Cabletron Systems 9C214-2, Руководство по установке

Страница: 25 / 30

3-5
9C214-2 Power Supply Operation
The Power Supply Level Indicator LED indicates, by segment number, the
percentage of the power supply’s capacity being used. The possible states and
descriptions of the Power Supply Level Indicator LED are listed in Table 3-3.
Load Sharing
Each 9C214-2 Power Supply uses a current sharing design. This design allows
multiple power supplies to equally (within ± 5%) share the output load. For
example, if two power supplies are used, each power supply provides 50% ± 5%
of the output load. This feature increases the life of each power supply.
Table 3-3. Power Supply Level Indicator LED
Segment
Number(s)
LED
Color
State Description
1 - 5 Green 0–49% of power load being
used. No action necessary.
6 - 9 Green 50-89% of power load being
used. No parallel power supply
operational. No action necessary.
6 - 9 Green/
Yellow 50-89% of power load being
used. Parallel supply(ies)
installed; however, yellow
indicates loss of redundancy. Add an additional
power supply if
redundancy is
desired.
10 Yellow Greater than 90% of power
supply being used. Add an additional
power supply for
redundancy.
11 Red Overload condition exists. Add an additional
power supply or
reduce number of
modules in the
chassis.