Rear Panel; Fans; Power Supply - Lenovo G7028 Installation Manual

Rear Panel

Fans

Power Supply

© Copyright Lenovo 2015
Three internal fans cool the switch unit. If an individual fan fails, the other fans
continue to run, and the switch unit continues to operate normally.
Note: Fans are not customer replaceable.
Fan operation and internal temperatures are monitored. If the air temperature
exceeds a desired threshold, the environmental monitor displays warnings.
Note: If a fan fails, the maximum operating temperature drops from +40°C (104°F)
to +35°C (95°F).
If there is a failure of one or more fans, the front panel Fan LED flashes.
The rear panel of the G7028 has two power connectors. The IEC 320 power
connector is for primary AC power when attached to a universal grounded AC power
source. The DC power connector supports an external DC redundant power supply
that can be purchased separately.
Compatible power options are listed in the
Statement 5
CAUTION:
The power control button on the device and the power switch on the power
supply do not turn off the electrical current supplied to the device. The device
also might have more than one power cord. To remove all electrical current
from the device, ensure that all power cords are disconnected from the power
source.
Lenovo Networking Catalog.
Chapter 2: Switch Components
25