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Using redundant power can minimize the power disruption during a power supply
failure and extend the expected lifetime of each power supply by operating normally
in a conservative power mode.
For proper airflow when operating the switch with only one power supply module,
the empty power supply bay must be protected by a blank cover module.
There is no power switch on the G8052 power modules; the switch powers up when
power is supplied through the power cord to one or both power supplies.
Power LEDs
On the front of the switch, the Power LED on the management panel indicates the
general status of the power supplies. The LED flashes when only one power cord is
connected, and is steady when both power cords are connected (see
Status LEDs" on page
22).
Additional LED indicators are located on the rear panel of the switch, on the
individual power supply modules. The following table describes the power supply
module LED behavior.
Table 8. Power supply module status LED behavior
LED
State
Service ( ! )
Amber
Off
OK
Green
Off
AC
Green
Off
Functional Meaning
Power supply failure.
Power supply is operational.
DC output power is present.
DC output power is OK.
AC power is OK.
No power. Output is disabled, or input
power is outside operating range.
"System
Chapter 2: Switch Components
27
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