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Product Number: PWR-GSR12-DC=
This document contains instructions for installing or replacing a DC-input power supply in the Cisco 12012 Gigabit Switch Router (GSR). The Cisco 12012 is a member of the Cisco 12000 series of Internet routing products. The Cisco 12012 is aimed at scaling the Internet and enterprise backbones to speeds of OC-3/STM-1 (155 Mbps), OC-12/STM-4 (622 Mbps), and OC-48/STM-16 (2.4 Gbps). The Cisco 12012 is built around a high-speed switching fabric that is scalable from 5 to 60 Gbps, providing high-performance to support Internet Protocol (IP) -based local-area networks (LANs) and wide-area networks (WANs).
The sections of this document include the following:
The Cisco 12012 has two card cages; the upper card cage and the lower card cage. (Refer to Figure 1.) The upper card cage has 12 user-configurable slots available for line cards and a Gigabit Route Processor (GRP). One additional slot (rightmost slot) in the upper card cage is non-configurable; it is reserved for an alarm card. The line cards and the GRP are not slot dependent; you can install the line cards and the GRP in any of the first 12 available slots.
The lower card cage, located behind the air filter, has five horizontal slots for switch fabric cards.
The Cisco 12012 supports up to two DC-input power supplies in a power supply bay located below the lower card cage. (Refer to Figure 1.) The power supply bay is divided into four positions designated A1, A2, B1, and B2 (from left to right). Cisco 12012 systems come standard with one DC-input power supply installed in power supply bay positions A1 and A2. Power supply bay positions B1 and B2 have power supply blanks installed to maintain airflow and for EMI considerations. You can install a second DC-input power supply in power supply bay positions B1 and B2 for power supply redundancy and current sharing.
 | Caution Do not mix DC-input and AC-input power supplies in the same Cisco 12012. This configuration is not supported and can cause system damage. |
In systems with redundant power (two DC-input power supplies), you can install, remove, or replace one of the power supplies without affecting system operation. When power is removed from one power supply, the redundant power supply maintains uninterrupted system operation.
The DC-input power supply is a modular unit measuring 7.8-inches (20-cm) wide by 10-inches (25.4-cm) wide by 15-inches (38-cm) deep and weighing 19 lb (8.6 kg). (Refer to Figure 2.) The power supply slides in and out of the power supply bay and is secured in place by a combination of a single captive jackscrew on the power supply faceplate and a latch, which is part of the power on/off switch also located on the power supply faceplate.
Electrical and control line connections between the power supply and the Cisco 12012 backplane are made through a connector located at the back of the power supply. A three-lead terminal block mounted on the power supply faceplate provides connection points for an external circuit breaker alarm circuit. The source DC power cable attaches to the power supply through three pairs of threaded terminals (negative (-), positive (+), and ground) located on the power supply faceplate.
Table 1 lists the DC-input power supply power specifications.
| Specification | Nominal Value | Acceptable Value Ranges |
|---|---|---|
| DC input voltage | -48/-60 VDC1 | -40.5 to -56 VDC (United States)
-58 to -75 VDC (International) |
| Source DC service requirement | 60amp (A) | - |
| DC output voltages | +5.2 and -48 VDC | +5.35 to +5.0 VDC -75 to -40.5 VDC |
The source DC power cable leads and lugs from the source DC service circuit breaker to the power supply must meet the following requirements:
The faceplate of the DC-input power supply has two LEDs: a green input OK LED and a red output fail LED. (Refer to Figure 4.)
The LEDs indicate the following:
Before you begin the replacement procedure, review the safety guidelines in this section to avoid injuring yourself or damaging the equipment. This section also repeats in multiple languages the warnings in this document.
In addition, review the safety warnings listed in the document Regulatory Compliance and Safety Information for the Cisco 12012 Gigabit Switch Router (Document Number 78-4347-xx) that accompanied your Cisco 12012 before installing, configuring, or maintaining the router.
Following are translations for the warning statements used in this document:
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.
The following guidelines will help ensure your safety and protect the equipment. This list is not inclusive of all potentially hazardous situations, so be alert.
The line cards, Gigabit Route Processor (GRP), switch fabric cards, blower modules, and redundant power supplies are designed to be removed and replaced while the system is operating without presenting an electrical hazard or damage to the system.
Follow these basic guidelines when working with any electrical equipment:
In addition, use the guidelines that follow when working with any equipment that is disconnected from a power source, but still connected to telephone or network wiring:
Electrostatic discharge (ESD) damage, which can occur when electronic boards or components are handled improperly, can result in intermittent or complete failures.
Following are guidelines for preventing ESD damage:
| Caution For safety, periodically check the resistance value of the antistatic strap. The measurement should be between 1 and 10 megohms. |
You need the following tools and parts to install or replace a DC-input power supply:
The Cisco 12012 supports up to two DC-input power supplies. In systems with dual power supplies, if one power supply fails, the remaining power supply maintains uninterrupted operation of the router while you replace the defective supply.
| Caution 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. |
Perform the following steps to remove a DC-input power supply:
Step 1 Attach an antistatic wrist strap to yourself and to one of the two ESD connection sockets located on the front edges of the upper card cage or to bare metal on the frame.
Step 2 If you have not already done so, turn OFF (O) the power switch on the DC-input power supply.
| Warning Voltages might be present on the DC-input power supply terminals. Turn off the power source circuit breaker and remove the power supply before accessing the terminals. |
Step 3 Locate and turn off the source DC circuit breaker that services the power supply you want to remove. As an added precaution, tape the circuit breaker handle in the off position.
Step 4 Using a flat-blade screwdriver or a 10-mm nutdriver, turn the captive jackscrew counterclockwise (eject) to unseat the power supply from the backplane power connector. Continue turning the jackscrew to disengage the jackscrew from the power supply bay.
Step 5 Grasp the power supply handle and slide the power supply halfway out of the bay. (Refer to Figure 5.)
| Caution The DC-input power supply weighs 19 lb (8.3 kg). Use two hands when handling the power supply. |
Step 6 Place your free hand underneath the power supply for support and slide the power supply completely out of the bay. Place the power supply face up on the floor in front of you.
Step 7 Loosen the two screws securing the DC-input power supply front cover in place. Lift up slightly, then pull the front cover away from the power supply faceplate. Set the front cover aside. (Refer to Figure 6.)
Step 8 Remove the two screws that secure the power cable bracket to the power supply faceplate and remove the cable bracket. (Refer to Figure 7.) Set the bracket and screws aside.
| Caution Before proceeding to the next step, verify that the source DC circuit breaker servicing the DC power supply you are removing is in the OFF position. Also verify that the power switch on the DC-input power supply is OFF (O). As an additional check, measure the voltages across the leads attached to the power supply you have removed. All readings should be zero volts. |
Step 9 Remove the outer nut and washer from each terminal and disconnect the source DC power cable leads from the power supply lugs in the following order: negative (-), positive (+), and ground. (Refer to Figure 8.)
Step 10 Pull the DC power cable leads down through the power supply handle and set the power cable aside.
| Caution As an added precaution, we strongly recommend that you place tape over the exposed metal terminals on the power cable to prevent accidental contact between the leads or the leads and ground. |
Step 11 If leads are attached to the power supply circuit breaker external alarm terminal block, record on a piece of paper which terminals the leads are attached to for later connection.
Step 12 Disconnect the leads attached to the circuit breaker alarm terminal block. (Some sites might not have an external alarm system for the power supply circuit breaker.)
If you plan to return the old power supply to the factory, repackage it in the shipping container you received with the replacement power supply.
This procedure provides the steps necessary to replace a defective DC-input power supply or install a second DC-input power supply. If you are upgrading your Cisco 12012 with a second DC-input power supply for power supply redundancy, you must meet the following site power and source DC power cable requirements prior to installing the second supply:
If you are upgrading your Cisco 12012 with a second DC-input power supply, you must remove the two power supply blanks covering the empty power supply bays before installing the power supply.
Perform the following steps to install a new or replacement DC-input power supply:
| Caution The DC-input power supply weighs 19 lb (8.3 kg). Use two hands when handling the power supply. |
Step 1 Attach an antistatic wrist strap to yourself and to one of the two ESD connection sockets located on the front edges of the upper card cage or to bare metal on the frame.
Step 2 Remove the replacement DC-input power supply from its shipping container.
Step 3 Verify that the power switch on the replacement power supply is in the OFF (O) position.
Step 4 Loosen the two screws that secure the DC-input power supply front cover in place. Lift up slightly, then pull the front cover away from the power supply faceplate. Set the front cover aside. (Refer to Figure 6.)
Step 5 Remove the two screws that secure the source DC power cable bracket to the power supply faceplate and remove the bracket.
| Caution Before proceeding to the next step, verify that the source DC circuit breaker servicing the DC power supply you are removing is in the OFF position. Also verify that the power switch on the DC-input power supply is OFF (O). As an additional check, measure the voltages across the DC power cable leads you intend to attach to the power supply. All readings should be zero volts. |
Step 6 Thread the source DC power cable leads up underneath the power supply handle. Allow sufficient slack in the power cable for strain relief.
| Warning When installing the unit, the ground connection must always be made first and disconnected last. |
Step 7 Remove the outer nut and locking washer from each power supply terminal and attach the source DC power cable lugs to the power supply terminals in the following order: ground to ground, positive to positive (+), and negative to negative (-).
Step 8 If your site is equipped with an external power supply circuit breaker alarm, thread the power supply circuit breaker external alarm leads up through the power supply handle and attach them to the circuit breaker alarm terminal block on the power supply faceplate according to the notes you made in a previous step. (Some sites might not be equipped with a power supply circuit breaker external alarm.)
Step 9 Position the source DC power cable leads underneath the power supply handle on the power supply faceplate in the following order from left to right: negative (-), positive (+), and ground. Place the DC power cable bracket over the power cable leads and secure the cable leads and the cable bracket to the power supply faceplate with the two screws that you removed earlier.
Step 10 Verify that the source DC wiring from the source DC breaker to the power supply is correct and that the terminal connections on the power supply are correct and tight.
Step 11 Place the power supply front cover so that the keyholes are positioned over the two standoff screws on the power supply faceplate. Slide the cover down slightly to engage the two screws and secure it in place by tightening the two screws.
Step 12 If you are upgrading your Cisco 12012 with a second DC-input power supply, you must remove the two power supply blanks covering the empty power supply bay slots before installing the power supply. To remove a power supply blank:
(a) Loosen the captive screw on the power supply blank faceplate that secures the power supply blank to the card cage assembly.
(b) Slide the power supply blank out the front of the power supply bay.
(c) Repeat steps (a) and (b) to remove the second power supply blank. Retain the two power supply blanks for possible future use.
| Caution To prevent damaging the backplane power connector, do not use excessive force when sliding the power supply into the bay slot. |
Step 13 Using two hands to support and guide the power supply, carefully slide it into the vacant bay. Stop when the power supply captive jackscrew makes contact with the front of the power supply bay.
Step 14 Keep one hand on the power supply handle and apply even pressure to the power supply as you turn the captive jackscrew clockwise (insert) using a 10-mm nutdriver or flat-blade screwdriver. Do not overtighten the jackscrew.
Step 15 Turn on the source DC circuit breaker servicing the DC-input power supply.
This completes the DC-input power supply replacement procedure.
Proceed to the following section, "Checking the Installation," to verify the installation.
To complete the installation, turn ON (|) the power supply and observe the LEDs on the faceplate to verify that the power supply is operating properly. Then perform the following steps to check the installation:
Step 1 Check the following components to make sure they are secure:
Step 2 Verify that the Cisco 12012 powers up correctly. Visually check that the power supply input OK LED goes on and stays on.
Step 3 Visually check that the power supply output fail LED flashes on and off for five seconds, then goes off.
If the power supply fails to operate properly after several attempts to power it up, contact a service representative for assistance.
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio-frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference, in which case users will be required to correct the interference at their own expense.
You can determine whether your equipment is causing interference by turning it off. If the interference stops, it was probably caused by the Cisco equipment or one of its peripheral devices. If the equipment causes interference to radio or television reception, try to correct the interference by using one or more of the following measures:
Modifications to this product not authorized by Cisco Systems, Inc. could void the FCC approval and negate your authority to operate the product.
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