Dc Power Supply In Ex4300 Switches - Juniper EX4300 Series Hardware Manual

Table 46: AC Power Supply LEDs in EX4300 Switches
LED
NOTE: If the IN OK LED and the OUT OK LED are not lit green, either the AC power cord is not
installed properly or the power input voltage is not within normal operating range.
If the IN OK LED is lit green and the OUT OK LED is unlit or lit red, the AC power supply is
installed properly, but the power supply has an internal failure.

DC Power Supply in EX4300 Switches

IN THIS SECTION
Characteristics of a DC Power Supply | 113
DC Power Supply Airflow | 115
N+0 Redundancy Configuration of DC Power Supplies | 115
N+N Redundancy Configuration of DC Power Supplies | 117
The DC power supply in EX4300 switches is a hot-insertable and hot-removable field-replaceable unit
(FRU): You can install it without powering off the switch or disrupting the switching function.
NOTE: EX4300-24T, EX4300-24P, EX4300-32F, EX4300-48T, EX4300-48T-AFI, EX4300-48P,
EX4300-48MP, and EX4300-48MP-S models do not support DC power. EX4300-24T-S,
(Continued)
Color Description
Green The power supply is delivering power and is
functioning correctly.
Red The power supply has failed and must be
replaced.
112