Part Number: 122007-00 Rev 05
1
Alpine DC Power Supply Installation
Notes
Overview
These installation notes describe the Alpine
™
DC power supplies, list the steps required to
prepare the power supplies and the cabling, and list the steps required to remove and replace a
power supply.
The Alpine chassis accommodates two power supplies. There are two types of power supplies
available: AC and DC. Both installed power supplies must be of the same type. This document
describes DC power supply installation.
Caution: Service to Alpine power supplies should be performed by trained service
personnel only. Before installing or removing any components of the system, or before
carrying out any maintenance procedures, read the safety information provided in
Appendix A of the Extreme Networks Consolidated Hardware Guide.
DC power supplies operate with DC input ranging from -40 to -70 V. These power supplies are
fully fault tolerant and load-sharing, so that if one power supply fails, the other power supply
will provide sufficient power to operate a fully loaded chassis. They are also hot-swappable, so
you can add a second power supply without powering off the chassis.
Caution: The Alpine chassis must be grounded. Use the ground lug on the Alpine DC
power supplies. Additionally, you can use the grounding studs on the rear panel of the
chassis.
The front of the power supply provides status LEDs, described in Table 1.
Each power supply has four outputs that connect to the chassis. These four outputs provide
power for the entire chassis.
Table 1:
Alpine
DC Power Supply LEDs
LED
Color
Indicates
DC OK
Green
Normal
Off
Unplugged or fault
Service
Amber
Fault
Off
Normal
