Table Of Contents
Installing the Cisco 3725 Redundant Power Supply Interface Module in the Cisco 3725 Router
Purpose
Audience
Scope
Content
Safety Information
Working Safely with Electricity
Preventing Electrostatic Discharge Damage
Warning Definition
Overview of the Cisco 3725 Redundant Power Supply Interface Module
Power Requirements for the Cisco 3725 Redundant Power Supply Interface Module
How to Access the Cisco 3725 Router Power Supplies
Safety
Removing the Cisco 3725 Router Power Supply Cable and Network Connections
Remove the DC-Input Power Supply Cable and the Network Interface Cables
Remove the AC-Input Power Cable and the Network Interface Cables
Removing the Cisco 3725 Router Cover
How to Remove the DC-Input Power Supply and On/Off Switch from the Cisco 3725 Router
Removing the Cisco 3725 DC Power Supply
How to Remove the -48 VDC Power Supply, the AC-Input Power Supply, and the On/Off Switch from the Cisco 3725 Router
Removing the Cisco -48VDC Power Supply
Removing the Cisco 3725 AC-Input Power Supply and On/Off Switch Box
Installing the Air Deflector in the Cisco 3725 Router Chassis
How to Install the Redundant Power Supply Interface Module in the Cisco 3725 Router
Installing the Cisco RPS Interface Module in the Cisco 3725 Router Chassis
Connecting the Redundant Power Supply Interface Module Cables to the Cisco 3725 Router
Attaching the Voltage Label to the Cisco 3725 Chassis
Replacing the Cover on the Cisco 3725 Router
How to Reconnect the Cisco 3725 Router
Connecting the Cisco 3725 Router to Building Ground
Reinstalling the Cables and Connecting to the Cisco 600W RPS System Module
Powering On the Router
About Troubleshooting the Redundant Power Supply Interface Module Installation
Related Documentation
Obtaining Documentation
World Wide Web
Documentation CD-ROM
Ordering Documentation
Documentation Feedback
Obtaining Technical Assistance
Cisco.com
Technical Assistance Center
Cisco TAC Web Site
Cisco TAC Escalation Center
Installing the Cisco 3725 Redundant Power Supply Interface Module in the Cisco 3725 Router
Product Number: ACS-3725RPS=
Document Number: 78-14835-01
November, 2002
Purpose
This document provides instructions on removing AC and DC power supplies and installing a redundant power supply (RPS) interface module in a Cisco 3725 router. Use this document in conjunction with the Cisco Redundant Power System Hardware Installation Guide, Cisco 3700 Series Hardware Installation Guide, and the Regulatory Compliance and Safety Information document for your router.
Audience
This document is intended for the power supply installer, who should be familiar with electronic circuitry and wiring practices and have experience as an electronic or electromechanical technician.
Warning 
Only trained and qualified personnel should be allowed to install, replace, or service this equipment. To see translations of the warnings that appear in this publication, refer to the Regulatory Compliance and Safety Information document that accompanied this device.
Scope
The document covers:
•Removing the DC power supply, the AC power supply, or the -48 VDC power supply from the Cisco 3725 router
•Installing a Cisco 3725 redundant power supply (RPS) interface module in the Cisco 3725 router
•Connecting the Cisco RPS interface module to a Cisco 600W RPS system module
If you have questions or need help, refer to the "Related Documentation" section and the "Obtaining Technical Assistance" section.
Content
This document contains the following sections:
•Purpose
•Audience
•Scope
•Content
•Safety Information
•Overview of the Cisco 3725 Redundant Power Supply Interface Module
•Power Requirements for the Cisco 3725 Redundant Power Supply Interface Module
•How to Access the Cisco 3725 Router Power Supplies
•How to Remove the DC-Input Power Supply and On/Off Switch from the Cisco 3725 Router
•How to Remove the -48 VDC Power Supply, the AC-Input Power Supply, and the On/Off Switch from the Cisco 3725 Router
•How to Install the Redundant Power Supply Interface Module in the Cisco 3725 Router
•How to Reconnect the Cisco 3725 Router
•About Troubleshooting the Redundant Power Supply Interface Module Installation
•Related Documentation
•Obtaining Documentation
•Obtaining Technical Assistance
Caution To avoid damaging electrostatic discharge (ESD)-sensitive components, ensure that you have discharged all static electricity from your body before opening the chassis. Before performing procedures described in this document, review the next section, "
Safety Information."
Safety Information
Follow these guidelines to ensure general safety:
•Keep the chassis area clear and dust-free during and after installation.
•Place the removed chassis cover in a safe place.
•Keep tools away from walk areas where you or others could fall over them.
•Do not wear loose clothing that may get caught in the chassis. Fasten your tie or scarf and roll up your sleeves.
•Wear safety glasses when working under conditions that may be hazardous to your eyes.
•Do not perform any action that creates a potential hazard to people or makes the equipment unsafe.
Caution Modifications to this product not authorized by Cisco Systems, Inc. could void the FCC approval and negate your authority to operate the product.
Warning The ISDN connection is regarded as a source of voltage that should be inaccessible to user contact. Do not attempt to tamper with or open any public telephone operator (PTO)-provided equipment or connection hardware. Any hardwired connection (other than by a non-removable, connect-one-time-only plug) must be made only by PTO staff or suitably trained engineers.
Warning The Ethernet 10BASE-T, Token Ring, serial, console, and auxiliary ports contain safety extra-low voltage (SELV) circuits. BRI circuits are treated like telephone-network voltage (TNV) circuits. Avoid connecting SELV circuits to TNV circuits.
Warning Before working on a chassis or working near power supplies, unplug the power cord on AC units; disconnect the power at the circuit breaker on DC units.
Warning Before working on a system that has an on/off switch, turn OFF the power and unplug the power cord.
Warning Ultimate disposal of this product should be handled according to all national laws and regulations.
Working Safely with Electricity
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.
Follow these guidelines when working on equipment powered by electricity:
•Locate the room's emergency power-off switch. Then, if an electrical accident occurs, you can quickly shut the power off.
•Before working on the system, turn off the power and unplug the power cord.
•Disconnect all power before doing the following:
–Working on or near power supplies
–Installing or removing a router chassis or network processor module
–Performing most hardware upgrades
•Do not work alone if potentially hazardous conditions exist.
•Look carefully for possible hazards in your work area, such as moist floors, ungrounded power extension cables, and missing safety grounds.
•Never assume that power is disconnected from a circuit. Always check.
•If an electrical accident occurs, proceed as follows:
–Use caution, and do not become a victim yourself.
–Turn off power to the system.
–If possible, send another person to get medical aid. Otherwise, determine the condition of the victim and then call for help.
–Determine if the person needs rescue breathing or external cardiac compressions; then take appropriate action.
Preventing Electrostatic Discharge Damage
Electrostatic discharge (ESD) can damage equipment and impair electrical circuitry. It occurs when electronic printed-circuit cards are improperly handled and can result in complete or intermittent failures. Always follow ESD prevention procedures when removing and replacing cards. Ensure that the router chassis is electrically connected to earth ground. Wear an ESD-preventive wrist strap, ensuring that it makes good skin contact. Connect the clip to an unpainted surface of the chassis frame to safely channel unwanted ESD voltages to ground. To properly guard against ESD damage and shocks, the wrist strap and cord must operate effectively. If no wrist strap is available, ground yourself by touching the metal part of the chassis.
Caution For safety, periodically check the resistance value of the antistatic strap, which should be between 1 and 10 megohms (Mohms).
Warning Definition
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Warning
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IMPORTANT SAFETY INSTRUCTIONS
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 translated safety warnings that accompanied this device.
Note: SAVE THESE INSTRUCTIONS
Note: This documentation is to be used in conjunction with the specific product installation guide that shipped with the product. Please refer to the Installation Guide, Configuration Guide, or other enclosed additional documentation for further details.
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Waarschuwing
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BELANGRIJKE VEILIGHEIDSINSTRUCTIES
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 de standaard praktijken om ongelukken te voorkomen. Voor een vertaling van de waarschuwingen die in deze publicatie verschijnen, dient u de vertaalde veiligheidswaarschuwingen te raadplegen die bij dit apparaat worden geleverd.
Opmerking BEWAAR DEZE INSTRUCTIES.
Opmerking Deze documentatie dient gebruikt te worden in combinatie met de installatiehandleiding voor het specifieke product die bij het product wordt geleverd. Raadpleeg de installatiehandleiding, configuratiehandleiding of andere verdere ingesloten documentatie voor meer informatie.
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Varoitus
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TÄRKEITÄ TURVALLISUUTEEN LIITTYVIÄ OHJEITA
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 asiakirjassa esitettyjen varoitusten käännökset löydät laitteen mukana toimitetuista ohjeista.
Huomautus SÄILYTÄ NÄMÄ OHJEET
Huomautus Tämä asiakirja on tarkoitettu käytettäväksi yhdessä tuotteen mukana tulleen asennusoppaan kanssa. Katso lisätietoja asennusoppaasta, kokoonpano-oppaasta ja muista mukana toimitetuista asiakirjoista.
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Attention
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IMPORTANTES INFORMATIONS DE SÉCURITÉ
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 les consignes de sécurité traduites qui accompagnent cet appareil.
Remarque CONSERVEZ CES INFORMATIONS
Remarque Cette documentation doit être utilisée avec le guide spécifique d'installation du produit qui accompagne ce dernier. Veuillez vous reporter au Guide d'installation, au Guide de configuration, ou à toute autre documentation jointe pour de plus amples renseignements.
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Warnung
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WICHTIGE SICHERHEITSANWEISUNGEN
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 sind im Lieferumfang des Geräts enthalten.
Hinweis BEWAHREN SIE DIESE SICHERHEITSANWEISUNGEN AUF
Hinweis Dieses Handbuch ist zum Gebrauch in Verbindung mit dem Installationshandbuch für Ihr Gerät bestimmt, das dem Gerät beiliegt. Entnehmen Sie bitte alle weiteren Informationen dem Handbuch (Installations- oder Konfigurationshandbuch o. Ä.) für Ihr spezifisches Gerät.
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Figyelem!
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FONTOS BIZTONSÁGI ELÕÍRÁSOK
Ez a figyelmezetõ jel veszélyre utal. Sérülésveszélyt rejtõ helyzetben van. Mielõtt bármely berendezésen munkát végezte, legyen figyelemmel az elektromos áramkörök okozta kockázatokra, és ismerkedjen meg a szokásos balesetvédelmi eljárásokkal. A kiadványban szereplõ figyelmeztetések fordítása a készülékhez mellékelt biztonsági figyelmeztetések között található.
Megjegyzés ÕRIZZE MEG EZEKET AZ UTASÍTÁSOKAT!
Megjegyzés Ezt a dokumentációt a készülékhez mellékelt üzembe helyezési útmutatóval együtt kell használni. További tudnivalók a mellékelt Üzembe helyezési útmutatóban (Installation Guide), Konfigurációs útmutatóban (Configuration Guide) vagy más dokumentumban találhatók.
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Avvertenza
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IMPORTANTI ISTRUZIONI SULLA SICUREZZA
Questo simbolo di avvertenza indica un pericolo. La situazione potrebbe causare infortuni alle persone. Prima di intervenire su qualsiasi apparecchiatura, occorre essere al corrente dei pericoli relativi ai circuiti elettrici e conoscere le procedure standard per la prevenzione di incidenti. Per le traduzioni delle avvertenze riportate in questo documento, vedere le avvertenze di sicurezza che accompagnano questo dispositivo.
Nota CONSERVARE QUESTE ISTRUZIONI
Nota La presente documentazione va usata congiuntamente alla guida di installazione specifica spedita con il prodotto. Per maggiori informazioni, consultare la Guida all'installazione, la Guida alla configurazione o altra documentazione acclusa.
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Advarsel
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VIKTIGE SIKKERHETSINSTRUKSJONER
Dette varselssymbolet betyr fare. Du befinner deg i en situasjon som kan forårsake personskade. Før du utfører arbeid med utstyret, bør du være oppmerksom på farene som er forbundet med elektriske kretssystemer, og du bør være kjent med vanlig praksis for å unngå ulykker. For å se oversettelser av advarslene i denne publikasjonen, se de oversatte sikkerhetsvarslene som følger med denne enheten.
Merk TA VARE PÅ DISSE INSTRUKSJONENE
Merk Denne dokumentasjonen skal brukes i forbindelse med den spesifikke installasjonsveiledningen som fulgte med produktet. Vennligst se installasjonsveiledningen, konfigureringsveiledningen eller annen vedlagt tilleggsdokumentasjon for detaljer.
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Aviso
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INSTRUÇÕES IMPORTANTES DE SEGURANÇA
Este símbolo de aviso significa perigo. O utilizador encontra-se numa situação que poderá ser causadora de lesões corporais. Antes de iniciar a utilização de qualquer equipamento, tenha em atenção os perigos envolvidos no manuseamento de circuitos eléctricos e familiarize-se com as práticas habituais de prevenção de acidentes. Para ver traduções dos avisos incluídos nesta publicação, consulte os avisos de segurança traduzidos que acompanham este dispositivo.
Nota GUARDE ESTAS INSTRUÇÕES
Nota Esta documentação destina-se a ser utilizada em conjunto com o manual de instalação incluído com o produto específico. Consulte o manual de instalação, o manual de configuração ou outra documentação adicional inclusa, para obter mais informações.
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¡Advertencia!
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INSTRUCCIONES IMPORTANTES DE SEGURIDAD
Este símbolo de aviso indica peligro. Existe riesgo para su integridad física. Antes de manipular cualquier equipo, considere los riesgos de la corriente eléctrica y familiarícese con los procedimientos estándar de prevención de accidentes. Vea las traducciones de las advertencias que acompañan a este dispositivo.
Nota GUARDE ESTAS INSTRUCCIONES
Nota Esta documentación está pensada para ser utilizada con la guía de instalación del producto que lo acompaña. Si necesita más detalles, consulte la Guía de instalación, la Guía de configuración o cualquier documentación adicional adjunta.
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Varning!
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VIKTIGA SÄKERHETSANVISNINGAR
Denna varningssignal 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 vanliga förfaranden för att förebygga olyckor. Se översättningarna av de varningsmeddelanden som finns i denna publikation, och se de översatta säkerhetsvarningarna som medföljer denna anordning.
OBS! SPARA DESSA ANVISNINGAR
OBS! Denna dokumentation ska användas i samband med den specifika produktinstallationshandbok som medföljde produkten. Se installationshandboken, konfigurationshandboken eller annan bifogad ytterligare dokumentation för närmare detaljer.
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Overview of the Cisco 3725 Redundant Power Supply Interface Module
The Cisco 3725 router redundant power supply (RPS) interface module replaces the AC power supply and -48 VDC power supply or the DC power supply installed in the router. The interface module connects to the Cisco 600W Redundant Power System module using a one-to-one or two-to-one cable.
The interface module is used to convert and distribute incoming DC power from the Cisco 600W redundant power system (RPS) module to the DC voltage used by the router. The interface module has four regulated DC outputs:
•+3.3 V
•+5 V
•+12 V
•-12 V
Two cables connect the interface module to the Cisco 3725 router. See Figure 1.
•Cable 1—Standard 24-pin Molex connector (power and RTN connections)
•Cable 2—Standard 4-pin connector (fail and ground connections)
For cable pinout information see "About Troubleshooting the Redundant Power Supply Interface Module Installation" section.
Figure 1 shows the Cisco redundant power supply interface module for the Cisco 3725 router.
Figure 2 shows the location of the interface module in the Cisco 3725 router.
Figure 1 Cisco 3725 Redundant Power Supply Interface Module
Figure 2 Location of the Redundant Power Supply Interface Module in the Cisco 3725 Router
Power Requirements for the Cisco 3725 Redundant Power Supply Interface Module
Table 1 shows the VDC output from the Cisco 3725 router redundant power supply interface module to the motherboard and the output voltage from the Cisco 600W RPS system module to the Cisco 3725 RPS interface module.
Table 1 Output Voltages
Specification
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Requirement
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Output voltage from the interface module to the motherboard
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+3, +5, +12, -12 VDC
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Output voltage from the Cisco 600W RPS to the interface module
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+5, +12, and -12 VDC
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How to Access the Cisco 3725 Router Power Supplies
The power supplies for the Cisco 3725 router are located inside the chassis, To remove the power supplies, complete the following procedures:
•Read the Safety information below.
•Removing the Cisco 3725 Router Power Supply Cable and Network Connections
•Removing the Cisco 3725 Router Cover
Safety
Warning Before working on a chassis or working near power supplies, unplug the power cord on AC units; disconnect the power at the circuit breaker on DC units.
Warning Do not touch the power supply when the power cord is connected. For systems with a power switch, line voltages are present within the power supply even when the power switch is off and the power cord is connected. For systems without a power switch, line voltages are present within the power supply when the power cord is connected.
Warning Do not work on the system or connect or disconnect cables during periods of lightning activity.
Warning Before opening the chassis, disconnect the telephone-network cables to avoid contact with telephone-network voltages.
Warning Network hazardous voltages are present in the BRI cable. If you detach the BRI cable, detach the end away from the router first to avoid possible electric shock. Network hazardous voltages also are present on the system card in the area of the BRI port (RJ-45 connector), regardless of when power is turned off.
Removing the Cisco 3725 Router Power Supply Cable and Network Connections
There are two types of input power switches:
•DC-input on/off switch assembly
•AC-input on/off switch assembly
The following procedures illustrate how to remove the power input cables from the Cisco 3725 router before you remove the cover.
Note Review the safety warnings in the "Safety" section.
Remove the DC-Input Power Supply Cable and the Network Interface Cables
The DC-powered Cisco 3725 router cable is attached to the router by terminal blocks at the rear of the router. Figure 3 shows the on/off switch assembly, DC-input terminals, and building ground connections.
Figure 3 DC On/Off Switch, DC-input Terminals, Chassis Ground Connection
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 breaker on the panel board that 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.
Tools
•ESD-preventive wrist strap
•Phillips screwdriver
To remove the DC-input power cable, do the following:
Step 1 Turn off power to the router (at the on/off switch on the back of the router). See Figure 3.
Step 2 Remove the DC-input cable from the DC-input power source (power supply or other DC power source other than the router).
Step 3 Remove all network interface cables from the rear panel of the router.
Caution Do not attempt to remove the cable from the terminal blocks until you verify that the external power source is unplugged and no longer supplying power to the chassis.
Step 4 Remove the plastic covers from the terminal block.
Step 5 Loosen the terminal block screws.
Step 6 Remove the power cable lugs from the screws.
Step 7 Set the DC-input cable aside.
Step 8 Place the plastic cover back on the terminal blocks.
Step 9 Disconnect the chassis ground connection. See Figure 3.
Remove the AC-Input Power Cable and the Network Interface Cables
Tools
•ESD-preventive wrist strap
To remove the AC-input power cable, do the following:
Step 1 Turn off power to the router (at the on/off switch on the back of the router).
Figure 4 shows the AC-input on/off switch on the Cisco 3725 router.
Figure 4 AC-Input, On/Off Switch, and Chassis Ground Connection
Step 2 Unplug the AC-input cable from the power source.
Step 3 Remove all network interface cables from the rear panel.
Step 4 Remove the AC-input cable from the Cisco 3725 router and set it aside.
Step 5 Disconnect the chassis ground connection.
Removing the Cisco 3725 Router Cover
Tools
•ESD-preventive wrist strap
•Number 2 Phillips screwdriver
To remove the router cover, do the following:
Step 1 Verify that all power to the router is turned off and that the power input cables are unplugged. Refer to the "Removing the Cisco 3725 Router Power Supply Cable and Network Connections" section.
Step 2 Place the router so that the rear panel is closest to you.
Step 3 Remove the six screws located on top of the cover and set the screws aside in a safe place. See Figure 6.
Step 4 If your router has a blank coverplate in the upper right network module slot, loosen the captive screw at the left edge of the blank cover.
Note This screw is identified by the following stamped lettering: LOOSEN SCREW TO REMOVE COVER.
Figure 5 Location of Captive Screw
Step 5 Lift the edge of the cover. See number 1 in Figure 6.
Step 6 Slide the cover toward the right until the metal tabs on the rear edge separate from the chassis bottom. (See number 2 in Figure 6.)
Step 7 Lift the cover completely off and set it aside.
Figure 6 Removing the Top Cover of the Cisco 3725 Router
How to Remove the DC-Input Power Supply and On/Off Switch from the Cisco 3725 Router
The power supplies and on/off switch are located inside the Cisco 3725 router. Before removing the DC-power supply and switch, complete the following procedures.
•Remove the DC-Input Power Supply Cable and the Network Interface Cables
•Removing the Cisco 3725 Router Cover
Figure 7 Location of the DC Power Supply and On/Off Switch in the Cisco 3725 Router
Warning Before working on a chassis or working near power supplies, unplug the power cord on AC units; disconnect the power at the circuit breaker on DC units.
Warning Do not touch the power supply when the power cord is connected. For systems with a power switch, line voltages are present within the power supply even when the power switch is off and the power cord is connected. For systems without a power switch, line voltages are present within the power supply when the power cord is connected.
Warning Do not work on the system or connect or disconnect cables during periods of lightning activity.
Warning Network hazardous voltages are present in the BRI cable. If you detach the BRI cable, detach the end away from the router first to avoid possible electric shock. Network hazardous voltages also are present on the system card in the area of the BRI port (RJ-45 connector), regardless of when power is turned off.
Removing the Cisco 3725 DC Power Supply
After you remove the cover from the chassis, follow this procedure to remove the DC power supply and on/off switch.
Tools
•ESD-preventive wrist strap
•Number 2 Phillips screwdriver
Step 1 Verify that all power connections to the Cisco router are disconnected. See the "Remove the DC-Input Power Supply Cable and the Network Interface Cables" section.
Step 2 Find the large and small power connectors on the motherboard and disconnect them.
Figure 8 Removing the Power Connections
Step 3 Remove the screws from the DC-input power supply on/off switch. See Figure 9.
Figure 9 Removing the DC On/Off Switch
Step 4 The Cisco 3725 DC input power supply is held in place by a bracket and screw at the front left side of the router. Remove the screw from the bracket and set it aside. See Figure 10.
Figure 10 Removing the Screw from the Bracket
Step 5 Remove the cable from the cable bracket.
Step 6 Lift the on/off switch, at an angle, up and out of the box. See Figure 11.
Figure 11 Removing the On/Off Switch Box from the Chassis
Step 7 Slide the power supply back away from the bracket on the chassis. This disengages the latch in the chassis that secures the power supply in place. See Figure 12.
Figure 12 Disengaging the DC-input Power Supply
Step 8 To disengage the power supply from the bracket, move the power supply toward the left side of the chassis.
Step 9 Lift the power supply and on/off switch box out of the chassis. See Figure 13.
Note The power supply weighs 3.5 lbs (1.59 kg).
Figure 13 Removing the Cisco 3725 DC Input Power Supply from the Chassis
How to Remove the -48 VDC Power Supply, the AC-Input Power Supply, and the On/Off Switch from the Cisco 3725 Router
Some Cisco 3725 routers have both the -48 VDC power supply and an AC-input power supply with an on/off switch. See Figure 14, some Cisco 3725 routers use only the AC-input power supply.
•If you have both the -48 VDC power supply and the AC-input power supply, complete the two procedures listed below and then go to "Removing the Cisco -48VDC Power Supply" section.
•If you do not have a -48 VDC power supply in your chassis, complete the two procedures listed below and then go to "Removing the Cisco 3725 AC-Input Power Supply and On/Off Switch Box" section.
Before removing the power supplies and switch, complete the following procedures:
•Remove the AC-Input Power Cable and the Network Interface Cables
•Removing the Cisco 3725 Router Cover
Figure 14 Location of the Power Supplies and On/Off Switch Box in the Cisco 3725 Router
Removing the Cisco -48VDC Power Supply
The following procedure describes how to remove the Cisco -48 VDC power supply from the Cisco 3725 router.
Note The -48 VDC power supply must be removed before you can remove the AC-input power supply.
After you remove the cover from the chassis, follow this procedure to remove the -48 VDC power supply.
Tools
•ESD-preventive wrist strap
•Number 2 Phillips screwdriver
•Small flat-blade screwdriver
Step 1 Verify that all power connections to the Cisco router are disconnected. See the "Remove the AC-Input Power Cable and the Network Interface Cables" section.
Step 2 Remove the -48 VDC power supply spacer plate and set it aside. See Figure 15.
Figure 15 Removing the Cisco 3725 -48 VDC Power Supply Spacer Plate
Figure 16 Front and Rear Views of the Cisco -48 VDC Power Supply
Step 3 The Cisco 3725 -48 VDC power supply is held in the chassis by one mounting screw at the front of the power supply. Remove the mounting screw. See Figure 17.
Figure 17 Removing the Mounting Screw
Step 4 Slide the -48 VDC power supply away from the AC-input power supply until the until the guide posts on the -48 VDC power supply are free of the AC-input power supply. See Figure 18.
Figure 18 Removing the Cisco -48 VDC Power Supply from the Cisco 3725 Router
Step 5 Lift the -48 VDC power supply out of the chassis and set it aside.
Note The power supply weighs 3 lbs (1.36 kg)
Step 6 Turn the spacer plate over so that the bracket is on the top.
Figure 19 Reinstalling the Spacer Plate in the Cisco 3725 Chassis
Step 7 Replace the spacer plate in the chassis, making sure that it rests against the side of the chassis and covers the ventilation holes.
Removing the Cisco 3725 AC-Input Power Supply and On/Off Switch Box
After you remove the -48 VDC power supply from the chassis, follow this procedure to remove the AC-input power supply and on/off switch.
Tools
•ESD-preventive wrist strap
•Number 2 Phillips screwdriver
Figure 20 Cisco AC-Input Power Supply and On/Off Switch
Step 1 Verify that all power connections to the Cisco router are disconnected. See the "Remove the AC-Input Power Cable and the Network Interface Cables" section.
Step 2 Find the large connector and small power connectors on the motherboard.
Step 3 Disconnect the power cables. See Figure 21.
Figure 21 Disconnecting the Cisco 3725 Power Connectors
Step 4 The Cisco 3725 power supply on/off switch is held in the chassis by two screws at the rear of the router. (See Figure 22.) Remove the screws and set them aside.
Figure 22 Removing the AC-Input Power Supply Mounting Screws
Step 5 The Cisco 3725 AC-input power supply is held in the chassis by one screw at the front of the chassis. (See Figure 23.) Remove the screw and set it aside.
Figure 23 Removing the AC-Input Power Supply Connector Mounting Screw
Step 6 Lift the power supply on/off switch, at an angle, up and out of the chassis and set it beside the chassis. (See Figure 24.)
Figure 24 Removing the Cisco 3725 Power Supply On/Off Switch
Step 7 Slide the power supply toward the left side of the chassis to disengage the tab on the bracket that secures the power supply in place. See Figure 25.
Caution Do not attempt to remove the AC-input power supply and on/off switch without first removing the -48 VDC power supply, if that power supply is installed.
Figure 25 Disengaging the AC-Input Power Supply
Step 8 Lift the power supply out of the chassis. See Figure 26.
Figure 26 Removing the AC-input Power Supply and On/Off Switch
Caution The power supply weighs 3 lbs (1.36 kg)
Installing the Air Deflector in the Cisco 3725 Router Chassis
After the power supplies are removed (DC or AC and -48 VDC) from the chassis, an air deflector must be installed to direct the airflow in the Cisco 3725 chassis.
Tools Required
•ESD-preventive wrist strap
•Number 2 Phillips screwdriver
•1 #2 Phillips head screw
Step 1 Place the air deflector so that the slot in the deflector fits over the tab on the support bracket. See Figure 27.
Figure 27 Air Deflector and Support Bracket
Step 2 Slide the air deflector backwards until the screw hole in the air deflector aligns with the screw hole in the holding bracket on the chassis. The tab on the bracket slides into the slot hole in the air deflector and secures the air deflector in place.
Step 3 Insert the screw and, using the Phillips head screwdriver, tighten to 8 to 10 in-lbs (133 to 166 N-m).
How to Install the Redundant Power Supply Interface Module in the Cisco 3725 Router
The interface module fits in the same slot as the on/off switch that was just removed from the chassis. Before installing the interface module, complete the following procedures:
•Removing the Cisco 3725 Router Power Supply Cable and Network Connections
•Removing the Cisco 3725 Router Cover
•Removing the Cisco 3725 DC Power Supply
•Removing the Cisco -48VDC Power Supply
•Removing the Cisco 3725 AC-Input Power Supply and On/Off Switch Box
•Installing the Air Deflector in the Cisco 3725 Router Chassis
Installing the Cisco RPS Interface Module in the Cisco 3725 Router Chassis
Tools
•ESD-preventive wrist strap
•Number 2 Phillips screwdriver
•2—6x32 - 0.25 Phillips head screws
Step 1 Slide the interface module into the slot so that the on/off switch and plug face the cutout in the chassis rear panel.
Step 2 Align the screw holes in the module with the screw holes in the chassis.
Step 3 While holding the interface module in place, insert screws in the two holes on either side of the rear-panel cutout.
Figure 28 Cisco Redundant Power Supply Interface Module Installation
Step 4 Tighten the screws to 8 to 10 in-lbs (133 to 166 N-m).
Connecting the Redundant Power Supply Interface Module Cables to the Cisco 3725 Router
The two cables coming from the back of the interface module are attached to connectors on the back of the motherboard in the Cisco 3725 router chassis.
Step 1 Connect the large cable to the large connector on the back of the motherboard.
Step 2 Connect the small cable to the small connector on the back of the motherboard.
Figure 29 Cabling the Interface Module
Attaching the Voltage Label to the Cisco 3725 Chassis
The Cisco 3725 redundant power supply interface module kit comes with a self-adhesive label that must be placed on the rear of the chassis after the interface module is installed. This label shows the available voltages and maximum wattage when the interface module is installed in the chassis. See Figure 30 for label location.
Figure 30 Attaching the Voltage Label to the Cisco 3725 Chassis
Replacing the Cover on the Cisco 3725 Router
After you finish installing the Cisco redundant power supply interface module, follow these steps to replace the cover:
Step 1 Place the chassis bottom so that the front panel is closest to you.
Step 2 Hold the cover so that the tabs at the rear of the cover are aligned with the chassis bottom.
Step 3 Push the cover toward the rear, making sure that the cover tabs fit under the chassis rear-panel and the rear-panel tabs fit under the cover.
Step 4 Slide the cover slightly to the left to lock the cover into position (number 1 in Figure 31).
Step 5 Lower the front of the cover onto the chassis (number 2 in Figure 31).
Step 6 Fasten the cover with the five screws you set aside earlier.
Step 7 If your router has a blank coverplate in the upper right network-module slot, tighten the captive screw at the left edge of the blank cover.
Note This screw is identified by the following stamped lettering: LOOSEN SCREW TO REMOVE COVER.
Figure 31 Replacing the Cisco 3725 Router Cover
How to Reconnect the Cisco 3725 Router
After the router cover has been installed, return the Cisco 3725 router to the telco rack or installation location.
With the Cisco redundant power supply interface module installed, the router must be connected to the Cisco 600W RPS system module. For installation information about the Cisco 600W RPS system module, go to the following URL:
http://www.cisco.com/univercd/cc/td/doc/product/access/acs_mod/cis3600/hw_inst/ps_inst/rps_docs/
index.htm
Caution Do not connect the network interface cables or power cord, or turn on power to the router, until you have connected the chassis to the building ground.
Warning This unit is intended for installation in restricted access areas. A restricted access area is where access can only be gained by service personnel through the use of a special tool, lock and key, or other means of security, and is controlled by the authority responsible for the location.
Connecting the Cisco 3725 Router to Building Ground
To connect the building ground wire to the Cisco 3725 router, follow these steps:
Note The installation must comply with all applicable national and local codes.
Warning Use copper conductors only. To see translations of the warnings that appear in this publication, refer to the Regulatory Compliance and Safety Information document that accompanied this device.
Step 1 Crimp a size AWG 6 (minimum 13 mm2) ground wire in the new equipment building system (NEBS) ground lug.
Step 2 Attach the ground lug to the Cisco 3725 chassis, using the supplied screws as shown in Figure 32.
Figure 32 NEBS-Compliant Ground Connection on the Cisco 3725 Router
Step 3 Connect the other end of the ground wire to a suitable grounding point at your site.
Reinstalling the Cables and Connecting to the Cisco 600W RPS System Module
To complete the installation, do the following:
Step 1 Reinstall the network interface cables.
Step 2 Connect the Cisco 600W RPS system module cable into the power connection at the back of the Cisco 3725 router.
Step 3 Tighten the plug in place using the two screw-downs on either side of the plug.
Figure 33 Connecting the Cisco 3725 to the Cisco 600W RPS Module
Step 4 Connect the other end of the power supply cable to the connector at the rear of the Cisco 600W RPS module.
Note The power supply cable can be a one-to-one cable or a two-to-one cable.
For information about the Cisco 600W redundant power supply system, refer to the Cisco Redundant Power Supply System Hardware Installation Guide at the following URL:
http://www.cisco.com/univercd/cc/td/doc/product/access/rpsbk/rpshim/index.htm
Powering On the Router
Warning The plug-socket combination must be accessible at all times because it serves as the main disconnecting device.
Caution To ensure adequate cooling, never operate the router unless the unit is completely closed.
Warning This product relies on the building's installation or power supply for short circuit (over current) protection. Ensure that a Listed and Certified fuse or circuit breaker no larger than 60 VDC, 15A is used on all current-carrying conductors.
To power on the router, perform the following steps:
Step 1 Power on the router.
Step 2 Verify that he LED labeled SYSTEM on the front panel is on.
If you encounter problems when you power on the router, see the "About Troubleshooting the Redundant Power Supply Interface Module Installation" section that follows.
About Troubleshooting the Redundant Power Supply Interface Module Installation
Check the following items to help isolate problems with the Cisco 3725 redundant power supply interface module installation:
•With the power switch on, is the power LED on the front panel on?
–If not, check the AC input, AC source, router circuit breaker, and power supply cable.
–Check the interface module connection to the motherboard.
–If the power LED is still off, the problem might be a redundant power supply failure.
•Does the router shut down after being on a short time?
–Check the fans. If the fans are not working, the router overheats and shuts itself down.
–If the fans are not working, check the power supply connections to the fans.
–Ensure that the chassis intake and exhaust vents are clear.
–Check the environmental site requirements in your router installation and configuration guide.
•Check the interface module output voltages and Cisco 600W RPS output voltages.
Table 2 lists the VDC output from the Cisco 3725 router redundant power supply interface module to the motherboard.
Table 2 Cisco 3725 Redundant Power Supply Interface Module Output Voltage
Output Voltage
|
+3.3 VDC
|
+5 VDC
|
+12 VDC
|
-12 VDC
|
Maximum
|
3.45
|
5.25
|
12.55
|
-12.6
|
Nominal
|
3.35
|
5.10
|
12.20
|
-12.0
|
Minimum
|
3.25
|
4.95
|
11.90
|
-11.5
|
Peak to Peak, mV
|
30
|
50
|
120
|
120
|
Table 3 shows the output voltage from the Cisco RPS600 power supply module to the Cisco 3725 redundant power supply interface module.
Table 3 Cisco RPS600 Redundant Power Supply Output Voltage
Specification
|
Requirement
|
Cisco 600W RPS system module output to the Cisco 3725 redundant power supply interface module
|
+5, +12, and -12 VDC
|
Table 4 and Table 5 list the cable pinout assignments for the cables from the interface module to the Cisco 3725 motherboard.
Table 4 AC Interface Module Cable Pin Assignments (Output)
Pin Number
|
Assignment
|
Pin Number
|
Assignment
|
1
|
+3.3 V sense
|
13
|
+5 V
|
2
|
Sense RTN
|
14
|
+5 V
|
3
|
No connection
|
15
|
RTN
|
4
|
RTN
|
16
|
RTN
|
5
|
-12 V
|
17
|
RTN
|
6
|
RTN
|
18
|
+3.3 V
|
7
|
+12 V
|
19
|
+3.3 V
|
8
|
+12 V
|
20
|
+3.3 V
|
9
|
RTN
|
21
|
RTN
|
10
|
+5 V
|
22
|
RTN
|
11
|
+5 V
|
23
|
No connection
|
12
|
+5 V
|
24
|
No connection
|
Table 5 AC Interface Module Cable Pin Assignments (RPS Signals)
Pin Number
|
Assignment
|
Pin Number
|
Assignment
|
1
|
GND
|
3
|
FAIL_0
|
2
|
RPS_FAIL
|
4
|
FAIL_1
|
Related Documentation
Check the following websites for more information about the Cisco 3725 router.
Cisco 3725 Router Quick Start Guide at the following URL:
http://www.cisco.com/univercd/cc/td/doc/product/access/acs_mod/cis3700/37xx_qsg/3725qsg.htm
Interface card installation at the following URL:
http://www.cisco.com/univercd/cc/td/doc/product/access/acs_mod/cis2600/hw_inst/wic_inst/wic_qsg.htm
Hardware installation documents for Cisco 3700 series routers at the following URL:
http://www.cisco.com/univercd/cc/td/doc/product/access/acs_mod/cis3700/hw_inst/index.htm
Cisco 600W Redundant Power Supply (RPS) Documents at the following URL:
http://www.cisco.com/univercd/cc/td/doc/product/access/acs_mod/cis2600/hw_inst/ps_inst/rps_docs/index.htm
Software configuration documents for Cisco 3700 series routers at the following URL:
http://www.cisco.com/univercd/cc/td/doc/product/access/acs_mod/cis3700/sw_conf/index.htm
Cisco IOS release notes at the following URL:
http://www.cisco.com/univercd/cc/td/doc/product/access/acs_mod/cis3700/rn3700/index.htm
Regulatory compliance and safety documents for Cisco 2600 series routers at the following URL:
http://www.cisco.com/univercd/cc/td/doc/product/access/acs_mod/cis3700/rcsi/index.htm
For more information about the Cisco 3725 router, refer to the following URL:
http://www.cisco.com/pcgi-bin/Support/PSP/psp_view.pl?p=Hardware:3700
Obtaining Documentation
These sections explain how to obtain documentation from Cisco Systems.
World Wide Web
You can access the most current Cisco documentation on the World Wide Web at this URL:
http://www.cisco.com
Translated documentation is available at this URL:
http://www.cisco.com/public/countries_languages.shtml
Documentation CD-ROM
Cisco documentation and additional literature are available in a Cisco Documentation CD-ROM package, which is shipped with your product. The Documentation CD-ROM is updated monthly and may be more current than printed documentation. The CD-ROM package is available as a single unit or through an annual subscription.
Ordering Documentation
You can order Cisco documentation in these ways:
•Registered Cisco.com users (Cisco direct customers) can order Cisco product documentation from the Networking Products MarketPlace:
http://www.cisco.com/cgi-bin/order/order_root.pl
•Registered Cisco.com users can order the Documentation CD-ROM through the online Subscription Store:
http://www.cisco.com/go/subscription
•Nonregistered Cisco.com users can order documentation through a local account representative by calling Cisco Systems Corporate Headquarters (California, U.S.A.) at 408 526-7208 or, elsewhere in North America, by calling 800 553-NETS (6387).
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