Dc Power Connector; Cisco Rps Connector; Console Port - Cisco Catalyst 3750 Hardware Installation Manual

Rear Panel Description

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."
You must connect the Catalyst 3750G-12S-SD switch only to a DC-input power source that has an input
Caution
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 675 (model PWR675-AC-RPS-N1=) supports the Catalyst 3750 family of switches,
except the Catalyst 3750G-12S-SD switch.
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.
Attach only the Cisco RPS (model PWR675-AC-RPS-N1) to the RPS receptacle. Statement 100C
Warning
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.

Console Port

You can connect the switch to a PC by means of the console port and the supplied RJ-45-to-DB-9 female
cable. If you want to connect the switch console port to a terminal, you need to provide an
RJ-45-to-DB-25 female DTE adapter. You can order a kit (part number ACS-DSBUASYN=) containing
that adapter from Cisco. For console port and adapter pinout information, see the
Specifications" section on page
On the Catalyst 3750G-24WS-S25 and the 3750G-24WS-S50 switches, there are two console ports; the
Note
switch console port and the controller console port. The controller console port can be used to directly
configure the controller if you lose connectivity between the switch and the controller.
Catalyst 3750 Switch Hardware Installation Guide
1-26
B-1.
Chapter 1 Product Overview
Appendix C, "Connecting to
"Connector and Cable
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