Fast Track to Rack Installation and Power

Mount the Router

To connect the MX2020 router to a four-post rack using a router transport kit (model number MX2K-TRNSPRT-KIT):

1. Slide the four-post rack mounting shelf between the rack rails, resting the bottom of the shelf on the rack supports. The four-post rack mounting shelf installs on the rear rack rails, extending toward the front of the rack.

   Note:

   There must be a minimum of 45-U unobstructed front-to-back usable rack space when installing the MX2020 router into a four-post rack or cabinet.

2. On the front of the rear rack rails, partially insert screws into the holes in each ear of the four-post rack mounting shelf.

   Figure 1: Mounting Hardware for a Four-Post Rack or Cabinet

3. Partially insert screws into the open holes in the front ears of the four-post rack mounting shelf.

4. Tighten all the screws completely.

5. Because of the router's size and weight, you must first remove the components from the chassis before installation.

   Figure 2: Components to Remove from the Front of the MX2020 Router

   Table 1: Components to Remove from the Front of the MX2020 Router

   Component No.	Component Description	Slots	Number of FRUs
   1	MPCs with ADCs and MICs (top)	10 through 19 (top)	10
   2	Switch Fabric Boards (SFBs)	0 through 7	8
   3	Control Board and Routine Engine (CB-RE)	0 and 1	2
   4	MPCs with ADCs and MICs (bottom)	0 through 9	10

   Figure 3: Components to Remove from the Rear of an AC-Powered MX2020 Router

   Table 2: Components to Remove from the Rear of an AC-Powered MX2020 Router

   Component No.	Component Description	Slots	Number of FRUs
   1	Upper fan trays (two)	Fan tray 2 and fan tray 3 (behind cage door)	2
   2	AC PDM—Three-phase delta or wye	PDM3/Input1	1
   3	AC PSM	9 through 17	9
   4	PSM air filter	–	1
   5	AC PDM—Three-phase delta or wye	PDM2/Input0	1
   6	AC PDM—Three-phase delta or wye	PDM1/Input1	1
   7	AC PSM	0 through 8	9
   8	PSM air filter	–	1
   9	AC PDM—Three-phase delta or wye	PDM0/Input0	1
   10	Fan tray air filter	–	1
   11	Lower fan trays (two)	Fan tray 0 and fan tray 1 (behind access door)	2

   To remove the components from the router:

   1. Slide each component out of the chassis evenly so that it does not become stuck or damaged.

   2. Label each component as you remove it so you can reinstall it in the correct location.

   3. Immediately store each removed component in an electrostatic bag.

   4. Lay each one on a flat surface. Do not stack removed components.

   To remove the upper and lower fan tray:

   1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to an approved site ESD grounding point. Refer the instructions for your site.

   2. Loosen the two captive screws on each side of the fan tray access panel and open.

   3. Loosen the two captive screws on the fan tray faceplate.

   4. Press and hold the latch while simultaneously pulling the fan tray out approximately 1 to 3 in. Place one hand under the fan tray for support, while pulling the fan tray completely out of the router.

      Note:

      The double latch system is a safety mechanism, so you cannot pull the fan tray out in one motion.

   5. Place each component on an antistatic mat resting on a stable, flat surface. Do not stack fan trays on top of another after you remove them.

      Figure 4: Removing Upper Fan Trays
      Figure 5: Removing Lower Fan Trays
      Note:

      For complete instructions on removing router components, see Removing Components from the MX2020 Router Chassis Before Installing it in a Rack.

6. Remove the router transport kit from the shipping crate (see Unpacking the Router Transport Kit).

7. Remove the winch strap plate that is secured to the winch mount by using a 9/16-in. (14 mm) socket wrench, and set the plate aside.

8. Using a number 3 Phillips screwdriver, loosen the captive screws that secure the winch mount to the router transport kit, and set the mount aside.

9. Using a number 3 Phillips screwdriver, loosen the captive screws that secure the router transport mounting plate and wheel assembly (left and right) to the router transport platform, and set them aside.

   Figure 6: Preparing the Router Transport Kit for Installation

10. Remove the four shipping brackets that secure the router to the shipping crate platform by using a 9/16-in. (14 mm) socket wrench, and a number 2 Phillips screwdriver, and set the brackets aside.

11. Align the left router transport mounting plate and wheel assembly (indicated by left arrow) with the holes on the left side of the chassis.

    Figure 7: Installing the Router Transport Kit onto the MX2020 Router

12. Using a number 3 Phillips screwdriver, tighten the captive screws to secure the router transport mounting plate and wheel assembly to the chassis.

13. Align the right router transport mounting plate and wheel assembly (indicated by right arrow) with the holes on the right side of the chassis (see Figure 7).

14. Using a number 3 Phillips screwdriver, tighten the captive screws to secure the router transport mounting plate and wheel assembly to the chassis.

15. Once you have installed the router transport kit onto the router, you can now secure the router to the transport platform. Reinstall the front and rear shipping covers to help guide the chassis during installation.

16. Using the shipping crate door as a ramp, secure the door to the crate platform by using the two metal latches.

    Figure 8: Securing the Crate Door to the Shipping Crate Platform

17. Using a two-person team on either side of the chassis, turn the handles on the router transport 4–5 times until the chassis is raised approximately 1 in. (2.54 cm), making sure that the chassis is level.

    Note:

    The router transport kit is equipped with four T-shaped levels on top of each of the four router transport mounting brackets. Make sure that the bubbles within the T-shaped levels are between the lines, indicating that the chassis is level.

    CAUTION:

    Do not raise the chassis above 1 in. (2.54 cm). This ensures the router will not tilt during transportation, which can result in injury or damage to the router.

18. Turn the four wheels on the router transport kit toward the rear of the chassis.

19. Grasping the handles on the shipping covers, carefully guide the chassis down the crate ramp to the rack location.

    Warning:

    Do not push or pull the router fast during transporting. Doing so can cause the wheels to turn abruptly and tilt the router over.

20. Position the router transport platform directly under the router, aligning the router transport platform with the bottom of the chassis by adjusting the four leveling mounts.

21. Secure the router transport platform to the router transport mounting plates by using the four latch locks.

    Figure 9: Securing the Router Transport Platform

22. Install the winch strap plate to the rear of the router by using the four captive screws, and tighten the screws.

    Figure 10: Installing Winch Strap Plate

23. Using a four-person team, transport the router to the rack installation location and center it in front of the mounting shelf.

24. Install the winch mount bracket to the rear rack rails by using the six captive screws, and tighten the screws.

    Figure 11: Installing Winch Mount Bracket to Rack Rails

25. Adjust the height of the router by turning the handles clockwise until the router transport platform is aligned with the surface of the mounting shelf and slightly higher than the mounting shelf.

    Note:

    Make sure the bubbles within the T-shaped levels are between the lines, indicating the router is level.

    Figure 12: Aligning the MX2020 Router with Rack Mounting Shelf

26. Adjust the four leveling mounts on the router transport platform until all four leveling mounts rest firmly on the ground (see Figure 12).

27. Unlock the four toggle latches that secure the router transport platform to the router transport mounting plate and wheel assembly.

28. Lift the wheels up by turning the handles counterclockwise so that the weight of the router is on the router transport platform.

29. Using a number 3 Phillips screwdriver, loosen the captive screws that secure the router transport mounting plates and wheel assembly to the chassis, and set them aside.

    Figure 13: Removing Router Transport Mounting Plate and Wheel Assembly

30. Attach the winch strap to the winch strap plate at the rear of the router.

    Figure 14: Attaching Winch Strap to Winch Strap Plate

31. Attach a 1-1/8 in. (28.57 mm) socket wrench to the winch mechanism and turn clockwise to start pulling the chassis into the rack.

    Figure 15: Pulling the MX2020 into the Rack
    Note:

    A four-person team is needed to carefully guide the router into the rack while operating the winch.

    Note:

    If the router is not pulled all the way into the rack by the winch mechanism, grasp the handles on the shipping covers and carefully slide the router onto the mounting shelf until the front-mounting flanges contact the rack rails. You must remove the winch bracket to perform this procedure.

    Note:

    There must be a minimum of 45-U of usable rack space when installing the MX2020 into a 45-U rack.

32. Remove the router transport platform, and set the platform aside.

33. Remove the winch mount and winch strap plate, and set them aside.

34. Insert sixteen mounting screws (eight on each side) into the mounting holes to secure the router to the rack.

35. Visually inspect the alignment of the router. To verify that the router is installed properly in the rack, see that all the mounting screws on one side of the rack are aligned with the mounting screws on the opposite side and the router is level.

36. Reassemble the router transport kit, and set aside.

37. Reinstall the components in the router:

    1. Take each component out of its electrostatic bag, and identify the slot on the component where it will be connected.

    2. Slide each component into the chassis evenly so that it does not become stuck or damaged.

       Note:

       We recommend that you reinstall the rear components first.

    3. Tighten the captive screws, and secure all levers for each component.

       Note:

       Make sure that all empty slots are covered with a blank panel before operating the router.

Ground the Router

To meet safety and electromagnetic interference (EMI) requirements and to ensure proper operation, you must connect the chassis to earth ground. Make this connection before you connect the router to power.

To connect the MX2020 router to earth ground:

1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to an approved site ESD grounding point. Refer the instructions for your site.

2. Connect the grounding cable to a proper earth ground.

3. Verify that a licensed electrician has attached the cable lug provided with the router to the grounding cable.

4. Make sure that grounding surfaces are clean and brought to a bright finish before you make grounding connections.

5. Place the grounding cable lug over the grounding points. The upper pair is sized for UNC 1/4-20 bolts, and the lower pair is sized for M6 bolts.

6. Secure the grounding cable lug to the grounding points, first with the washers, and then with the nuts.

   Figure 16: Grounding Points on the MX2020 Router

7. Verify that the grounding cabling is correct, that the grounding cable does not touch or block access to router components, and that it does not drape where people could trip on it.

Connect the Power Cable and Power On the Router

To connect power to a three-phase delta AC power distribution module:

1. Switch off the dedicated customer-site circuit breakers. Ensure that the voltage across the AC power source cable leads is 0 V and that there is no chance that the cable leads might become active during installation.

2. Detach the ESD grounding strap from the approved site ESD grounding point, and connect the strap to one of the ESD points on the chassis.

3. Switch off (O) the AC power supply modules (PSMs) and disengage all AC PSMs.

4. Verify that the correct three-phase delta AC PDMs are installed and secured in the chassis before connecting power cables.

   Note:

   The power cables must be uninstalled and removed from the PDM before the PDM is removed from the chassis.

5. Using a number 2 Phillips (+) screwdriver, unscrew the four captive screws located on the either side of the metal AC wiring compartment (four screws total per PDM).

6. Remove the cover of the metal AC wiring compartment.

7. Unscrew the retaining nut from the AC power cord.

8. Put the wires of the AC power cord through the hole of the retaining nut and rubber grommet.

9. Put the wires of the AC power cord through the hole of the metal wiring compartment.

10. Connect the wires to the AC terminal block on the three-phase delta AC PDM (see Figure 17). Figure 18 shows the three-phase delta AC power cord and connector. Loosen the input terminal or grounding point screw, insert each wire into the grounding point or input terminal, and tighten the screw (see Table 3 for approved AC wire gauge).

    Note:

    The terminal connections have either slotted screws or hex screws. Use a 1/4-in. slotted screwdriver for the slotted screws. Use a 5/32-in. (4 mm) Allen wrench for the 5/16-in. hex screws.

    Note:

    The three-phase delta AC PDM must be installed and secured in the chassis before connecting the power input cables. If the PDM must be removed, both input power cables must be uninstalled and removed from the PDM before the PDM can be removed from the chassis. The MX2020 chassis is not sensitive to phase rotation sequence—either clockwise or counterclockwise will operate correctly.

    To connect wires to the terminal block that serves six PSMs:

    1. Insert the grounding wire into the grounding point labeled GND.

    2. Insert the wire labeled L1 into the input terminal labeled A1.

    3. Insert the wire labeled L2 into the input terminal labeled B1.

    4. Insert the wire labeled L3 into the input terminal labeled C1.

    Figure 17: Connecting Power to a Three-Phase Delta AC Power Distribution Module
    Figure 18: Three-Phase Delta AC Power Cord
    Note:

    The three-phase delta AC PDM terminal blocks will be flipped depending on which slot the PDM gets plugged into.

    CAUTION:

    Wire label configuration is for Juniper Networks supplied cable only. If you are using your own cable, make sure that you use the proper connections.

    To connect wires to the terminal block that serves three PSMs:

    1. Insert the grounding wire into the grounding point labeled GND.

    2. Insert the wire labeled L1 into the input terminal labeled A2.

    3. Insert the wire labeled L2 into the input terminal labeled B2.

    4. Insert the wire labeled L3 into the input terminal labeled C2.

    Warning:

    To protect power supplies from input voltage that might be caused by miswired PDMs, before reinstalling the metal cover to the wiring compartment apply AC voltage to the PDM (with disengaged PSM) to make sure that two LEDs on the PDM are lit green and that the AC voltage between AC terminal blocks A1-B1, B1-C1, C1-A1, A2-B2, B2-C2, and C2-A2 for three-phase delta PDM is not more than 264VAC when measured with a digital voltage meter (DVM). Then turn off the AC breaker, de-energizing the PDM, and install the metal cover and engage all AC PSMs.

    Note:

    The color of each AC power wire might vary.

    Note:

    Three-phase delta AC wire assembly kits can be purchased from Juniper Networks.

    Table 3: Supported Three-Phase Delta AC Wire Gauge

    Wire Gauge	Description
    4 x 6-AWG or equivalent	4 conductor wires, each wire is 6-AWG

    Note:

    We recommend that you use the proper gauge wire in order for the cable clamps to hold the AC cables. Using smaller gauge wiring will result in the cable clamps not tightening properly.

    Warning:

    Power connections must be performed by a licensed electrician only.

11. Verify that the power cable connections are correct.

12. Screw the retaining nut onto the AC power cord to secure it to the metal wiring compartment.

13. Using a number 2 Phillips (+) screwdriver, tighten the four captive screws on the metal AC wiring compartment.

14. Use the provided plastic cable tie to fasten the AC power cord to the PDM.

15. Verify that the AC power cord does not touch or block access to router components, and that it does not drape where people could trip on it.

16. Repeat the procedure for the other three-phase delta AC PDMs.

17. Connect the three-phase delta AC power cord mating connector to the AC power cord connector.

    Figure 19: Three-Phase Delta AC Power Cord Mating Connector

    Table 4: Three-Phase Delta AC Power Cord Mating Cable Connector Specifications

    Cable	Manufacturer Part Number	Description
    Three-phase delta	460C9W	60-amp, 250 volt 3-phase, 3-pole, 4-wire, North American pin and sleeve connector, industrial grade, IP67, watertight (blue)

    Warning:

    Do not touch the power connectors on the PDM. They can contain dangerous voltages.