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Cisco AS5800 Power Entry Module Installation/Replacement

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Table Of Contents

Cisco AS5800 Universal Access Server Power Entry Module Installation and Replacement

Document Contents

If You Need More Information

Cisco AS5800 Universal Access Server Overview

Power Entry Module Overview

Specifications

Safety Guidelines

Telephone Wiring Guidelines

Preventing Electrostatic Discharge Damage

Safety Warnings

Removing and Replacing the Power Entry Modules

Tools and Parts Required

Removing a Power Entry Module

Replacing a Power Entry Module

Connecting to Your DC Power Source

Connecting to an AC Power Source

Verifying and Troubleshooting the Installation

FCC Compliance

Cisco Connection Online


Cisco AS5800 Universal Access Server Power Entry Module Installation and Replacement


Product Number: DS5814-DC-PEM=

The Cisco AS5800 Universal Access Server is equipped with two power entry modules (PEMs) in the dial shelf, which accept DC-input power either from your site DC source or from an optional AC-input power shelf, and distribute -48 VDC power to the dial shelf components. The PEMs provide power redundancy and load-sharing; however, a single PEM can power a fully configured system.

This document explains how to remove and replace the PEMs that make up the DC-input power supply. Also included are instructions for verifying and troubleshooting the installation.


Note   Use this document in conjunction with the Cisco AS5800 Universal Access Server Hardware Installation and Configuration Guide and Cisco AS5800 Universal Access Server Software Installation and Configuration Guide that shipped with your Cisco 5814 dial shelf.


Document Contents

The following sections are included in this document:

If You Need More Information

Cisco AS5800 Universal Access Server Overview

Power Entry Module Overview

Safety Guidelines

Removing and Replacing the Power Entry Modules

FCC Compliance

Cisco Connection Online

If You Need More Information

For information regarding the Cisco AS5800 Universal Access Server that is beyond the scope of this document or for additional information, use the following resources:

For Cisco AS5800 Universal Access Server hardware installation and maintenance information, refer to the Cisco AS5800 Universal Access Server Hardware Installation and Configuration Guide (Document Number DOC-AS5800-HICG=) that shipped with your system.

For Cisco AS5800 Universal Access Server software installation and configuration, refer to the Cisco AS5800 Universal Access Server Software Installation and Configuration Guide (Document Number DOC-AS5800-SICG=) that shipped with your system.

For international agency compliance, safety, and statutory information for wide-area network (WAN) interfaces for the Cisco AS5800 Universal Access Server, refer to the document Cisco AS5800 Universal Access Server Regulatory Compliance and Safety Information (Part Number 78-4666-xx) that shipped with your system.

To obtain general information about documentation, refer to the section "Cisco Connection Online," or call customer service at 800 553-6387, or 408 526-7208. Customer service hours are 5:00 a.m. to 6:00 p.m., Pacific time, Monday through Friday (excluding Cisco-observed holidays). You can also send e-mail to cs-rep@cisco.com, or you can refer to the Cisco Information Packet that shipped with your system.

Cisco Documentation CD-ROM package

Cisco documentation and additional literature are available in a CD-ROM package, which ships with your product. The Documentation CD-ROM, a member of the Cisco Connection Family, is updated monthly; therefore, it might be more current than printed documentation. To order additional copies of the Documentation CD-ROM, contact your local sales representative or call customer service. The CD-ROM package is available as a single package or as an annual subscription. You can also access Cisco documentation on the World Wide Web at http://www.cisco.com, http://www-china.cisco.com, or http://www-europe.cisco.com.

If you are reading Cisco product documentation on the World Wide Web, you can submit comments electronically. Click Feedback on the toolbar, and then select Documentation. After you complete the form, click Submit to send it to Cisco. We appreciate your comments.

For additional Cisco IOS software information, refer to the following modular configuration and modular command reference publications, as appropriate for your configuration:

Configuration Fundamentals Configuration Guide

Configuration Fundamentals Command Reference

Dial Solutions Configuration Guide

Wide-Area Networking Configuration Guide

Wide-Area Networking Command Reference

Network Protocols Configuration Guide

Network Protocols Command Reference

Configuration Builder Getting Started Guide

Troubleshooting Internetworking Systems

Debug Command Reference

System Error Messages

Cisco IOS Software Command Summary

Cisco Management Information Base (MIB) User Quick Reference

Cisco AS5800 Universal Access Server Overview

The Cisco AS5800 Universal Access Server is a high-density, ISDN and modem WAN aggregation system that provides both digital and analog call termination. It is intended to be used in service provider dial point-of-presence (POP), or centralized enterprise dial environments. The Cisco AS5800 Universal Access Server chassis components include a Cisco 5814 dial shelf and a Cisco 7206 router shelf. An optional AC power shelf is also available.

The dial shelf and router shelf are bundled, and can be ordered to support either AC or DC power. Included in the dial shelf is a blower assembly, filter module, and DC-input power entry modules (PEMs). Also included in the bundled system are ingress trunk cards, modem cards, dial shelf controller cards, Flash memory PCMCIA cards, cables, and Cisco IOS software. The dial shelf feature cards and host router shelf communicate via a dial shelf interconnect cable.

The dial shelf contains 14 slots (numbered 0 through 13 on the backplane) and can support up to 10 modem cards, 2 trunk cards, and 2 dial shelf controller cards (in the near future). The router shelf supports the dial shelf and performs all routing and packet processing. The router shelf also houses the main system software images.

shows a front view of a fully configured Cisco AS5800 Universal Access Server, and shows a rear view.

Figure 1 Cisco AS5800 Universal Access Server—Front View

Figure 2 Cisco AS5800 Universal Access Server—Rear View

Power Entry Module Overview

The Cisco AS5800 Universal Access Server is equipped with two power entry modules (PEMs) in the dial shelf, which accept DC-input power either from your site DC source or from an optional AC-input power shelf, and distribute -48 VDC power to the dial shelf components. The PEMs provide power redundancy and loadsharing; however, a single PEM can power a fully configured system.


Note   Whenever possible, we recommend that you connect each PEM to a separate DC power source.


The PEMs and the filter module are cooled by system air flow, which flows from the top to the back of the dial shelf chassis. The front and sides of the PEMs are perforated for minimum air flow restriction.

The PEMs support the following functions:

Power redundancy and load sharing

The DC-input power supply provides redundant power by design. During normal operation, the two PEMs provide system power simultaneously (load share). When you remove one PEM, the remaining PEM immediately ramps up to provide full power and to maintain uninterrupted system power.

System environmental monitoring

A 10-pin connector monitors system environmental status and communicates this status from each PEM to the filter module maintenance bus (MBus). lists connector pin definitions supporting system status signals.

Table 1 Connector Pin Definitions

Pin
Description
Pin
Description

1

-48V monitor

6

Not used

2

Not used

7

Not used

3

Breaker connect

8

-48V return monitor

4

Current monitor

9

Not used

5

Voltage monitor

10

15V_BIAS


Voltage level and current monitoring

The DC-input power supply is designed to prevent any energy hazard during operation. DC power is first routed to a circuit breaker, followed by a surge protector. In addition, an isolation diode circuit protects against possible DC-input failure.

The DC-input power supply monitors analog output voltage and current. The battery side of the DC-input is equipped with a 60-ampere circuit breaker, which trips if current reaches peak parameters for two seconds. The DC-input power supply circuits are described in .

If a PEM is not properly seated in the Cisco 5814 dial shelf backplane, an electronic circuit, or interlock, trips a breaker in the PEM and terminates power to the output connectors. This same interlock provides reverse polarity protection when the system is powered off.

Table 2

Circuit
Description

Circuit breaker

PEM output is enabled when this pin is shorted to the -48Vmonitor pin via the backplane. If the connection is broken, the breaker is tripped and cannot be reset until the PEM is reinstalled.

Reverse polarity

An electronic interlock that provides reverse polarity protection.

Current monitor

Analog output voltage is proportional to DC-output current from the PEM to the backplane, as follows: 1 amp of current is equivalent to 100 mV at the current monitor pin.

Voltage monitor

Analog output voltage is proportional to DC-output current from the PEM to the backplane, as follows: 1 amp of current is equivalent to 100 mV at the voltage monitor pin.

Bell alarm

A terminal block for connecting to central office alarms (C, NC, NO)


DC-input Power Supply Circuits


Note   Connect the alarm port only to a safety extra-low voltage (SELV) source rated maximum 50VA, 2A.


Bell alarm signaling

The PEMs provide relay outputs for standard central office bell alarms. These bell alarm contacts are available on a terminal plug mounted on the PEM front panel.

Online insertion and removal (OIR)

The PEMs support OIR, which means you can remove or replace a PEM while the system is operating; system operation will not be affected.

The PEMs are located on either side of the filter module below a removable rear cover. You install the PEMs in the dial shelf from the back of the dial shelf chassis and plug them into the backplane.

shows the location of the PEMs as viewed from the dial shelf rear.

Figure 3 Power Entry Modules—Dial Shelf Rear

The PEMs contain two LEDs on the front panel—POWER and MISWIRE. The power LED indicates that input voltage is present, and the PEM circuit breaker is on; the miswire LED should remain off, but lights if the two DC conductors entering the PEM DC-input power terminal block (see ) are reversed.

Specifications

The PEMs provide -48V DC power, which is distributed through the filter module to the dial shelf backplane. 15 VDC is provided to the analog isolators in the filter module. The PEMs suffer no damage if any or all outputs have no load (no load occurs when there are no cards plugged into the backplane), or if the maximum input voltage is exceeded; however, input voltages that exceed 75 volts will eventually trip the PEM 60-amp circuit breaker, and you might have to reset the breaker as needed.

lists DC output voltage and current specifications.

Table 3

Power
Description

Voltage to backplane

Maximum
Nominal
Minimum

-38 VDC
-48 VDC
-75 VDC

Current

Minimum (SS)
Nominal (SS)
Maximum (SS)
Peak (2 sec)

3.0A
42A
54.0A
60.0A

Circuit breaker

50A


Power Entry Module Power Specifications

lists the DC-input power supply environmental specifications, which are designed to meet NEC, NEBS, and ETSI requirements.

Table 4

Specification
Description

Cooling

Maximum inlet air temperature is 131° F (55° C)

Temperature

Operating
Nonoperating

23° F to 131° F (-5° C to 55° C)
-13° F to 158° F (-25° C to +70° C)

Humidity

Operating
Nonoperating

10% to 90%, noncondensing
10% to 95%, noncondensing

Altitude

Operating
Nonoperating

9,843 ft (3,000 m) at 104° F (40° C)
15,000 ft (4,570 m) over allowable temperature range

Thermal shock

Operating
Nonoperating

23° F to 113° F (-5° C to 45° C) at 0.5° C per minute
-13° F to 158° F (-25° C to 70° C) with changeover time between 2 and 3 minutes

Vibration

Operating
Nonoperating

1.12 Grms from 3 to 500 Hz
2 Grms from 3 to 500 Hz

Regulatory compliance

ENG-5769
UL 1950
CSA 22.2-950-95
EN 60 950
ACA TS001, AS3260


Power Entry Module Environmental Specifications

Safety Guidelines

This section provides safety and ESD-prevention guidelines to help you avoid injury to yourself and avoid damage to the equipment.The following safety guidelines are recommended when working with any equipment that connects to electrical power or telephone wiring:

Locate the emergency power-off switch for the room in which you are working before beginning any procedures requiring access to the chassis interior.

Disconnect all power and external cables before moving a chassis.

Never work alone when potentially hazardous conditions exist.

Never assume that power has been disconnected from a circuit; always check.

Never perform any action that creates a potential hazard to people or makes the equipment unsafe.

Carefully examine your work area for possible hazards such as moist floors, ungrounded power extension cables, and missing safety grounds.

A 60-ampere DC circuit breaker is recommended for the DC-input power source. This circuit breaker should protect against short-circuit and overcurrent faults in accordance with United States National Electrical Code NFPA 70 (United States), Canadian Electrical Code, part I, C22.1 (Canada), and IEC 364 (other countries).

Only a DC power source that complies with the Safety Extra-Low Voltage (SELV) requirements in UL1950, CSA 950, EN 60950, and IEC950 can be connected to the DC-input power supply.

A readily accessible disconnect device must be incorporated in the fixed wiring.

This unit is to be installed in a restricted access area in accordance with articles 110-16, 110-17, Preventing Electrostatic Discharge Damage

Always power OFF the power source circuit breaker and ensure the PEM power switch is in the OFF (O) position before accessing the terminal blocks.


Caution   
Terminal blocks may be energized. Ensure that the power source circuit breaker is disconnected, and the PEM power switch is in the OFF (O) position before accessing terminals.


Note   Each PEM operating at -48 VDC in North America requires a minimum of 14A service. Each PEM operating at -60 VDC in the European Conmunity requires a minimum of 8A service.



Note   The color coding of the DC-input power supply leads depends on the color coding of the DC power source at your site. Typically, green or green/yellow is used for ground, black is used for +48V (return), and red or white is used for -48V. Make certain the lead color coding you choose for the DC-input power supply matches lead color coding used at the DC power source.


Telephone Wiring Guidelines

The following guidelines are recommended when working with any equipment that is connected to telephone wiring or to other network cabling:

Never install telephone wiring during a lightning storm.

Never install telephone jacks in wet locations unless the jack is specifically designed for wet locations.

Never touch uninsulated telephone wires or terminals unless the telephone line has been disconnected at the network interface.

Always use caution when installing or modifying telephone lines.

Preventing Electrostatic Discharge Damage

Electrostatic discharge (ESD) damages equipment and impairs electrical circuitry. ESD occurs when printed circuit boards are improperly handled, and results in complete or intermittent failures.

The system feature cards and dial shelf controller cards consist of a printed circuit board that is fixed in a metal carrier. Electromagnetic interference (EMI) shielding, connectors, and a handle are integral components of the carrier. Handle the system feature cards and dial shelf controller cards by their carrier edges and ejector levers only; never touch the printed circuit board components or connector pins.

Although the metal carrier helps to protect the printed circuit boards from ESD, wear a preventive antistatic strap whenever handling the dial shelf feature cards or dial shelf controller cards, or the router shelf network processing engine, I/O controller, or port adapters. Ensure that the strap makes good skin contact and connect the strap's clip to an unpainted chassis surface to safely channel unwanted ESD voltages to ground.

If no wrist strap is available, ground yourself by touching the metal part of the chassis.

The following guidelines are recommended to prevent ESD damage:

Always use an ESD wrist strap or ankle strap when installing or replacing system components. Ensure that the ESD strap makes contact with your skin.

Handle all system components by their metal carrier edges and handles only; avoid touching the printed circuit board components or any connector pins.

Place all system components that have been removed on an antistatic surface with the printed circuit board components facing upward, or in a static shielding bag. If you are returning system components to the factory, immediately place them in static shielding bags.

Safety Warnings

Safety warnings appear throughout this publication in procedures that, if performed incorrectly, may harm you. A warning symbol precedes each warning statement.


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. To see translations of the warnings that appear in this publication, refer to the Regulatory Compliance and Safety Information document that accompanied this device.


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  Tämä varoitusmerkki merkitsee vaaraa. Olet tilanteessa, joka voi johtaa ruumiinvammaan. Ennen kuin työskentelet minkään laitteiston parissa, ota selvää sähkökytkentöihin liittyvistä vaaroista ja tavanomaisista onnettomuuksien ehkäisykeinoista. Tässä julkaisussa esiintyvien varoitusten käännökset löydät laitteen mukana olevasta Regulatory Compliance and Safety Information -kirjasesta (määräysten noudattaminen ja tietoa turvallisuudesta).

Attention  Ce symbole d'avertissement indique un danger. Vous vous trouvez dans une situation pouvant causer des blessures ou des dommages corporels. Avant de travailler sur un équipement, 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 (Conformité aux 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 (Conformità alle 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 på utstyr, må du vare oppmerksom på de faremomentene som elektriske kretser innebærer, samt gjøre deg kjent med vanlig praksis når det gjelder å unngå ulykker. Hvis du vil se oversettelser av de advarslene som finnes i denne publikasjonen, kan du se i dokumentet Regulatory Compliance and Safety Information (Overholdelse av forskrifter og sikkerhetsinformasjon) som ble levert med denne enheten.

Aviso  Este símbolo de aviso indica perigo. Encontra-se numa situação que lhe poderá causar 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 Regulatory Compliance and Safety Information (Información sobre 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.

Removing and Replacing the Power Entry Modules

This section provides a list of tools and parts you need, and explains how to remove and replace the PEMs in the dial shelf chassis.


Warning   

Before completing any of the following steps, and to prevent short-circuit or shock hazards, ensure that power is removed from the DC-input or optional AC-input circuit. To ensure that all power is off, locate the circuit breaker on the panel board that services the DC-input or optional AC-input circuit, switch the circuit breaker to the OFF (O) position, and tape the switch handle of the circuit breaker in the OFF (O) position.



Warning   

When installing the unit, the ground connection must always be made first and disconnected last.



Caution   
If your system requires the AC-input power shelf for AC-to-DC conversion, you should schedule a time for system maintenance and replace the PEM at that time. Refer to the document AC-Input Power Shelf and Power Supply Installation and Replacement (Part Number 78-4659-xx) for installation and replacement instructions.


Note   The color coding of the DC-input power supply leads depends on the color coding of the DC power source at your site. Typically, green or green/yellow is used for ground, black is used for +48V (return), and red or white is used for -48V. Verify the lead color coding you choose for the DC-input power supply matches lead color coding used at the DC power source.


Tools and Parts Required

The following parts and tools are required to remove and replace the PEMs. If you need additional equipment, contact a service representative for ordering information.

A new PEM (DS5814-DC-PEM=)

6 American Wire Gauge (or 10 mm2) cable rated for at least 140o F (60o C) (for new DC-input power supply installations)

Standard wire stripper

Number 2 Phillips screwdriver

1/4-inch flat-blade screwdriver

ESD-preventive wrist strap

Removing a Power Entry Module

The following procedure for hot swapping a PEM assumes you are not using the optional AC-input power shelf, and that each PEM in your dial shelf is connected to a separate DC power source. If you are removing and replacing a PEM in an AC-configured system, you must perform the replacement during a scheduled maintenance time and power off the entire system.


Warning   

Before working on equipment that is connected to power lines, remove jewelry (including rings, necklaces, and watches). Metal objects will heat up when connected to power and ground and can cause serious burns or weld the metal object to the terminals.


To remove a PEM, complete the following steps:


Step 1 Power OFF the central office circuit breaker connected to the PEM you are removing and tape the switch in the OFF position.

Step 2 Attach an ESD-preventive wrist strap between you and an unpainted chassis surface.

Step 3 Power OFF the power switch located on the PEM front panel. (See .)


Caution   
Terminal blocks may be energized. Ensure that the power source circuit breaker is disconnected, and the PEM power switch is in the OFF (O) position before accessing terminals.

Figure 4 PEM Front Panel

Step 4 Using a 1/4-inch flat-blade screwdriver, disconnect the DC cables from the DC-input power terminal block. (See .)

Step 5 Unplug the alarm cable from the bell alarm terminal block. (See .)

Step 6 Using a 1/4-inch flat-blade screwdriver, loosen the captive screws on the PEM front panel.

Step 7 Grasp the handle and carefully pull the PEM from the backplane connectors using a gentle rocking motion; then remove the PEM from the DC power supply chassis. (See .)

Figure 5 Removing and Replacing a PEM

This completes the PEM removal process. Proceed to the section "Replacing a Power Entry Module."

Replacing a Power Entry Module

To install a new PEM, complete the following steps. (Refer to to locate the PEMs in the dial shelf.)


Step 1 Grasp the PEM handle and carefully align the PEM with the DC-input power supply bay.

Step 2 Slide the PEM into the power supply bay until it is fully seated and connected to the backplane connectors.

Step 3 Using a 1/4-inch flat-blade screwdriver, tighten the captive screws on the PEM front panel.

Step 4 Plug the alarm cables into the bell alarm terminal block. (See .)

This completes the procedure for replacing a PEM in the dial shelf. To connect the PEM power cables and power on the PEM, proceed to the section "Connecting to Your DC Power Source."


Note   If you are connecting to an AC power source, refer to the section "Connecting to an AC Power Source."


Connecting to Your DC Power Source

If your site has access to a DC power source, you need to provide your own DC power cables. In the United States you need to use 6 AWG stranded or solid copper wire; elsewhere use 16 mm2 solid or 10 mm2 stranded copper wire.

To reconnect the PEM to your DC-input power source, complete the following steps:


Step 1 Locate the DC terminal block located on the dial shelf PEM front panel and loosen the connector screws using a 1/4-inch flat-blade screw driver. (See .)

Step 2 Strip the DC power cable of its outer insulation to expose about 1/2-inch of copper wires.

Step 3 Connect the power cable stripped wires to the DC terminal block on the PEM and securely tighten the terminal block connector screws. (See )

Figure 6 Power Entry Module (PEM) DC Terminal Block

Step 4 Connect the other end of your DC power cables to your DC power source.

Step 5 Repeat Step 1 through Step 4 to connect your DC power cables to the second PEM.


Note   If the two DC conductors entering the PEM terminal block are reversed, a yellow warning LED on the PEM lights to indicate a miswire. No damage will occur; however, you must power OFF the power at the source and reverse the connections.


Step 6 Power ON the central office circuit breaker connected to the PEM you are replacing.

Step 7 Power ON ( | ) the power switch located on the PEM front panel. (See .)

This completes the procedure for replacing a PEM and connecting to your DC power source. Proceed to the section "Verifying and Troubleshooting the Installation" for installation troubleshooting tips.

Connecting to an AC Power Source

If you are using the optional AC-input power shelf, you cannot remove and replace a PEM while the system is powered on.


Caution   
If your system requires the AC-input power shelf for AC-to-DC conversion, you should schedule a time for system maintenance and replace the PEM at that time. Refer to the document AC-Input Power Shelf and Power Supply Installation and Replacement (Part Number 78-4659-xx) for installation and replacement instructions.

Verifying and Troubleshooting the Installation

To complete the installation, verify the power supply LEDs operate properly and that you have wired the DC-input connections correctly. Each PEM contains two LEDs on the front panel—POWER and MISWIRE. (Refer to .)

Verify the power LED is on.

If neither the power nor the miswire LED is on, check the voltage at the DC-input terminal block. If the voltage reading falls between -40 VDC and -60 VDC, replace the PEM.

Verify the miswire LED remains off.

If the miswire LED is on, the two DC conductors entering the PEM DC-input terminal block are reversed; no damage will occur. Power OFF power at the source and reverse the connections.

This completes the procedures for installing and troubleshooting a power entry module. If you have questions or need assistance, proceed to the section "Cisco Connection Online."

FCC Compliance

Regulatory compliance and safety information is contained in the Regulatory Compliance and Safety Information document that shipped with your system.

Cisco Connection Online

Cisco Connection Online (CCO) is Cisco Systems' primary, real-time support channel. Maintenance customers and partners can self-register on CCO to obtain additional content and services.

Available 24 hours a day, seven days a week, CCO provides a wealth of standard and value-added services to Cisco's customers and business partners. CCO services include product information, software updates, release notes, technical tips, the Bug Navigator, configuration notes, brochures, descriptions of service offerings, and download access to public and authorized files.

CCO serves a wide variety of users through two interfaces that are updated and enhanced simultaneously—a character-based version and a multimedia version that resides on the World Wide Web (WWW). The character-based CCO supports Zmodem, Kermit, Xmodem, FTP, and Internet e-mail, and is excellent for quick access to information over lower bandwidths. The WWW version of CCO provides richly formatted documents with photographs, figures, graphics, and video, as well as hyperlinks to related information.

You can access CCO in the following ways:

WWW:  http://www.cisco.com

WWW:  http://www-europe.cisco.com

WWW:  http://www-china.cisco.com

Telnet:  cco.cisco.com

Modem:  From North America, 408 526-8070; from Europe, 33 1 64 46 40 82. Use the following terminal settings: VT100 emulation; databits: 8; parity: none; stop bits: 1; and connection rates up to 28.8 kbps.

For a copy of CCO's Frequently Asked Questions (FAQ), contact cco-help@cisco.com. For additional information, contact cco-team@cisco.com.


Note   If you are a network administrator and need personal technical assistance with a Cisco product that is under warranty or covered by a maintenance contract, contact Cisco's Technical Assistance Center (TAC) at 800 553-2447, 408 526-7209, or tac@cisco.com. To obtain general information about Cisco Systems, Cisco products, or upgrades, contact 800 553-6387, 408 526-7208, or cs-rep@cisco.com.


78-4656-01