User manual JUNIPER NETWORKS MX240 FAN TRAY UPGRADE REV1 4-2010

[. . . ] Upgrading MX240, MX480, and MX960 3D Universal Edge Router Fan Trays and Power Supplies April 2010 Part Number: 530-035370 Revision 01 This document describes the necessary steps to be taken to upgrade any MX series 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 fantrays are not supported outside of the upgrade window. NOTE: Before upgrading, the MX Series router ust be running JUNOS Release 10. 0 R1 or later to support high-capacity fan trays and JUNOS Release 10. 0 R2 to support high-capacity power supplies. The rating upgrade is needed to ensure the chassis rating is in line with the optional higher capacity power supplies that may be installed in your MX Series platform. [. . . ] 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. Figure 13: Installing an AC Power Supply Upgrading the MX240 and MX480 DC Power Supplies Removing the MX240 and MX480 DC Power Supplies NOTE: The minimum number of power supplies must be present in the router 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. Upgrading the MX240 and MX480 DC Power Supplies 15 Upgrading MX240, MX480, and MX960 3D Universal Edge Router Power Supplies and Fan Trays NOTE: After powering off a power supply, wait at least 60 seconds before turning it back on. 2. Switch off the dedicated customer site circuit breaker for the power supply being removed. 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. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis. Move the DC circuit breaker on the DC power supply faceplate to the off (O) position. Remove the clear plastic cover protecting the terminal studs on the faceplate. [11 mm] nut driver or socket wrench. ) Remove the cable lugs from the terminal studs. Loosen the captive screws on the bottom edge of the power supply faceplate. 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. 16 Setting the MX240 and MX480 DC High-Capacity Power Supply Input Mode Switch Setting the MX240 and MX480 DC High-Capacity Power Supply Input Mode Switch NOTE: Do not set the input mode switch if the power supply is installed in the chassis. If the power supply is already installed, you must remove it before setting the input mode switch. 4. Using a screwdriver, loosen the captive screw holding the metal cover over the input mode switch. Rotate the metal cover away from the input mode switch to expose the switch. 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 CAUTION: Do not use a pencil, because fragments can break off and cause damage to the power supply. Rotate the metal cover over the input mode switch, and use a screwdriver to tighten the captive screw. 5. g004725 Setting the MX240 and MX480 DC High-Capacity Power Supply Input Mode Switch 17 Upgrading MX240, MX480, and MX960 3D Universal Edge Router Power Supplies and Fan Trays Installing the MX240 and MX480 DC High-Capacity Power Supplies 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. 4. 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. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis. 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. [. . . ] Ensure that the release lever below the empty power supply slot is locked in the counterclockwise position (see Figure 13 on page 15). 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. 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. [. . . ]