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Cisco CGS 2520 Hardware Installation Guide
OL-31444-01
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Power Supply Installation
This chapter describes how to remove and install a new or replacement power supply. Your switch ships
with at least one installed power supply module (AC or DC, depending on your order). The power supply
modules are field-replaceable units (FRUs) and are hot-swappable.
For translations of the safety warnings in this chapter, see the Regulatory Compliance and Safety
Information for the Cisco CGS 2520 on the documentation CD and also on Cisco.com.
• Power Supply Modules, page 3-1
• Installation Guidelines, page 3-3
• Grounding the Switch, page 3-4
• Installing the Power Supply Module in the Switch, page 3-6
• Wiring the Power Source, page 3-7
• Removing the Power Supply Module, page 3-11

Power Supply Modules

For information on the power supply modules, see the “Power Supply Features” section on page 1-14.
Note Each power supply module can support an equivalent PoE load of two PoE+ ports or four PoE ports.
When both power supply modules are installed, the system has enough power to support four PoE+ ports,
or eight PoE ports. If ports are designated as high priority and low priority PoE or PoE+ ports at the
command line interface (CLI), and one power supply module fails or is removed, power to the high
priority ports is maintained, and power to the low priority ports is dropped. When assigning priority to
PoE or PoE+ ports, it is important to assign priorities on the basis of power supply capacity.
Table 3-1 Power Supply Modules
Model Description
PWR-RGD-LOW-DC Low-voltage DC. For voltage information, see Table A-8 on page A-4
PWR-RGD-AC-DC High-voltage AC or DC. For voltage information, see Table A-7 on page A-4
PWR-RGD-AC-DC-C (For China) High-voltage AC or DC. For voltage information, see Table A-7
on page A-4