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Removing and Installing Power Supplies
Catalyst 8540 Chassis Installation Guide
4-2
Removing and Installing Power Supplies
As your communication requirements change, you might want to upgrade your system and
add or replace a power supply. This section contains the following power supply
information:
• Power Supply LEDs
• Overvoltage and Overtemperature Protection
• Removing and Installing AC-Input Power Supplies
• Removing and Installing DC-Input Power Supplies
Power Supply LEDs
The three LEDs (see Figure 4-1) on the power supply indicate the status of the power
supply. The Input OK LED indicates that the power supply is on and receiving source
power. The Fan OK signal indicates that the fan assembly is operating properly. The Output
Fail LED is lit only when output voltage is outside of proper range,+3.3, +5, +12, and
+42 VDC.
Figure 4-1 Power Supply
Power
switch
Cable
retention
clip
Metal prongs
Power
connection
INPUT
O
K
FAN
OK
OUTPUT
FAIL
Captive screw
16787