even if one module is defective. This is required to maintain adequate
airflow in the chassis and prevent overheating.
Caution Do not operate a Catalyst 3560E-12D or 3560E-12SD switch with one power-supply module removed
from the rear panel. For proper chassis cooling, two power-supply modules must be installed in the
switch rear panel.
The AC power-supply modules have a power cord for connection to an AC-power outlet. The DC
power-supply modules require wiring to a DC-power source. The AC-power supplies have an on/off
power switch. DC-power supplies do not have an on/off switch.
Ta b l e 1-13 Catalyst 3560E-12D and 3560E-12SD Switch Power-Supply Modules
Switch AC-Power-Supply Module DC-Power-Supply Module
Catalyst 3560E-12D C3K-PWR-300WAC= C3K-PWR-300WDC=
Catalyst 3560E-12SD C3K-PWR-300WAC= C3K-PWR-300WDC=
