User manual JUNIPER NETWORKS MX960 UPGRADING

[. . . ] Upgrading MX240, MX480, and MX960 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. [. . . ] Move the DC circuit breaker on the power supply faceplate to the off (O) position. 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. Remove the clear plastic cover protecting the terminal studs on the faceplate. 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). Secure the positive (+) DC source power cable lug to the RTN (return) terminal. Secure the negative (­) DC source power cable lug to the ­48V (input) terminal. CAUTION: Ensure that each power cable lug seats flush against the surface of the terminal block as you are tightening the nuts. 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. Copyright © 2010, Juniper Networks, Inc. 19 Upgrading MX240, MX480, and MX960 3D Universal Edge Router Power Supplies and Fan Trays CAUTION: The maximum torque rating of the terminal studs on the DC power supply is 36 lb-in. 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. 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. 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. 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. 20 Copyright © 2010, Juniper Networks, Inc. Installing the MX240 and MX480 DC High-Capacity Power Supplies Observe the status LEDs on the power supply faceplate. If the power supply is correctly 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 Copyright © 2010, Juniper Networks, Inc. 21 Upgrading MX240, MX480, and MX960 3D Universal Edge Router Power Supplies and Fan Trays Figure 17: Connecting DC Power to the Router 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: Do not use a pencil, because fragments can break off and cause damage to the power supply. 4. [. . . ] 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. Use only a torque-controlled driver or socket wrench to tighten nuts on the DC power supply terminal studs. Copyright © 2010, Juniper Networks, Inc. 31 Upgrading MX240, MX480, and MX960 3D Universal Edge Router Power Supplies and Fan Trays CAUTION: You must ensure that power connections maintain the proper polarity. The power source cables might be labeled (+) and (­) to indicate their polarity. 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. [. . . ]