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Fast Track to Rack Installation and Power

This procedure guides you through the simplest steps to install your MX301 Router in a rack and connect it to power. Have more complex installation needs? See Install the MX301.

Install the MX301 in a Rack

You can install the Juniper Networks® MX301 Router in a two-post rack, a four-post threaded-hole rack, or a four-post square-holed rack. We’ll walk you through the steps to install an AC-powered device in a four-post square-holed rack.

Before you install, review the following:

Ensure that you have the following tools and parts available:

  • An electrostatic discharge (ESD) grounding strap (provided)

  • A pair of front-mounting and rear-floating rails (provided with the RMK)

    These mounting rails attach to the front and rear rack posts.

  • A pair of chassis brackets (provided with the RMK)

    You must attach these brackets to the device if not preinstalled.

Note:

Juniper provides the four-post rack mounting kit (JNP301-4PST-RMK) with the MX301. If the four-post kit is lost or damaged, you can order a replacement.
  1. Wrap and fasten one end of the ESD cable grounding strap around your bare wrist. Connect the other end to a site ESD point.
  2. Install the chassis bracket to the chassis by aligning the keyholes on the chassis bracket with the shoulder screws on the chassis. Slide the chassis bracket toward the rear of the chassis.
    Figure 1: Install the Chassis Brackets Install the Chassis Brackets
  3. Assemble the mounting rails by sliding the rear-floating rails into the respective front-mounting rails.
    Figure 2: Assemble the Mounting Rails Assemble the Mounting Rails
  4. Install the mounting rails on the four-post rack:
    1. Use the guide pin to align the guide blocks of the rear-floating rails with the corresponding rear post holes. Pull the rear-floating rails toward the front of the rack to lock the rail in place. You will hear a distinct click sound when the latch locks into the corresponding rack holes.
      Figure 3: Secure Rear-Floating Rails Secure Rear-Floating Rails
    2. Align the guide blocks of the front-mounting rails with the front post holes. Push the front-mounting rails toward the rear of the rack to lock the rails in place. You will hear a distinct click sound when the latch locks into the corresponding rack holes.
      Figure 4: Secure Front-Mounting Rails Secure Front-Mounting Rails
      Figure 5: Both Mounting Rails Installed and Secured Both Mounting Rails Installed and Secured
    3. Visually confirm that you have locked the front and rear latches into the mounting rails. The mounting rails should now be securely installed on the rack.
  5. Lift the device and position it in the rack, aligning the chassis brackets with the mounting rails. Slide the device all the way into the channels of the rack mounting rails.
    Figure 6: Slide the MX301 into the Rack Slide the MX301 into the Rack
  6. Tighten the two thumbscrews (in a clockwise direction) to secure the device.
    Figure 7: Tighten the Thumbscrews Tighten the Thumbscrews

Connect to Power

To connect the MX301 Router to AC power, you must perform the following tasks:

Ground the MX301 Router

To meet safety and electromagnetic interference (EMI) requirements and to ensure proper operation, you must connect the MX301 to an earth ground before you connect it to power.

Note:

Before you connect the earth ground and the protective earthing terminal of the device, ensure that a licensed electrician attaches an appropriate grounding terminal to the grounding cable. Using a grounding cable with an incorrectly attached terminal can damage the device.

Before connecting the device to an earth ground, ensure that you have the following parts and tools:

  • An electrostatic discharge (ESD) grounding strap.

  • A grounding cable for your device—The grounding cable must be 6 AWG (4.11 mm²) stranded wire and rated 90 °C or according to the local electrical code.

  • A grounding 2-hole terminal lug for your grounding cable—The grounding terminal lug attaches to the chassis grounding point.

  • A Phillips (+) screwdriver, number 2 to tighten the screw.

To ground the MX301 Router:

  1. Ensure that all grounding surfaces are clean and brought to a bright finish before making the grounding connections.

  2. Connect the grounding cable to a proper earth ground, such as the rack in which you mount the device.

  3. Using the Phillips screwdriver, remove the screws from the chassis grounding point.

    Figure 8: Grounding Point on the MX301 Grounding Point on the MX301
      1
    —

    Grounding point

  4. Secure the terminal lug attached to the other end of the ground cable to the chassis grounding point. Use the screws that you removed from the chassis grounding point in the earlier step.

    Figure 9: Connect the Grounding Cable to the MX301 Connect the Grounding Cable to the MX301

  5. Verify that the grounding cable does not touch or block access to the device components. Make sure that the cable does not trail across the floor where people could trip over it.

    Note:

    Ensure that the device is permanently connected to ground during its operation.

Connect the Power Cord and Power On the MX301 Router

For information about the supported AC power cord specifications on your device, see MX301 Power System.

CAUTION:

Do not mix AC, DC, and HVAC/DC power supply units (PSUs) in the same chassis.

Before you begin to connect the device to AC power:

To connect the power cord and power on the device:

  1. Lift the power cord retainer on the AC PSU. See Figure 10.

  2. Locate the AC power cords shipped with the MX301. The cords have plugs appropriate for your geographical location.

  3. Insert the coupler end of the power cord into the power inlet of the AC PSU.

  4. Pull down the power cord retainer onto the power cord.

    Figure 10: Connect Power Cord to the MX301 AC PSU Connect Power Cord to the MX301 AC PSU

  5. If the AC power source outlet has a power switch, set it to the off (O) position.

  6. Insert the power cord plug into the AC power source outlet.

    Note:

    Connect each PSU to a dedicated AC power feed and a dedicated external circuit breaker. We recommend that you use a minimum of 16 A (250 VAC), or as permitted by the local code.

  7. If the AC power source outlet has a power switch, set it to the on (|) position.