Cisco Systems WSC3750X24TS Internal Power Supply Connector, DC Power Connector, Cisco RPS, 1-26

Chapter 1 Product Overview

Rear Panel Description

Internal Power Supply Connector

The internal power supply is an autoranging unit that supports input voltages between 100 and 240 VAC. Use the supplied AC power cord to connect the AC power connector to an AC power outlet.

DC Power Connector

The Catalyst 3750G-12S-SD has an internal DC-power converter. It has dual feeds (A and B) that are diode-OR-ed into a single power block. For installation instructions, see Appendix C, “Connecting to DC Power.”

Caution You must connect the Catalyst 3750G-12S-SD switch only to a DC-input power source that has an input supply voltage from –36 to –72 VDC. If the supply voltage is not in this range, the switch might not operate properly or might be damaged.

Cisco RPS Connector

The Cisco RPS 2300 (model PWR-RPS2300) and the Cisco RPS 675 (model PWR675-AC-RPS-N1=) support the Catalyst 3750 family of switches, except the Catalyst 3750G-12S-SD switch.

Warning Attach only the following Cisco RPS model to the RPS receptacle:

PWR-RPS2300, PWR675-AC-RPS-N1=. Statement 370

Cisco RPS 2300

The Cisco RPS 2300 has two output levels: –52 V and 12 V with a total maximum output power of 2300 W.

The Cisco RPS 2300 is a redundant power system that provides seamless failover for up to six network devices for internal power supply failures. It automatically senses if an internal power supply of a connected device fails and immediately supplies power to the failed device. For more information on the Cisco RPS 2300, see the Cisco RPS 2300 Redundant Power System Hardware Installation Guide.

Cisco RPS 675

The Cisco RPS 675 has two output levels: –48 V and 12 V with a total maximum output power of 675 W. Use the supplied RPS connector cable to connect the RPS to the switch.

The RPS is a redundant power system that can support six external network devices and provides 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. For more information on the Cisco RPS 675, see the Cisco RPS 675 Redundant Power System Hardware Installation Guide.

Catalyst 3750 Switch Hardware Installation Guide

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