Cisco Catalyst Express 520 Manuale utente

A-1

User Guide for the Catalyst Express 520 Switches

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APPENDIX

Reference

Chapter Topics

•Technical Specifications, page A-2

•Location of the Switch Serial Number, page A-4

•Connector Specifications, page A-5

•Cabling Guidelines, page A-10

•Cable and Adapter Specifications, page A-13

Appendix A Reference

Technical Specifications

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Technical Specifications

This section lists the switch technical specifications in Table A-1.

Table A-1 Specifications for the Catalyst Express Switches

Environmental Ranges

Operating temperature 32 to 113°F (0 to 45°C)

Storage temperature –13 to 158°F (–25 to 70°C)

Relative humidity 10 to 85% (noncondensing)

Operating altitude Up to 10,000 ft (3049 m)

Storage altitude Up to 15,000 ft (4573 m)

Power Requirements

AC input voltage Catalyst Express 520-8PC-K9:

100 to 240 VAC, 2.5 to 1.3 A (autoranging), 50 to 60 Hz

Catalyst Express 520-24TT-K9:

100 to 240 VAC, 1.3 to 0.8 A (autoranging), 50 to 60 Hz

Catalyst Express 520-24LC-K9:

100 to 240 VAC, 2 to 1 A (autoranging), 50 to 60 Hz

Catalyst Express 520-24PC-K9:

100 to 240 VAC, 8 to 4 A (autoranging), 50 to 60 Hz

Catalyst Express 520G-24TC-K9:

100 to 240 VAC, 1.3 to 0.8 A (autoranging), 50 to 60 Hz

DC input voltages for RPS 6751+12 V @14 A, –48 V @7.8 A

Power consumption Catalyst Express 520-8PC-K9: 204 W or 696 BTUs per hour

Catalyst Express 520-24TT-K9: 30 W or 102 BTUs per hour

Catalyst Express 520-24LC-K9: 110 W or 375 BTUs per hour

Catalyst Express 520-24PC-K9: 460 W or 1570 BTUs per hour

Catalyst Express 520G-24TC-K9: 45 W or 154 BTUs per hour

Power dissipation Catalyst Express 520-8PC-K9: 80 W or 272 BTUs per hour

Catalyst Express 520-24TT-K9: 30 W or 102 BTUs per hour

Catalyst Express 520-24LC-K9: 45 W or 153 BTUs per hour

Catalyst Express 520-24PC-K9: 90 W or 307 BTUs per hour

Catalyst Express 520G-24TC-K9: 45 W or 153 BTUs per hour

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Appendix A Reference

Technical Specifications

Power rating Catalyst Express 520-8PC-K9: 0.2 KVA

Catalyst Express 520-24TT-K9: 0.050 KVA

Catalyst Express 520-24LC-K9: 0.120 KVA

Catalyst Express 520-24PC-K9: 0.460 KVA

Catalyst Express 520G-24TC-K9: 0.075 KVA

Power over Ethernet 15.4 W per port maximum

Catalyst Express 520-8PC-K9: Up to 124-W switch maximum

Catalyst Express 520-24LC-K9: Up to 62-W switch maximum

Catalyst Express 520-24PC-K9: Up to 370-W switch maximum

Physical Dimensions

Weight Catalyst Express 520-8PC-K9: 5 lb (2.3 kg)

Catalyst Express 520-24TT-K9, Catalyst Express 520-24LC-K9,

and Catalyst Express 520G-24TC-K9: 8 lb (3.7 kg)

Catalyst Express 520-24PC-K9: 12 lb (5.5 kg)

Dimensions (H x D x W) Catalyst Express 520-8PC-K9:

1.73 x 9.1 x 10.6 in. (4.4 x 23 x 26.9 cm)

Catalyst Express 520-24TT-K9, Catalyst Express 520-24LC-K9,

and Catalyst Express 520G-24TC-K9:

1.73 x 17.5 x 9.9 in. (4.39 x 44.45 x 25.15 cm)

Catalyst Express 520-24PC-K9:

1.73 x 17.5 x 14.4 in. (4.39 x 44.45 x 36.58 cm)

Acoustic Dimensions2

ISO 7770, bystander position: Operating to an ambient temperature of 86ºF (30ºC)

Catalyst Express 520-24TT-K9, Catalyst Express 520-24LC-K9, and

Catalyst Express 520G-24TC-K9: 40 dBa

Catalyst Express 520-24PC-K9: 48 dBa

1. Not all Catalyst Express 520 models have an RPS connector.

2. Not applicable to the Catalyst Express 520-8PC-K9 switch.

Table A-1 Specifications for the Catalyst Express Switches (continued)

Appendix A Reference

Location of the Switch Serial Number

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User Guide for the Catalyst Express 520 Switches

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Location of the Switch Serial Number

If you contact Cisco Technical Assistance, you need to know the serial number of

your switch. See Figure A-1 to locate the serial number on your switch. You can

also find the switch serial number from the device manager Dashboard

(Figure A-2).

Figure A-1 Serial Number Location on the Catalyst Express 520-8PC-K9

Switch

Figure A-2 Serial Number Location on the Catalyst Express 520 Switches

Except the Catalyst Express 520-8PC-K9 Switch

SN: XXXNNNNXXXX

201710

SYST

ALR

PoE

ADMIN

Catalyst Express 520

Series

POWER

OVER

ETHERNET

12345678

202294

SN: XXXNNNNXXXX

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User Guide for the Catalyst Express 520 Switches

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Appendix A Reference

Connector Specifications

This section describes the connectors on the switch.

•10/100 and 10/100/1000 Ports, page A-5

•SFP Module Ports, page A-8

•Dual-Purpose Ports, page A-9

10/100 and 10/100/1000 Ports

The 10/100 and 10/100/1000 Ethernet ports use standard RJ-45 connectors and

Ethernet pinouts with internal crossovers. These ports have the send (TD) and

receive (RD) signals internally crossed so that a twisted-pair straight-through

cable and adapter can be attached to the port. Figure A-3 shows the pinout for a

10/100 port.

Figure A-3 10/100 Port Pinouts

H5318

231 45678Pin Label

RD+

RD-

TD+

TD-

Appendix A Reference

Connector Specifications

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User Guide for the Catalyst Express 520 Switches

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Figure A-4 shows the pinout for a 10/100/1000 port.

Figure A-4 10/100/1000 Port Pinouts

Caution PoE faults are caused when noncompliant cabling or powered devices are

connected to a PoE port. Only standard-compliant cabling can be used to connect

Cisco pre-standard IP Phones or wireless access points or

IEEE 802.3af-compliant devices to PoE ports. A cable or device that causes a PoE

fault must be removed from the network.

When connecting 10/100 and 10/100/1000 ports to compatible devices such as

servers, workstations, and routers, you can use a two or four twisted-pair

straight-through cable wired for 10BASE-T and 100BASE-TX. Figure A-8 shows

the two twisted-pair straight-through cable schematics. Figure A-10 shows the

four twisted-pair straight-through cable schematics.

When connecting the ports to other devices, such as switches or repeaters, you can

use a two or four twisted-pair crossover cable. Figure A-9 shows the two

twisted-pair crossover cable schematics. Figure A-11 shows the four twisted-pair

crossover cable schematics.

60915

231 45678Pin Label

TP0+

TP0-

TP1+

TP2+

TP2-

TP1-

TP3+

TP3-

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User Guide for the Catalyst Express 520 Switches

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Appendix A Reference

Connector Specifications

You can the Cisco Configuration Assistant to enable the automatic

medium-dependent interface crossover (auto-MDIX) feature. When the

auto-MDIX feature is enabled, the switch detects the required cable type for

copper Ethernet connections and configures the interfaces accordingly. Therefore,

you can use either a crossover or a straight-through cable for connections to a

copper 10/100, 10/100/1000, or 1000BASE-T SFP module port on the switch,

regardless of the type of device on the other end of the connection.

The auto-MDIX feature is enabled by default.

You can use Category 3, 4, or 5 cabling when connecting to

10BASE-T-compatible devices. You must use Category 5 cabling when

connecting to 100BASE-TX-compatible devices.

Note Use a straight-through cable to connect two ports only when one port is

designated with an X. Use a crossover cable to connect two ports when both ports

are designated with an X or when both ports do not have an X.

This applies only to switches on which auto-MDIX is disabled.

Appendix A Reference

Connector Specifications

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User Guide for the Catalyst Express 520 Switches

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SFP Module Ports

The SFP module ports on the switch use fiber-optic SFP modules with LC

connectors (Figure A-5) and copper SFP modules with RJ-45 connectors

(Figure A-6). See the “Supported Hardware” section on page 1-14 for a list of

supported SFP modules.

Figure A-5 Fiber-Optic SFP Module LC Connector

Warning

Invisible laser radiation may be emitted from disconnected fibers or

connectors. Do not stare into beams or view directly with optical instruments.

Statement 1051

Figure A-6 Copper SFP Module RJ-45 Connector

58476

60915

231 45678Pin Label

TP0+

TP0-

TP1+

TP2+

TP2-

TP1-

TP3+

TP3-

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User Guide for the Catalyst Express 520 Switches

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Appendix A Reference

Connector Specifications

Dual-Purpose Ports

The Ethernet port on a dual-purpose port uses standard RJ-45 connectors.

Figure A-7 shows the pinouts.

The SFP module slot on a dual-purpose port uses SFP modules for fiber-optic and

copper uplink ports. See the “Supported Hardware” section on page 1-14 for a list

of supported SFP modules.

Note The auto-MDIX feature is enabled by default. For configuration information for

this feature, see the Cisco Configuration Assistant online help.

Figure A-7 10/100/1000 Port Pinouts

60915

231 45678Pin Label

TP0+

TP0-

TP1+

TP2+

TP2-

TP1-

TP3+

TP3-

Appendix A Reference

Cabling Guidelines

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User Guide for the Catalyst Express 520 Switches

OL-12761-02

Cabling Guidelines

This section describes the cabling guidelines for the port connections.

•Ethernet Port Connections, page A-10

•Small Form-Factor Pluggable Module Port Connections, page A-10

Ethernet Port Connections

For copper Ethernet ports, cable lengths from the switch to connected devices

must be within 328 feet (100 meters).

Use either straight-through or crossover Category 5 cables with RJ-45 connectors

to connect from the switch Ethernet ports to other devices.

Use Category 5 cables for 100BASE-TX and 1000BASE-T traffic. Use

Category 3 or Category 4 cables for 10BASE-T traffic.

Small Form-Factor Pluggable Module Port Connections

Each port must match the wave-length specifications on the other end of the cable,

and for reliable communications, the cable must not exceed the stipulated cable

length.

The dual-purpose port can be configured as either a 10/100/1000 port or as an

small form-factor pluggable (SFP) module port.

Table A-2 lists the cable specifications for the fiber-optic SFP module

connections. Each port must match the wave-length specifications on the other

end of the cable, and for reliable communications, the cable must not exceed the

stipulated cable length.

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