Power Connectors; Internal Power Supply Connector; Dc Power Connector; Cisco Rps Connector - Cisco 3750G-12S - Catalyst Switch - Stackable Hardware Installation Manual

Chapter 1 Product Overview
You can order these StackWise cables from your Cisco sales representative:
•
•
•

Power Connectors

The switch is powered through the internal power supply. Except on the Catalyst 3750G-12S-SD switch,
you can also connect the Cisco RPS 2300 or the Cisco RPS 675 to provide backup power should the
switch internal power supply fail.
The Catalyst 3750 switch and the redundant power systems should be connected to the same
Note
AC power source.

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
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 for the Catalyst 3750G-12S-SD switch.
Cisco RPS 2300
The Cisco RPS 2300 has two output levels: –52 V and 12 V with a 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.
OL-6336-10
CAB-STACK-50CM= (0.5-meter cable)
CAB-STACK-1M= (1-meter cable)
CAB-STACK-3M= (3-meter cable)
Appendix C, "Connecting to
Catalyst 3750 Switch Hardware Installation Guide
Rear Panel Description
1-25