Cisco Catalyst Express 520 User manual

A-1
User Guide for the Catalyst Express 520 Switches
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APPENDIX
A
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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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
1
202294
SN: XXXNNNNXXXX

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Appendix A Reference
Connector Specifications
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
1
2
3
4
5
6
7
8
RD+
RD-
TD+
NC
NC
TD-
NC
NC

Appendix A Reference
Connector Specifications
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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
1
2
3
4
5
6
7
8
TP0+
TP0-
TP1+
TP2+
TP2-
TP1-
TP3+
TP3-

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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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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
1
2
3
4
5
6
7
8
TP0+
TP0-
TP1+
TP2+
TP2-
TP1-
TP3+
TP3-

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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
1
2
3
4
5
6
7
8
TP0+
TP0-
TP1+
TP2+
TP2-
TP1-
TP3+
TP3-

Appendix A Reference
Cabling Guidelines
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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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Appendix A Reference
Cabling Guidelines
Note When using shorter distances of single-mode fiber cable, you might need to insert
an inline optical attenuator in the link to avoid overloading the receiver.
Table A-2 Fiber-Optic SFP-Module Port Cabling Specifications
SFP Module
Wavelength
(nanometers) Fiber Type
Core Size
(micron)
Modal
Bandwidth
(MHz/km) Cable Distance
100BASE-BX-10D 1550 SMF G.6522— 32,810 ft (10 km)
100BASE-BX-10U 1310 SMF G.6522— 32,810 ft (10 km)
100BASE-FX-FE
100BASE-FX-GE
Min.: 1270
Typical: 1300
Max.: 1380
MMF 50/125
62.5/125
500 6,562 feet (2 km)
100BASE-LX 1310 SMF G.6522— 32,810 ft (10 km)
1000BASE-LX/LH 1300 MMF1
SMF
1. A mode-conditioning patch cable is required. Using an ordinary patch cable with MMF, 1000BASE-LX/LH SFP modules,
and a short link distance can cause transceiver saturation, resulting in an elevated bit error rate (BER). When using the LX/LH
SFP module with 62.5-micron diameter MMF, you must also install a mode-conditioning patch cable between the SFP
module and the MMF cable on both the sending and receiving ends of the link. The mode-conditioning patch cable is required
for link distances greater than 984 feet (300 m).
62.5
50
50
9/10
500
400
500
—
1804 feet (550 m)
1804 feet (550 m)
1804 feet (550 m)
32,810 feet (10 km)
1000BASE-SX 850 MMF 62.5
62.5
50
50
160
200
400
500
722 feet (220 m)
902 feet (275 m)
1640 feet (500 m)
1804 feet (550 m)

Appendix A Reference
Cabling Guidelines
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For SMF connections, use one of the LCs listed in Table A-3 or Table A-4. For
MMF connections, use one of the LCs listed in Table A-5. Use the Cisco part
numbers to order the patch cables that you need, or order patch cables from your
vendor.
Table A-3 LC-to-SC Single-Mode Fiber Patch Cables (SFP-to-GBIC Connections)
Type Cisco Part Number
2-meter, LC-to-SC single-mode fiber patch cable CAB-CP-LCSC-2M
8-inch, SC-to-LC single-mode fiber patch cable CAB-CP-SCLC-8IN
10-foot, LC-to-SC single-mode fiber patch cable CAB-SMF-SC-10
100-foot, LC-to-SC single-mode fiber patch cable CAB-SMF-SC-100
25-foot, LC-to-SC single-mode fiber patch cable CAB-SMF-SC-25
50-foot, LC-to-SC single-mode fiber patch cable CAB-SMF-SC-50
75-foot, LC-to-SC single-mode fiber patch cable CAB-SMF-SC-75
Table A-4 LC-to-LC Single-Mode Fiber Patch Cables (SFP-to-SFP Connections)
Type Cisco Part Number
2-meter, LC-to-LC single-mode fiber patch cable 15454-LC-LC-2=
4-meter, LC-to-LC single-mode fiber patch cable 15216-LC-LC-5=
6-meter, LC-to-LC single-mode fiber patch cable 15216-LC-LC-10=
8-meter, LC-to-LC single-mode fiber patch cable 15216-LC-LC-20=
Table A-5 SX LC and SX LC-to-SC Multimode Fiber Patch Cables (SFP-to-SFP Connections)
Type Cisco Part Number
10-meter, SX LC multimode fiber patch cable CSS5-CABSX-LC=
10-meter, SX LC-to-SC multimode fiber patch cable CSS5-CABSX-LCSC=

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Appendix A Reference
Cable and Adapter Specifications
Cable and Adapter Specifications
These sections describe the cables and adapters used with the switch.
•Two Twisted-Pair Cable Pinouts, page A-13
•Four Twisted-Pair Cable Pinouts for 1000BASE-T Ports, page A-14
•Crossover Cable, page A-15
Two Twisted-Pair Cable Pinouts
Figure A-8 and Figure A-9 show the schematics of two twisted-pair cables for
connecting to 10BASE-T- and 100BASE-TX-compatible devices.
Figure A-8 Two Twisted-Pair Straight-Through Cable Schematic
Figure A-9 Two Twisted-Pair Crossover Cable Schematic
Switch
3TD+
6 TD–
1 RD+
2 RD–
Router or PC
3RD+
6 RD–
1 TD+
2 TD–
H5578
Switch
3TD+
6 TD–
1 RD+
2 RD–
Switch
3TD+
6 TD–
1 RD+
2 RD–
H5579

Appendix A Reference
Cable and Adapter Specifications
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Four Twisted-Pair Cable Pinouts for 1000BASE-T Ports
Figure A-10 and Figure A-11 show the schematics of four twisted-pair cables for
the 1000BASE-T SFP module ports on the switch.
Figure A-10 Four Twisted-Pair Straight-Through Cable Schematic for
1000BASE-T Ports
Figure A-11 Four Twisted-Pair Crossover Cable Schematics for 1000BASE-T
Ports
1 TP0+
2 TP0-
3TP1+
6 TP1-
1 TP0+
2 TP0-
3TP1+
6 TP1-
Switch Router or PC
4 TP2+
5 TP2-
7TP3+
8TP3-
4 TP2+
5 TP2-
7TP3+
8TP3-
65271
1 TPO+
2 TPO-
3TP1+
6 TP1-
1 TP0+
Switch Switch
2 TP0-
3TP1+
6 TP1-
4 TP2+
5 TP2-
7TP3+
8TP3-
4 TP2+
5 TP2-
7TP3+
8TP3-
65274

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Appendix A Reference
Cable and Adapter Specifications
Crossover Cable
To identify a crossover cable, compare the two modular ends of the cable. Hold
the cable ends side-by-side, with the tab at the back. The wire connected to the
pin on the outside of the left plug should be a different color from the wire
connected to the pin on the inside of the right plug. (See Figure A-12.)
Figure A-12 Identifying a Crossover Cable
Pin 1
200915
Pin 1
Pin 1 on one connector and
pin 1 on the other connector
should be different colors.

Appendix A Reference
Cable and Adapter Specifications
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