Cisco Catalyst 2924M XL Guide

Corporate Headquarters: Cisco Systems, Inc., 170 West Tasman Drive, San Jose, CA 95134-1706 USA
Copyright © 2000. Cisco Systems, Inc. All rights reserved.
Using the Catalyst 2924M XL DC
Ethernet Switch
April 21, 2000
This document describes the Catalyst 2924M XL DC Ethernet switch (hereafter
referred to as the switch) and provides the instructions for rack-mounting it and
connecting it to a DC-input power source.
Note This document uses the term switch to refer to the
Catalyst 2924M XL DC switch. In this document, the term switch
does not refer to a telco device.
Contents
•“Conventions” section on page 2
•“Introduction”section on page 6
•“DC-Power Specifications and Agency Approvals”section on page 7
•“Warnings”section on page 8
•“Preparing for Installation”section on page 9

Conventions
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•“Rack-Mounting the Switch”section on page 10
•“Grounding the Switch”section on page 12
•“Wiring the DC-Input Power Source”section on page 15
•“Translated Safety Warnings”section on page 21
•“Related Documentation”section on page 38
•“Obtaining Documentation”section on page 38
•“Obtaining Technical Assistance”section on page 39
Conventions
This document uses the following conventions and symbols for notes, cautions,
and warnings:
Note Means reader take note. Notes contain helpful suggestions or
references to materials not contained in this manual.
Caution Means reader be careful. In this situation, you might do something
that could result in equipment damage or loss of data.

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Conventions
Warning This warning symbol means danger. You are in a situation that
could cause bodily injury. Before you work on any equipment, be
aware of the hazards involved with electrical circuitry and be
familiar with standard practices for preventing accidents. Tosee
translations of the warnings that appear in this publication, refer
to Appendix C, “Translated Safety Warnings.”
Waarschuwing
Dit waarschuwingssymbool betekent gevaar. U verkeert in een
situatie die lichamelijk letsel kan veroorzaken. Voordat u aan
enige apparatuur gaat werken, dient u zich bewust te zijn van de
bij elektrische schakelingen betrokken risico's en dient u op de
hoogte te zijn van standaard maatregelen om ongelukken te
voorkomen. Voor vertalingen van de waarschuwingen die in deze
publicatie verschijnen, kunt u het document Regulatory
Compliance and Safety Information (Informatie over naleving van
veiligheids- en andere voorschriften) raadplegen dat bij dit
toestel is ingesloten.
Varoitus
Tämävaroitusmerkki merkitsee vaaraa. Olet tilanteessa, joka voi
johtaa ruumiinvammaan. Ennen kuin työskentelet minkään
laitteiston parissa, ota selvää sähkökytkentöihin liittyvistä
vaaroista ja tavanomaisista onnettomuuksien ehkäisykeinoista.
Tässäjulkaisussa esiintyvien varoitusten käännökset löydät
laitteen mukana olevasta Regulatory Compliance and Safety
Information -kirjasesta (määräysten noudattaminen ja tietoa
turvallisuudesta).

Conventions
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Attention
Ce symbole d’avertissement indique un danger. Vous vous trouvez
dans une situation pouvant causer des blessures ou des
dommagescorporels.Avantdetravaillersurunéquipement,soyez
conscient des dangers posés par les circuits électriques et
familiarisez-vous avec les procédures couramment utilisées pour
éviter les accidents. Pour prendre connaissance des traductions
d’avertissements figurant dans cette publication, consultez le
document Regulatory Compliance and Safety Information
(Conformitéaux règlements et consignes de sécurité) qui
accompagne cet appareil.
Warnung
Dieses Warnsymbol bedeutet Gefahr. Sie befinden sich in einer
Situation, die zu einer Körperverletzung führen könnte. Bevor Sie
mit der Arbeit an irgendeinem Gerät beginnen, seien Sie sich der
mit elektrischen Stromkreisen verbundenen Gefahren und der
Standardpraktiken zur Vermeidung von Unfällen bewußt.
Übersetzungen der in dieser Veröffentlichung enthaltenen
Warnhinweise finden Sie im Dokument Regulatory Compliance
and Safety Information (Informationen zu behördlichen
Vorschriften und Sicherheit), das zusammen mit diesem Gerät
geliefert wurde.
Avvertenza
Questo simbolo di avvertenza indica un pericolo. La situazione
potrebbe causare infortuni alle persone. Prima di lavorare su
qualsiasi apparecchiatura, occorre conoscere i pericoli relativi
ai circuiti elettrici ed essere al corrente delle pratiche standard
per la prevenzione di incidenti. La traduzione delle avvertenze
riportate in questa pubblicazione si trova nel documento
Regulatory Compliance and Safety Information (Conformitàalle
norme e informazioni sulla sicurezza) che accompagna questo
dispositivo.
Advarsel
Dette varselsymbolet betyr fare. Du befinner deg i en situasjon
som kan føre til personskade. Før du utfører arbeid påutstyr, må
duvareoppmerksompådefaremomentenesomelektriske kretser
innebærer,samtgjøredegkjentmedvanligpraksisnår detgjelder
åunngåulykker. Hvisduvilseoversettelserav deadvarslene som
finnes i denne publikasjonen, kan du se i dokumentet Regulatory
ComplianceandSafetyInformation(Overholdelseavforskrifterog
sikkerhetsinformasjon) som ble levert med denne enheten.

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Conventions
Aviso
Este símbolo de aviso indica perigo. Encontra-se numa situação
que lhe poderácausar danos físicos. Antes de começar a
trabalhar com qualquer equipamento, familiarize-se com os
perigos relacionados com circuitos eléctricos, e com quaisquer
práticas comuns que possam prevenir possíveis acidentes. Para
ver as traduções dos avisos que constam desta publicação,
consulte o documento Regulatory Compliance and Safety
Information (Informação de Segurança e Disposições
Reguladoras) que acompanha este dispositivo.
¡Advertencia!
Este símbolo de aviso significa peligro. Existe riesgo para su
integridad física. Antes de manipular cualquier equipo,
considerar los riesgos que entraña la corriente eléctrica y
familiarizarse con los procedimientos estándar de prevención de
accidentes. Para ver una traducción de las advertencias que
aparecen en esta publicación, consultar el documento titulado
RegulatoryComplianceandSafetyInformation(Informaciónsobre
seguridad y conformidad con las disposiciones reglamentarias)
que se acompaña con este dispositivo.
Varning!
Denna varningssymbol signalerar fara. Du befinner dig i en
situation som kan leda till personskada. Innan du utför arbete på
någon utrustning måste du vara medveten om farorna med
elkretsar och känna till vanligt förfarande för att förebygga
skador. Se förklaringar av de varningar som förkommer i denna
publikation i dokumentet Regulatory Compliance and Safety
Information (Efterrättelse av föreskrifter och
säkerhetsinformation), vilket medföljer denna anordning.

Introduction
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Introduction
The Catalyst 2924M XL DC switch is equipped with an on-board direct-current
(DC) power converter. The DC-power converter has dual feeds (A and B) that are
diode OR’d into a single power block.
The front panel of the switch provides 24 10/100 ports, 2 high-speed expansion
slots, a set of LEDs, and a Mode button. The rear panel of the switch (Figure 1)
provides an RJ-45 console port, a ground lug, and a DC power connector (also
referred to as the terminal block header). The switch is shipped with a terminal
block plug inserted in the DC power connector. For more information about the
front and rear panels of the switch, refer to the Catalyst 2900 Series XL
Installation Guide.
Figure 1 Back Panel of the Switch
31692
CONSOLE
INPUT: 36 - 72
CURRENT: 4-2A
+–
A+–
B
REFER TO MANUAL
BEFORE CONNECTING
POWER

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DC-Power Specifications and Agency Approvals
DC-Power Specifications and Agency Approvals
The switch is for use in DC operating environments and has the following
power-source specifications and agency approvals:
Table 1 Power Specifications for the Catalyst 2924M XL DC Switch
Description Design Specification
Power 100W, –36 to –72 VDC
Wire gauge for power connections 12 or 14 AWG1(6 AWG for protective earth)
1. AWG = American Wire Gauge
Branch circuit protection 5A
Table 2 Agency Approvals
Safety EMC NEBS
UL 1950/CSA 22.2 No. 950 FCC Part 15 Class A GR-1089
IEC 950/EN 60950 EN 55022, EN 50082-1 Class A
(CISPR 22 Class A) GR-63
NOM 019 VCCI Class A
CE AS/NZS 3548 Class A
BSMI
CE

Warnings
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Warnings
Warning The customer 48V power system must provide reinforced
insulation between the primary AC power and the 48-VDC output.
Warning The Catalyst 2924M XL DC switch is intended for Local Area
Network (LAN) connections only. This unit is not certified for use
in Public Telephone Networks.
Warning The Catalyst 2924M XL DC switch contains no field-replaceable
units (FRUs). Do not open the chassis or attempt to remove or
replace any components. For information about obtaining service
for this unit, contact your reseller or Cisco sales representative.
Warning Readtheinstallationinstructionsbeforeyouconnectthesystemto
its power source.
Warning Connect the equipment to a single, extra-low voltage (SELV)
source.
Warning This equipment is to be installed in a restricted access area.
Warning Ethernet cables must be shielded when used in a central office
environment.

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Preparing for Installation
Preparing for Installation
Follow these steps before rack-mounting and grounding the switch or wiring it to
a DC-input power source.
Step 1 Unpack the shipping box, and verify its contents. In addition to the items
described in the Catalyst 2900 Series XL Installation Guide, the switch is shipped
with a DC terminal block plug installed on the switch back panel.
Step 2 Obtain the following necessary tools and equipment:
•Ratcheting torque screwdriver with a Phillips head that exerts up to
15 pound-force inches (lbf-in.) of pressure
•Panduit crimping tool with optional controlled cycle mechanism, model
CT-700, CT-720, CT-920, CT-930, CT-920CH, or CT-940CH
•6-gauge copper ground wire (insulated or noninsulated)
•Four leads of 12- or 14-gauge copper wire
•Wire-stripping tool(s) for stripping both 6- and 12- or 14-gauge wires

Rack-Mounting the Switch
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Rack-Mounting the Switch
The rack-mounting brackets supplied with the switch can be attached to a 19-, 23-,
or 24-inch rack.
28847
19" rack
ount point
19" rack
ount point
24" rack
mount point
24" rack
mount point
23" rack
mount point
23" rack
mount point

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Rack-Mounting the Switch
Follow these steps to center-mount the switch in a 23-inch rack. For information
about installing the switch in a 19- or 24-inch rack, refer to the
Catalyst 2900 Series XL Installation Guide.
Step 1 Place the switchon a level surface, and use the supplied Phillips truss-head screws
to attach the short side of the bracket to each side of the switch. Secure all four
screws tightly, but do not overtighten them.
Step 2 Use two of the supplied Phillips machine screws to securely attach each bracket
to the rack.
31694
Phillips
truss-head
screws
INPUT: 36 - 72
CURRENT: 4-2A
+–
A+–
B
Phillips machine screws
31695
INPUT: 36 - 72
CURRENT: 4-2A
+–
A+–
B

Grounding the Switch
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Grounding the Switch
Warning This equipment is intended to be grounded. Ensure that the host is
connected to earth ground during normal use.
Warning When installing the unit, the ground connection must always be
made first and disconnected last.
Follow these steps to ground the switch to earth ground. Make sure to follow any
grounding requirements at your site.
Step 1 Use a standard Phillips screwdriver or a ratcheting torque screwdriver with a
Phillips head to remove the two number-10-16 ground-lug screws and the ground
lug from the rear panel of the switch.
CONSOLE
31697
INPUT: 36 - 72
CURRENT: 4-2A
+–
A+–
B
REFER TO MANUAL
BEFORE CONNECTING
POWER

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Grounding the Switch
Step 2 Set the screws and the ground lug aside.
Step 3 If your ground wire is insulated, use a wire-stripping tool to strip the 6-gauge
ground wire to 0.5 inch ±0.05 inch as shown in this figure:
Step 4 Slide the open end of the ground lug over the exposed area of the 6-gauge wire.
Step 5 Using a Panduit crimping tool, crimp the ground lug to the 6-gauge wire.
Insulation Wire lead
0.50" ± 0.05"
33024
10360

Grounding the Switch
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Step 6 Use the two number-10-16 screws to attach the ground lug and wire assembly to
the rear panel of the switch.
Step 7 Using a ratcheting torque screwdriver, torque each ground-lug screw to 15 1bf-in.
(or 240 ounce-force inches [240 ozf-in.]).
CONSOLE
Torque to
15 lbf-in.
31698
INPUT: 36 - 72
CURRENT: 4-2A
+–
A+–
B
REFER TO MANUAL
BEFORE CONNECTING
POWER

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Wiring the DC-Input Power Source
Wiring the DC-Input Power Source
Warning Only trained and qualified personnel should be allowed to install
or replace this equipment.
Warning Before performing any of the following procedures, ensure that
power is removed from the DC circuit. To ensure that all power is
OFF, locate the circuit breakeron the panel boardthat services the
DC circuit, switch the circuit breaker to the OFF position, and tape
the switch handle of the circuit breaker in the OFF position.
Caution The switch is to be installed with 5A-branch-circuit protection.
Note This installation must comply with all applicable codes.
Follow these steps for wiring the switch to a DC-input power source.
Step 1 Locate this terminal block plug. It is shipped already inserted in the DC power
connector on the switch back panel.
10362

Wiringthe DC-Input Power Source
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Step 2 Identify the positive and negative feed positions for the terminal block
connection. The wiring sequence is Return to Return and negative to negative for
both the A feed wires and the B feed wires. The rear panel of the switch identifies
the positive and negative positions for both the A and B feed wires.
Step 3 Using a 12- or 14-gauge wire-stripping tool, strip each of the four wires coming
from the DC-input power source to 0.27 inch ±0.05 inch. Do not strip more than
0.29 inches of insulation from the wire. Stripping more than the recommended
amount of wire can leave exposed wire from the terminal block plug after
installation.
31693
0.27" ± 0.05"
33025

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Wiring the DC-Input Power Source
Step 4 Insert the exposed wire of one of the four DC-input power source wires into the
terminal block plug. Make sure that you cannot see any wire lead. Only wire with
insulation should extend from the terminal block plug.
Warning An exposed wire lead from a DC-input power source can conduct
harmfullevels ofelectricity. Besurethatno exposedportionofthe
DC-input power source wire extendsfrom the terminal block plug.
10364
Return
Negative
Return
Feed A
Feed B
Negative

Wiringthe DC-Input Power Source
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Step 5 Use a ratcheting torque screwdriver to torque the terminal block captive screw
(above the installed wire lead) to 4.5 1bf-in. (72 ozf-in.).
Caution Do not overtorque the terminal-block captive screws. The
recommended maximum torque is 4.5 lbf-in. (72 ozf-in.).
10365
Torque to 4.5 lbf-in.

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Wiring the DC-Input Power Source
Step 6 Repeat steps 4 and 5 for the remaining three DC-input power source wires. The
following figure shows the completed wiring of a terminal block plug.
10366
Return
Negative
Return
Negative
Feed A
Feed B

Wiringthe DC-Input Power Source
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Step 7 Insert the terminal block plug into the terminal block header on the rear panel of
the switch as shown in the figure.
Caution Secure the wires coming from the terminal block so that they will not
be disturbed by casual contact. For example, use tie wraps to secure
the wires to a rack.
Step 8 Remove the tape from the circuit-breaker switch handle, and restore power by
moving the circuit breaker handle to the on position.
CONSOLE
Tie wrap
31699
INPUT: 36 - 72
CURRENT: 4-2A
+–
A+–
B
REFER TO MANUAL
BEFORE CONNECTING
POWER