Installation guide

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Catalyst 3550 Multilayer Switch Hardware Installation Guide

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Chapter 2 Product Overview

Rear-Panel Description

Figure 2-9 Switch Rear Panel

AC Power Connector

For AC-powered switches, the internal power supply is an autoranging unit that

supports input voltages between 100 and 240 VAC.

For the Catalyst 2440-24-DC power information, see Appendix C, “DC Power

Connections.”

Cisco RPS Connector

For protection against a power supply failure, you can connect a Cisco RPS to the

switch. The Cisco RPS can support six external network devices and provide

power to one failed device at a time. It automatically senses when the internal

power supply of a connected device fails and provides power to the failed device,

preventing loss of network traffic.

The Cisco RPS 300 has two output levels: –48 V and 12 V with a total maximum

output power of 300 W. The Cisco RPS 675 has two output levels: –48 V and

12 V with a total maximum output power of 675 W.

1 RPS connector 3 Console port

2 AC power connector 4 Fan exhaust

100-240V~

5-3A

50/60Hz

DC OUTPUT 1

CONSOLE

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