Juniper MX240 Instruction For Upgrading

3D Universal Edge Router Fan Trays and Power Supplies December 2010 Part Number: 530-036423 Revision 02 This document describes the necessary steps to be taken to upgrade any Juniper Networks MX Series 3D Universal Edge Router chassis to higher capacity cooling and higher capacity power. Step-by-step descriptions are given for replacement of the various parts in the chassis. All of these upgrades can be performed while the system is operational, but it is important to follow the complete process through. NOTE: Combinations of regular-capacity and high-capacity supplies and fan trays are not supported outside of the upgrade window. CAUTION: The router cannot be powered from AC and DC power supplies simultaneously. The first type of power supply detected by the router when initially powered on determines the type of power supply allowed by the router. All installed power supplies of the other type are disabled by the router. If you install a power supply of the other type while the router is operating, the router disables the power supply and generates an alarm. NOTE: Before upgrading, the MX Series router must be running Junos OS Release 10.0 R1 or later to support high-capacity fan trays. Junos OS Release 10.0R2isrequiredtosupporttheMX240andMX480ACandDChighcapacity power supplies, and the MX960 AC high- capacity power supplies. Junos OS Release 10.2 R1 is required to support the MX960 DC high-capacity power supplies. 1 Copyright © 2010, Juniper Networks, Inc.

capacity power supplies that may be installed in your MX Series router. The upgrade kit contains the following items; they are also available as spares: • Up to four power supplies • Up to two fan trays • Optional one filter tray (MX960) • Rating label In this guide, three areas are addressed, and all three have to be completed before your MX Series router is fully enabled for higher capacity power and cooling. • Cooling • Power • Rating label change Higher capacity cooling is required for some types of DPCs or MPCs, and higher capacity power is required for a higher number of newer MPCs. Note that there are minimum software revision requirements for the cooling and power modules. Without this minimum software revision, these new parts are not supported and likely not detected and managed properly. NOTE: Before upgrading, the MX Series router must be running Junos OS Release 10.0 R1 or later to support high-capacity fan trays. Junos OS Release 10.0R2isrequiredtosupporttheMX240andMX480ACandDChighcapacity power supplies, and the MX960 AC high- capacity power supplies. Junos OS Release 10.2 R1 is required to support the MX960 DC high-capacity power supplies. Contents Fan Tray Upgrade Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Replacing the MX240 Fan Tray . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Replacing the MX480 Fan Tray . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Replacing the MX960 Fan Trays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Upgrading the MX960 Air Filter Tray . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Removing the MX960 Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Installing the MX960 High-Capacity Tray and Filter . . . . . . . . . . . . . . . . . . . . . . . . 12 Fan Tray Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Power Supply Zone Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Upgrading the MX240 and MX480 AC Power Supplies . . . . . . . . . . . . . . . . . . . . . 14 Removing the MX240 and MX480 AC Power Supplies . . . . . . . . . . . . . . . . . . . . . 14 Installing the MX240 and MX480 AC High-Capacity Power Supplies . . . . . . . . . . 15 Upgrading the MX240 and MX480 DC Power Supplies . . . . . . . . . . . . . . . . . . . . . 16 Removing the MX240 and MX480 DC Power Supplies . . . . . . . . . . . . . . . . . . . . . 16 Setting the MX240 and MX480 DC High-Capacity Power Supply Input Mode Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Copyright © 2010, Juniper Networks, Inc. 2 Upgrading MX240, MX480, and MX960 3D Universal Edge Router Power Supplies and Fan Trays

Upgrading the MX960 AC Power Supplies Overview . . . . . . . . . . . . . . . . . . . . . . . 22 Removing the MX960 AC Power Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Installing the MX960 AC High-Capacity Power Supplies . . . . . . . . . . . . . . . . . . . . 25 Upgrading the MX960 DC Power Supplies Overview . . . . . . . . . . . . . . . . . . . . . . . 27 Removing an MX960 DC Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Installing the MX960 DC High-Capacity Power Supplies . . . . . . . . . . . . . . . . . . . 30 JUNOS Documentation and Release Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Requesting Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Self-Help Online Tools and Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 Opening a Case with JTAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 3 Copyright © 2010, Juniper Networks, Inc.

The MX Series high-capacity fan trays satisfy cooling requirements for high-density DPCs and MPCs, and must be upgraded for proper cooling (see Figure 1 on page 4, Figure 2 on page 4, and Figure 3 on page 5). Additionally, for the MX960 router, you must upgrade both fan trays and the filter tray. NOTE: Before upgrading, the MX Series router must be running Junos OS Release 10.0 R1 or later to support high-capacity fan trays. NOTE: To prevent overheating, install the replacement fan tray immediately after removing the existing fan tray. Figure 1: MX960 High-Capacity Fan Tray g004707 Figure 2: MX480 High-Capacity Fan Tray Copyright © 2010, Juniper Networks, Inc. 4 Upgrading MX240, MX480, and MX960 3D Universal Edge Router Power Supplies and Fan Trays

Replacing the MX240 Fan Tray To remove the fan tray (see Figure 4 on page 6 ): 1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to an approved site ESD grounding point. See the instructions for your site. 2. Loosen the captive screws on the fan tray faceplate. 3. Grasp the fan tray handle and pull it out approximately 1 to 3 inches. 4. Press the latch located on the inside of the fan tray to release it from the chassis. 5. Place one hand under the fan tray to support it and pull the fan tray completely out of the chassis. WARNING: To avoid injury, keep tools and your fingers away from the fans as you slide the fan tray out of the chassis. The fans might still be spinning. NOTE: To prevent overheating, install the replacement fan tray immediately after removing the existing fan tray. 5 Copyright © 2010, Juniper Networks, Inc. Replacing the MX240 Fan Tray

To install the fan tray (see Figure 5 on page 6): 1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis. 2. Grasp the fan tray on each side and insert it straight into the chassis. Note the correct orientation by the "this side up" label on the top surface of the fan tray. 3. Tighten the captive screws on the fan tray faceplate to secure it in the chassis. Figure 5: Reinstalling a Fan Tray Copyright © 2010, Juniper Networks, Inc. 6 Upgrading MX240, MX480, and MX960 3D Universal Edge Router Power Supplies and Fan Trays

To remove the fan tray (see Figure 6 on page 7): 1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist and connect the strap to an approved site ESD grounding point. See the instructions for your site. 2. Loosen the captive screws on the fan tray faceplate. 3. Grasp the fan tray handle and pull it out approximately 1 to 3 inches. 4. Press the latch located on the inside of the fan tray to release it from the chassis. 5. Place one hand under the fan tray to support it and pull the fan tray completely out of the chassis. WARNING: To avoid injury, keep tools and your fingers away from the fans as you slide the fan tray out of the chassis. The fans might still be spinning. NOTE: To prevent overheating, install the replacement fan tray immediately after removing the existing fan tray. Figure 6: Removing the Fan Tray 7 Copyright © 2010, Juniper Networks, Inc. Replacing the MX480 Fan Tray

1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis. 2. Grasp the fan tray on each side, and insert it straight into the chassis. Note the correct orientation by the "this side up" label on the top surface of the fan tray. 3. Tighten the captive screws on the fan tray faceplate to secure it in the chassis. Figure 7: Reinstalling a Fan Tray Replacing the MX960 Fan Trays It is required to upgrade both MX960 fan trays, as well as the fan filter tray. NOTE: To prevent overheating, one fan tray should always be installed and operational during the upgrade process. To remove the upper or lower fan tray: 1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis. 2. Loosen the captive screw on each side of the fan tray faceplate. 3. Grasp both sides of the fan tray and pull it out approximately 1 to 3 inches. Copyright © 2010, Juniper Networks, Inc. 8 Upgrading MX240, MX480, and MX960 3D Universal Edge Router Power Supplies and Fan Trays

from the chassis. 5. Place one hand under the fan tray to support it, and pull the fan tray completely out of the chassis. WARNING: To avoid injury, keep tools and your fingers away from the fans as you slide the fan tray out of the chassis. The fans might still be spinning. NOTE: To prevent overheating, install the replacement fan tray immediately after removing the existing fan tray. Figure 8: Removing an Upper Fan Tray OK 0 FAIL ONLINE OK 1 FAIL ONLINE OK 2 FAIL ONLINE OK 3 FAIL ONLINE OK 4 FAIL ONLINE OK 5 FAIL ONLINE OK 0 FAIL ONLINE MASTER ONLINE OFFLINE RE0 FAN PEM 1 0 0 1 2 3 RE1 OK 1 FAIL ONLINE OK 7 FAIL ONLINE OK 8 FAIL ONLINE OK 9 FAIL ONLINE OK 10 FAIL ONLINE OK 11 FAIL ONLINE OK 2 6 FAIL ONLINE ACO/LT YELLOW ALAR M RED ALAR M NC C NO NC NO C 1 0 1 0 1 0 1 0 1 0 1 1 0 0 1 0 1 0 1 0 g004042 To install the fan trays (see Figure 5 on page 6 and Figure 9 on page 10): 1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis. 2. Grasp the fan tray on each side, and insert it straight into the chassis. Note the correct orientation by the "this side up" label on the top surface of the fan tray. 9 Copyright © 2010, Juniper Networks, Inc. Replacing the MX960 Fan Trays

chassis. 4. Lower the standard cable manager back into position, if necessary. Figure 9: Installing an Upper Fan Tray g006001 OK 0 FAIL ONLINE OK 1 FAIL ONLINE OK 2 FAIL ONLINE OK 3 FAIL ONLINE OK 4 FAIL ONLINE OK 5 FAIL ONLINE OK 0 FAIL ONLINE MASTER ONLINE OFFLINE RE0 FAN PEM 1 0 0 1 2 3 RE1 OK 1 FAIL ONLINE OK 7 FAIL ONLINE OK 8 FAIL ONLINE OK 9 FAIL ONLINE OK 10 FAIL ONLINE OK 11 FAIL ONLINE OK 2 6 FAIL ONLINE ACO/LT YELLOW ALARM RED ALARM NC C NO NC NO C 1 0 1 0 1 0 1 0 1 0 1 1 0 0 1 0 1 0 1 0 Copyright © 2010, Juniper Networks, Inc. 10 Upgrading MX240, MX480, and MX960 3D Universal Edge Router Power Supplies and Fan Trays

OK 0 FAIL ONLINE OK 1 FAIL ONLINE OK 2 FAIL ONLINE OK 3 FAIL ONLINE OK 4 FAIL ONLINE OK 5 FAIL ONLINE OK 0 FAIL ONLINE MASTER ONLINE OFFLINE RE0 FAN PEM 1 0 0 1 2 3 RE1 OK 1 FAIL ONLINE OK 7 FAIL ONLINE OK 8 FAIL ONLINE OK 9 FAIL ONLINE OK 10 FAIL ONLINE OK 11 FAIL ONLINE OK 2 6 FAIL ONLINE ACO/LT YELLOW ALARM RED ALARM NC C NO NC NO C 1 0 1 0 1 0 1 0 1 0 1 1 0 0 1 0 1 0 1 0 g006002 Upgrading the MX960 Air Filter Tray For proper cooling, it is necessary to upgrade the fan filter tray in addition to both fan trays. NOTE: Mixing of high-capacity fan trays and the existing fan filter tray is not supported. Removing the MX960 Air Filter CAUTION: Do not run the router for more than a few minutes without the air filter in place. CAUTION: Always keep the air filter in place while the router is operating, except during replacement. Because the fans are very powerful, they could pull small bits of wire or other materials into the router through the unfiltered air intake. This could damage the router components. 11 Copyright © 2010, Juniper Networks, Inc. Upgrading the MX960 Air Filter Tray

1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis. 2. Unwrap any cables on the standard cable manager and remove the cables from the tray. Arrange the cables so that they do not block the front of the cable manager and tray, and secure them with temporary fasteners so that they are not supporting their own weight as they hang from the connector. NOTE: Removing the cables from the extended cable manager is not necessary to access the air filter. CAUTION: Do not let fiber-optic cable hang free from the connector. Do not allow fastened loops of cable to dangle, which stresses the cable at the fastening point. 3. Simultaneously pull the two releases labeled PULL on the standard cable manager. Lift it up and outward to lock it in place to access the air filter. 4. Slide the air filter tray out of the chassis. 5. Lift the air filter out of the air filter tray. Figure 11: Removing the Air Filter Related Documentation Preventing Electrostatic Discharge Damage to an MX960 Router • • Installing the MX960 Air Filter • Maintaining the MX960 Air Filter Installing the MX960 High-Capacity Tray and Filter To install the air filter (see Figure 12 on page 13); 1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis. 2. Ensure that the air filter is right side up. 3. Place the air filter into the air filter tray. Copyright © 2010, Juniper Networks, Inc. 12 Upgrading MX240, MX480, and MX960 3D Universal Edge Router Power Supplies and Fan Trays

stops. 5. Lower the cable manager back into position. 6. Rearrange the cables in the cable manager. Figure 12: Installing the Air Filter Fan Tray Power Requirements Table 1: Fan Tray Power Requirements Power Requirement (Watts) Component 85 MX240 high-capacity fan tray 160 MX480 high-capacity fan tray 320 MX960 high-capacity fan tray Power Supply Zone Overview Unlike systems with previous MX960 AC supplies, the systems with MX Series high-capacity power supplies are zoned. No current sharing between power supplies is needed with the upgraded system because the redundancy changes from 3+1 per system to 1+1 per zone. For MX960 AC configurations, two zones are present. Two adjacent power supplies need to be installed in the chassis with two feeds attached. To upgrade an MX960 AC router, remove one existing old power supply from either slot 0 or slot 3 (either far left or far right), and replace it with a high-capacity power supply. Attach power feeds and power up the power supply. Remember to turn on both switches while upgrading the MX960 AC power supply, that is, the one on the power supply and the one on the Power Distribution Module (PDU). Continue by removing an adjacent existing power supply, and replacing it with a high-capacity power supply. The minimum number of power supplies must be present in the router at all times. Table 2: Minimum Required Number of Power Supplies Minimum Required Number of Power Supplies Configuration Router Model 1 AC – high line MX240 13 Copyright © 2010, Juniper Networks, Inc. Fan Tray Power Requirements

2 AC – low line MX240 1 (only 1 zone) DC MX240 2 AC – high line MX480 3 AC – low line MX480 1 minimum per zone DC MX480 1 minimum per zone AC MX960 1 minimum per zone DC MX960 Upgrading the MX240 and MX480 AC Power Supplies NOTE: Junos OS Release 10.0 R2 is required to support the MX240 and MX480 AC and DC high capacity power supplies, and the MX960 AC high-capacity power supplies. Junos OS Release 10.2 R1 is required to support the MX960 DC high-capacity power supplies. NOTE: During the upgrade process, the MX Series router can simultaneously run existing and high-capacity power supplies. However, it is recommended to upgrade all power supplies to high-capacity power supplies. Removing the MX240 and MX480 AC Power Supplies NOTE: Theminimumnumberofpowersuppliesmustbepresentintherouter at all times. CAUTION: To maintain proper cooling and prevent thermal shutdown of the operating power supply unit, each power supply slot must contain either a power supply or a blank panel. If you remove a power supply, you must install a replacement power supply or a blank panel shortly after the removal. NOTE: After powering off a power supply, wait at least 60 seconds before turning it back on. Copyright © 2010, Juniper Networks, Inc. 14 Upgrading MX240, MX480, and MX960 3D Universal Edge Router Power Supplies and Fan Trays

1. Switch off the dedicated customer site circuit breaker for the power supply, and remove the power cord from the AC power source. Follow the instructions for your site. 2. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis. 3. Move the AC input switch next to the appliance inlet on the power supply to the off (O) position. 4. Remove the power cord from the power supply. 5. Unscrew the captive screws on the bottom edge of the power supply. 6. Pull the power supply straight out of the chassis. Installing the MX240 and MX480 AC High-Capacity Power Supplies NOTE: Upgrade adjacent power supplies; remove an existing power supply, then install the high-capacity power supply. NOTE: During the upgrade process, you can simultaneously run existing and high-capacity power supplies. However, it is recommended to upgrade all power supplies to high-capacity power supplies. To install an AC power supply (see Figure 13 on page 16): 1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis. 2. Move the AC input switch next to the appliance inlet on the power supply to the off (O) position. 3. Using both hands, slide the power supply straight into the chassis until the power supply is fully seated in the chassis slot. The power supply faceplate should be flush with any adjacent power supply faceplate or blank installed in the power supply slot. 4. Tighten both captive screws at the bottom of the power supply. 5. Attach the power cord to the power supply. 6. Attach the power cord to the AC power source, and switch on the dedicated customer site circuit breaker. Follow the instructions for your site. 7. Move the AC input switch next to the appliance inlet on the power supply to the on (|) position and observe the status LEDs on the power supply faceplate. If the power supply is correctly installed and functioning normally, the AC OK and DC OK LEDs light steadily and the PS FAIL LED is not lit. 15 Copyright © 2010, Juniper Networks, Inc. Installing the MX240 and MX480 AC High-Capacity Power Supplies

Upgrading the MX240 and MX480 DC Power Supplies Removing the MX240 and MX480 DC Power Supplies NOTE: Theminimumnumberofpowersuppliesmustbepresentintherouter at all times. WARNING: Before performing DC power 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. CAUTION: To maintain proper cooling and prevent thermal shutdown of the operating power supply unit, each power supply slot must contain either a power supply or a blank panel. If you remove a power supply, you must install a replacement power supply or a blank panel shortly after the removal. NOTE: After powering off a power supply, wait at least 60 seconds before turning it back on. Copyright © 2010, Juniper Networks, Inc. 16 Upgrading MX240, MX480, and MX960 3D Universal Edge Router Power Supplies and Fan Trays

1. Switch off the dedicated customer site circuit breaker for the power supply being removed. Follow your site's procedures for ESD. 2. Make sure that the voltage across the DC power source cable leads is 0 V and that there is no chance that the cables might become active during the removal process. 3. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis. 4. Move the DC circuit breaker on the DC power supply faceplate to the off (O) position. 5. Remove the clear plastic cover protecting the terminal studs on the faceplate. 6. Remove the nut and washer from each of the terminal studs. (Use a 7/16-in. [11-mm] nut driver or socket wrench.) 7. Remove the cable lugs from the terminal studs. 8. Loosen the captive screws on the bottom edge of the power supply faceplate. 9. Carefully move the power cables out of the way. 10. Pull the power supply straight out of the chassis. Figure 14: Removing a DC Power Supply from the Router Setting the MX240 and MX480 DC High-Capacity Power Supply Input Mode Switch NOTE: Move the input switch to 0 for 60 A input and position 1 for 70 A input. NOTE: Do not set the input mode switch if the power supply is installed in thechassis.Ifthepowersupplyisalreadyinstalled,youmustremoveitbefore setting the input mode switch. 17 Copyright © 2010, Juniper Networks, Inc. Setting the MX240 and MX480 DC High-Capacity Power Supply Input Mode Switch

1. Using a screwdriver, loosen the captive screw holding the metal cover over the input mode switch. 2. Rotate the metal cover away from the input mode switch to expose the switch. 3. Check the setting of the input mode switch. 4. Use a sharp, nonconductive object to slide the switch to the desired position. Figure 15: MX 240 DC and MX480 DC High-Capacity Power Supply Input Mode Switch g004725 CAUTION: Donotuseapencil,becausefragmentscanbreakoffandcause damage to the power supply. 5. Rotate the metal cover over the input mode switch, and use a screwdriver to tighten the captive screw. Copyright © 2010, Juniper Networks, Inc. 18 Upgrading MX240, MX480, and MX960 3D Universal Edge Router Power Supplies and Fan Trays

NOTE: During the upgrade process, you can simultaneously run existing and high-capacity power supplies. However, it is recommended to upgrade all power supplies to high-capacity power supplies. WARNING: Before performing DC power 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. To install a DC power supply (see Figure 16 on page 21): 1. Ensure that the voltage across the DC power source cable leads is 0 V and that there is no chance that the cable leads might become active during installation. 2. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis. 3. Move the DC circuit breaker on the power supply faceplate to the off (O) position. 4. Using both hands, slide the power supply straight into the chassis until the power supply is fully seated in the chassis slot. The power supply faceplate should be flush with any adjacent power supply faceplate or blank installed in the power supply slot. 5. Tighten the captive screws on the lower edge of the power supply faceplate. 6. Remove the clear plastic cover protecting the terminal studs on the faceplate. 7. Remove the nut and washer from each of the terminal studs. 8. Secure each power cable lug to the terminal studs, first with the flat washer, then with the split washer, and then with the nut (see Figure 17 on page 22). Apply between 23 lb-in. (2.6 Nm) and 25 lb-in. (2.8 Nm) of torque to each nut. Do not overtighten the nut. (Use a 7/16-in. [11 mm] torque-controlled driver or socket wrench.) a. Secure the positive (+) DC source power cable lug to the RTN (return) terminal. b. Secure the negative (–) DC source power cable lug to the –48V (input) terminal. CAUTION: Ensurethateachpowercablelugseatsflushagainstthesurface of the terminal block as you are tightening the nuts. Ensure that each nut is properly threaded onto the terminal stud. The nut should be able to spin freely with your fingers when it is first placed onto the terminal stud. Applying installation torque to the nut when improperly threaded may result in damage to the terminal stud. 19 Copyright © 2010, Juniper Networks, Inc. Installing the MX240 and MX480 DC High-Capacity Power Supplies

power supply is 36 lb-in. (4.0 Nm). The terminal studs may be damaged if excessive torque is applied. Use only a torque-controlled driver or socket wrench to tighten nuts on the DC power supply terminal studs. CAUTION: You must ensure that power connections maintain the proper polarity. The power source cables might be labeled (+) and (–) to indicate their polarity. There is no standard color coding for DC power cables. The color coding used by the external DC power source at your site determines the color coding for the leads on the power cables that attach to the terminal studs on each power supply. NOTE: The DC power supplies in PEM0 and PEM1 must be powered by dedicated power feeds derived from feed A, and the DC power supplies in PEM2 and PEM3 must be powered by dedicated power feeds derived from feed B. This configuration provides the commonly deployed A/B feed redundancy for the system. NOTE: For information about connecting to DC power sources, see DC Power Supply Electrical Specifications for the MX480 Router. 9. Replace the clear plastic cover over the terminal studs on the faceplate. 10. Route the power cables along the cable restraint toward the left or right corner of the chassis. If needed to hold the power cables in place, thread plastic cable ties, which you must provide, through the openings on the cable restraint. 11. Verify that the power cabling is correct, that the cables are not touching or blocking access to router components, and that they do not drape where people could trip on them. 12. Switch on the dedicated customer site circuit breakers. Follow your site's procedures for safety and ESD. Verify that the INPUT OK LED on the power supply is lit green. 13. On each of the DC power supplies, switch the DC circuit breaker to the center position before moving it to the on (—) position. NOTE: The circuit breaker may bounce back to the off (O) position if you move the breaker too quickly. Copyright © 2010, Juniper Networks, Inc. 20 Upgrading MX240, MX480, and MX960 3D Universal Edge Router Power Supplies and Fan Trays

installed and functioning normally, the PWR OK, BRKR ON, and INPUT OK LEDs light green steadily. NOTE: If more than one power supply is being installed, turn on all power supplies at the same time. NOTE: An SCB must be present for the PWR OK LED to go on. Figure 16: Installing a DC Power Supply in the Router 21 Copyright © 2010, Juniper Networks, Inc. Installing the MX240 and MX480 DC High-Capacity Power Supplies

Upgrading the MX960 AC Power Supplies Overview To upgrade the MX960 AC power supplies: 1. Remove one existing old power supply from either slot 0 or slot 3 (either far left or far right), and replace it with a high-capacity power supply. 2. On the high-capacity power supply, rotate the metal cover away from the input mode switch to expose the switch. 3. Move the input mode switch to position 0 for one feed or position 1 for two feeds (see Figure 18 on page 23). CAUTION: Donotuseapencil,becausefragmentscanbreakoffandcause damage to the power supply. 4. Attach power feeds and power up the power supply. 5. Remember to turn on both switches while upgrading the MX960 AC power supply (the one on the power supply and the one on the Power Distribution Module [PDM]). 6. Continue by removing an adjacent existing power supply and replacing it with a high-capacity power supply. Copyright © 2010, Juniper Networks, Inc. 22 Upgrading MX240, MX480, and MX960 3D Universal Edge Router Power Supplies and Fan Trays

g004714 Removing the MX960 AC Power Supplies Before you remove a power supply, be aware of the following: NOTE: Theminimumnumberofpowersuppliesmustbepresentintherouter at all times. CAUTION: To maintain proper cooling and prevent thermal shutdown of the operating power supply unit, each power supply slot must contain either a power supply or a blank panel. If you remove a power supply, you must install a replacement power supply or a blank panel shortly after the removal. NOTE: After powering off a power supply, wait at least 60 seconds before turning it back on. To remove an AC power supply (see Figure 19 on page 24): 1. Switch off the dedicated customer site circuit breaker for the power supply, and remove the power cord from the AC power source. Follow the ESD and disconnection instructions for your site. 2. Move the AC input switch in the chassis above the power supply to the off (O) position. 3. While grasping the handle on the power supply faceplate with one hand, use your other hand to pull the spring-loaded locking pin in the release lever away from the chassis and turn the release lever counterclockwise until it stops. 4. Let go of the locking pin in the release lever. Ensure that the pin is seated inside the corresponding hole in the chassis. 5. Pull the power supply straight out of the chassis. 23 Copyright © 2010, Juniper Networks, Inc. Removing the MX960 AC Power Supplies

supply. It can contain dangerous voltages. Figure 19: Removing an MX960 AC Power Supply Copyright © 2010, Juniper Networks, Inc. 24 Upgrading MX240, MX480, and MX960 3D Universal Edge Router Power Supplies and Fan Trays

NOTE: During the upgrade process, you can simultaneously run existing and high- capacity power supplies. However, it is recommended to upgrade all power supplies to high-capacity power supplies. To install an AC power supply (see Figure 13 on page 16): 1. Move the AC input switch in the chassis above the empty power supply slot to the off (O) position. 2. Ensure that the release lever below the empty power supply slot is locked in the counterclockwise position (see Figure 13 on page 16). If necessary, pull the spring-loaded locking pin in the release lever away from the chassis and turn the release lever counterclockwise until it stops. Let go of the locking pin in the release lever. Ensure that the pin is seated inside the corresponding hole in the chassis. 3. Using both hands, slide the power supply straight into the chassis until the power supply is fully seated in the chassis slot. The power supply faceplate should be flush with any adjacent power supply faceplates. The small tab on the metal housing that is controlled by the release lever must be inside of the corresponding slot at the bottom of the power supply (see Figure 20 on page 26). This tab is used to pull the power supply down in the chassis slot, prior to removing the power supply. 4. While firmly pushing the handle on the power supply faceplate with one hand, use your other hand to pull the spring-loaded locking pin in the release lever away from the chassis and turn the release lever clockwise until it stops. 5. Let go of the locking pin in the release lever. Ensure that the pin is seated inside the corresponding hole in the chassis. 6. Move the AC input switch in the chassis above the power supply to the on (—) position and observe the status LEDs on the power supply faceplate. If the power supply is correctly installed and functioning normally, the AC OK and DC OK LEDs light steadily, and the PS FAIL LED is not lit. 25 Copyright © 2010, Juniper Networks, Inc. Installing the MX960 AC High-Capacity Power Supplies

g004700 AC-1 OK AC-2 OK DC OK PS FAIL AC-1 OK AC-2 OK DC OK PS FAIL AC-1 OK AC-2 OK DC OK PS FAIL AC-1 OK AC-2 OK DC OK PS FAIL Protective earthing ESD point Power supply ejectors AC Power supplies Air exhaust Air exhaust NOTE: The MX960 DC power supplies protrude approximately 2 inches from the back of the chassis. See Figure 21 on page 27. Copyright © 2010, Juniper Networks, Inc. 26 Upgrading MX240, MX480, and MX960 3D Universal Edge Router Power Supplies and Fan Trays

Supplies Installed Rear of chassis Front of chassis 17.4" (44.2 cm) 24.5" (62.2 cm) g003496 Front-mounting flange 19.2" (48.7 cm) 24" (61 cm) clearance required 30" (76.2 cm) clearance recommended Standard cable manager 34.8" (88.4 cm) Upgrading the MX960 DC Power Supplies Overview To upgrade the MX960 DC power supplies: 1. Remove one existing old power supply from either slot 0 or slot 3 (either far left or far right), and replace it with a high-capacity power supply. 2. On the high-capacity power supply, rotate the metal cover away from the input mode switch to expose the switch. 3. Move the input mode switch to position 0 for one feed or position 1 for two feeds. NOTE: For a fully redundant configuration in two-feed mode, 8 feeds are required. For a non-redundant configuration, 4 feeds are required. 27 Copyright © 2010, Juniper Networks, Inc. Upgrading the MX960 DC Power Supplies Overview

CAUTION: Donotuseapencil,becausefragmentscanbreakoffandcause damage to the power supply. 4. Attach power feeds and power up the power supply. 5. Continue by removing an adjacent existing power supply and replacing it with a high-capacity power supply. Removing an MX960 DC Power Supply Before you remove a power supply, be aware of the following: NOTE: Theminimumnumberofpowersuppliesmustbepresentintherouter at all times. WARNING: Before performing DC power 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. CAUTION: To maintain proper cooling and prevent thermal shutdown of the operating power supply unit, each power supply slot must contain either a Copyright © 2010, Juniper Networks, Inc. 28 Upgrading MX240, MX480, and MX960 3D Universal Edge Router Power Supplies and Fan Trays

a replacement power supply or a blank panel shortly after the removal. NOTE: After powering off a power supply, wait at least 60 seconds before turning it back on. To remove a DC power supply (see Figure 14 on page 17): 1. Switch off the dedicated customer site circuit breaker for the power supply being removed. Follow your site's procedures for ESD. 2. Make sure that the voltage across the DC power source cable leads is 0 V and that there is no chance that the cables might become active during the removal process. 3. Verify that the INPUT OK LEDs on the power supply to be removed are not lit. 4. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis. 5. Move the DC circuit breaker on the power supply faceplate to the off (O) position. 6. Remove the clear plastic cover protecting the terminal studs on the faceplate. 7. Remove the nut and washer from each of the terminal studs. (Use a 7/16-in. [11-mm] nut driver or socket wrench.) 8. Remove the cable lugs from the terminal studs. 9. Loosen the captive screw on the cable restraint on the lower edge of the power supply faceplate. 10. Carefully move the power cables out of the way. 11. While grasping the handle on the power supply faceplate with one hand, use your other hand to pull the spring-loaded locking pin in the release lever away from the chassis and turn the release lever counterclockwise until it stops. 12. Let go of the locking pin in the release lever. Ensure that the pin is seated inside the corresponding hole in the chassis. 13. Pull the power supply straight out of the chassis. WARNING: Do not touch the power connector on the top of the power supply. It can contain dangerous voltages. 29 Copyright © 2010, Juniper Networks, Inc. Removing an MX960 DC Power Supply

Installing the MX960 DC High-Capacity Power Supplies WARNING: Before performing DC power 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. To install a DC power supply (see Figure 16 on page 21): 1. Ensure that the voltage across the DC power source cable leads is 0 V and that there is no chance that the cable leads might become active during installation. 2. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis. 3. Move the switch on the power supply faceplate to the off (O) position. Copyright © 2010, Juniper Networks, Inc. 30 Upgrading MX240, MX480, and MX960 3D Universal Edge Router Power Supplies and Fan Trays

counterclockwise position (see Figure 16 on page 21). If necessary, pull the spring-loaded locking pin in the release lever away from the chassis and turn the release lever counterclockwise until it stops. Let go of the locking pin in the release lever. Ensure that the pin is seated inside the corresponding hole in the chassis. 5. Using both hands, slide the power supply straight into the chassis until the power supply is fully seated in the chassis slot. The small tab on the metal housing that is controlled by the release lever must be inside of the corresponding slot at the bottom of the power supply (see Figure 16 on page 21). This tab is used to pull the power supply down in the chassis slot, prior to removing the power supply. 6. While firmly pushing the handle on the power supply faceplate with one hand, use your other hand to pull the spring-loaded locking pin in the release lever away from the chassis and turn the release lever clockwise until it stops. 7. Let go of the locking pin in the release lever. Ensure that the pin is seated inside the corresponding hole in the chassis. 8. Remove the cover protecting the terminal studs on the faceplate. 9. Remove the nut and washer from each of the terminal studs. 10. Secure each power cable lug to the terminal studs, first with the split washer, then with the nut. Apply between 23 lb-in. (2.6 Nm) and 25 lb-in. (2.8 Nm) of torque to each nut (see Figure 17 on page 22). Do not overtighten the nut. (Use a 7/16-in. [11-mm] torque-controlled driver or socket wrench.) a. Attach the positive (+) DC source power cable lug to the RTN (return) terminal. b. Attach the negative (–) DC source power cable lug to the –48V (input) terminal. CAUTION: Ensurethateachpowercablelugseatsflushagainstthesurface of the terminal block as you are tightening the nuts. Ensure that each nut is properly threaded onto the terminal stud. The nut should be able to spin freely with your fingers when it is first placed onto the terminal stud. Applying installation torque to the nut when improperly threaded may result in damage to the terminal stud. CAUTION: The maximum torque rating of the terminal studs on the DC power supply is 36 lb-in. (4.0 Nm). The terminal studs may be damaged if excessive torque is applied. Use only a torque-controlled driver or socket wrench to tighten nuts on the DC power supply terminal studs. 31 Copyright © 2010, Juniper Networks, Inc. Installing the MX960 DC High-Capacity Power Supplies

polarity. The power source cables might be labeled (+) and (–) to indicate their polarity. There is no standard color coding for DC power cables. The color coding used by the external DC power source at your site determines the color coding for the leads on the power cables that attach to the terminal studs on each power supply. NOTE: The DC power supplies in slots PEM0 and PEM1 must be powered by dedicated power feeds derived from feed A, and the DC power supplies in PEM2 and PEM3 must be powered by dedicated power feeds derived from feed B. This configuration provides the commonly deployed A/B feed redundancyforthesystem.ForinformationaboutconnectingtoDCpower sources, see DC Power Supply Electrical Specifications for the MX960 Router. 11. Loosen the captive screw on the cable restraint on the lower edge of the power supply faceplate. 12. Route the positive and negative DC power cables through the left and right sides of the cable restraint. 13. Tighten the cable restraint captive screw to hold the power cables in place. 14. Replace the clear plastic cover over the terminal studs on the faceplate. 15. Verify that the power cabling is correct, that the cables are not touching, and that they do not block access to router components or drape where people could trip on them. 16. Switch on the dedicated customer site circuit breaker. 17. Verify that the INPUT OK LED on the power supply is lit steadily. 18. On each of the DC power supplies, move the switch to the on (|) position. NOTE: The switch may bounce back to the off (O) position if you move the breaker too quickly. 19. Verify that the DC OK LED is lit steadily. Copyright © 2010, Juniper Networks, Inc. 32 Upgrading MX240, MX480, and MX960 3D Universal Edge Router Power Supplies and Fan Trays

NOTE: The MX960 DC power supplies protrude approximately 5 inches from the back of the chassis. JUNOS Documentation and Release Notes For a list of related JUNOS documentation, see http://www.juniper.net/techpubs/software/junos/ . If the information in the latest release notes differs from the information in the documentation, follow the JUNOS Release Notes. To obtain the most current version of all Juniper Networks ® technical documentation, see the product documentation page on the Juniper Networks website at http://www.juniper.net/techpubs/. Requesting Technical Support Technical product support is available through the Juniper Networks Technical Assistance Center (JTAC). If you are a customer with an active J-Care or JNASC support contract, or are covered under warranty, and need postsales technical support, you can access our tools and resources online or open a case with JTAC. • JTAC policies—For a complete understanding of our JTAC procedures and policies, review the JTAC User Guide located at http://www.juniper.net/us/en/local/pdf/resource-guides/7100059-en.pdf . 33 Copyright © 2010, Juniper Networks, Inc. JUNOS Documentation and Release Notes

http://www.juniper.net/support/warranty/ . • JTAC Hours of Operation —The JTAC centers have resources available 24 hours a day, 7 days a week, 365 days a year. Self-Help Online Tools and Resources For quick and easy problem resolution, Juniper Networks has designed an online self-service portal called the Customer Support Center (CSC) that provides you with the following features: • Find CSC offerings: http://www.juniper.net/customers/support/ • Find product documentation: http://www.juniper.net/techpubs/ • Find solutions and answer questions using our Knowledge Base: http://kb.juniper.net/ • Download the latest versions of software and review release notes: http://www.juniper.net/customers/csc/software/ • Search technical bulletins for relevant hardware and software notifications: https://www.juniper.net/alerts/ • Join and participate in the Juniper Networks Community Forum: http://www.juniper.net/company/communities/ • Open a case online in the CSC Case Management tool: http://www.juniper.net/cm/ To verify service entitlement by product serial number, use our Serial Number Entitlement (SNE) Tool: https://tools.juniper.net/SerialNumberEntitlementSearch/ Opening a Case with JTAC You can open a case with JTAC on the Web or by telephone. • Use the Case Management tool in the CSC at http://www.juniper.net/cm/ . • Call 1-888-314-JTAC (1-888-314-5822 toll-free in the USA, Canada, and Mexico). For international or direct-dial options in countries without toll-free numbers, visit us at http://www.juniper.net/support/requesting-support.html Revision History December 2010—Added note regarding required feeds for MX960 DC high-capacity power supplies. August 2010—Added MX960 DC high-capacity power supply content. April 2010—Initial release. Copyright © 2010, Juniper Networks, Inc. All rights reserved. Juniper Networks, Junos, Steel-Belted Radius, NetScreen, and ScreenOS are registered trademarks of Juniper Networks, Inc. in the United States and other countries. The Juniper Networks Logo, the Junos logo, and JunosE are trademarks of Juniper Networks, Inc. All other trademarks, service marks, registered trademarks, or registered service marks are the property of their respective owners. Copyright © 2010, Juniper Networks, Inc. 34 Upgrading MX240, MX480, and MX960 3D Universal Edge Router Power Supplies and Fan Trays

transfer, or otherwise revise this publication without notice. Products made or sold by Juniper Networks or components thereof might be covered by one or more of the following patents that are owned by or licensed to Juniper Networks: U.S. Patent Nos. 5,473,599, 5,905,725, 5,909,440, 6,192,051, 6,333,650, 6,359,479, 6,406,312, 6,429,706, 6,459,579, 6,493,347, 6,538,518, 6,538,899, 6,552,918, 6,567,902, 6,578,186, and 6,590,785. 35 Copyright © 2010, Juniper Networks, Inc. Requesting Technical Support