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Connect the MX301 to Power

Connect the MX301 to power by performing the following steps. Take safety precautions to prevent equipment damage and personal injury

Ground the MX301

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 an earth ground to 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.

Note:

You must install the router in a restricted-access location and ensure that the chassis is always properly grounded. The router has a two-hole protective grounding 73 terminal on the rear panel. Under all circumstances, use this grounding connection to ground the chassis. For AC and HVAC/HVDC-powered systems, you must also use the grounding wire in the power cord along with the two-hole protective grounding lug connection. This tested system meets or exceeds all applicable EMC regulatory requirements with the two-hole protective grounding terminal.

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

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

  • Terminal lug (provided)—Panduit LCD6-14AF-L terminal lug or an equivalent lug are sized for 6 AWG (4.11 mm²) power source cables. The 2-hole terminal lug connects to the grounding point located at the rear panel of the MX301.

  • Grounding cable for your device (not provided)—The grounding cable must be 6 AWG (4.11 mm²) stranded wire and rated 90 °C or according to local electrical code.

  • A Phillips (+) screwdriver, number 2 to tighten the screw (not provided).

You must install heat-shrink tubing insulation around the crimped section of the power source cables and lugs.

Under all circumstances, use the chassis grounding point to ground the chassis to earth ground.

To ground the MX301:

  1. Wrap and fasten one end of the ESD grounding strap around your wrist. Connect the other end to the ESD point on the chassis.
    Figure 1: Chassis ESD Point Chassis ESD Point
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    ESD point
  2. Ensure that all grounding surfaces are clean and brought to a bright finish before making the grounding connections.
  3. Connect the grounding cable to a proper earth ground, such as the rack in which you mount the device.
  4. Using the Phillips screwdriver, remove the screws from the chassis grounding point.
    Figure 2: Grounding Point on the MX301 Grounding Point on the MX301
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    Grounding point
  5. 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 3: Connect the Terminal Lugs to the MX301 Connect the Terminal Lugs to the MX301
  6. 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.

Install Heat-Shrink Tubing on a Power Cable

To install heat-shrink tubing insulation around the power cables:
  1. Slide the tubing over the portion of the cable where it is attached to the lug barrel. Ensure that tubing covers the end of the wire and the barrel of the lug attached to it.
  2. Shrink the tubing with a heat gun. Ensure that you heat all sides of the tubing evenly so that it shrinks around the cable tightly.
    CAUTION:

    Do not overheat the tubing.
    Figure 4: Install Heat-Shrink Tubing Install Heat-Shrink Tubing

Connect AC Power to the MX301

Power supply units (PSUs) in the MX301 are hot-removable and hot-insertable field-replaceable units (FRUs) with support for 1+1 redundancy. You can remove and replace a redundant PSU without powering off the MX301 or disrupting the device functions.

CAUTION:

Do not mix AC, DC, and HVAC/DC power supplies in the same chassis.

Before you begin to connect AC power to the device:

Connect the JPSU-850W-AC-AFO to Power

This topic guides you through the steps to connect the JPSU-850W-AC-AFO AC PSU to power.

To connect the JPSU-850W-AC-AFO to power:

  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. Lift the power cord retainer on the PSU. See Figure 5.
  3. Locate the AC power cords shipped with the MX301. The cords have plugs appropriate for your geographical location. See JPSU-850W-AC-AFO.
  4. Insert the coupler end of the power cord into the power inlet of the AC PSU.
  5. Pull down the power cord retainer onto the power cord.
    Figure 5: Connect power cord to the MX301 AC PSU Connect power cord to the MX301 AC PSU
  6. If the AC power source outlet has a power switch, set it to the off (O) position.
  7. 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 circuit breaker rated at a minimum of 16 A (250 VAC), or as permitted by the local code.
  8. If the AC power source outlet has a power switch, set it to the on (|) position.

Connect DC Power to the MX301

Power supply units (PSUs) in the MX301 are hot-removable and hot-insertable field-replaceable units (FRUs) with support for 1+1 redundancy. You can remove and replace a redundant PSU without powering off the MX301 or disrupting the device functions.

CAUTION:

Do not mix AC, DC, and HVAC/DC power supplies in the same chassis.

Before you begin to connect DC power to the device:

You connect DC power to MX301 by attaching power cables from the external DC power sources to the terminal studs on the power supply faceplates. The power cables for the DC PSUs are rated at 14 AWG or as permitted by the local code.

Connect the JPSU-850W-DC-AFO to Power

This topic guides you through the steps to connect the JPSU-850W-DC-AFO DC PSU to power.

To connect the JPSU-850W-DC-AFO to power:

  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. Switch off the dedicated facility circuit breakers. Ensure that the voltage across the DC power source cable leads is 0 V. You must ensure that the cable leads do not become active during installation.
  3. Install heat-shrink tubing insulation around the power cables (see Install Heat-Shrink Tubing on a Power Cable).
  4. Remove the clear plastic cover that protects the terminal studs on the faceplate.
  5. Verify that you have correctly labeled the DC power cables before making connections to the PSU.

    In a typical power distribution scheme where the return (RTN) cable is connected to chassis ground in a battery plant, you can use a multimeter to verify the ohm output of the -48 V and return (RTN) DC cables to chassis ground. The cable with very large resistance (indicating an open circuit) to chassis ground will be -48 V. The cable with very low resistance (indicating a closed circuit) to chassis ground will be RTN.

    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 PSU.
  6. Remove the screws and square washers from the terminals using a Phillips (+) screwdriver, number 2. See Figure 6.
  7. Secure each power cable ring terminal to the terminals with the square washers and the screws. Apply between 23 in.-lb (2.6 Nm) and 25 in.-lb (2.8 Nm) of torque to each screw.
    Figure 6: Connect Power Cable Ring Terminal to the MX301 DC PSU Terminal Connect Power Cable Ring Terminal to the MX301 DC PSU Terminal

    • Secure each positive (+) DC source power cable lug to an RTN (return) terminal.

    • Secure each negative (–) DC source power cable lug to a -48 V (input) terminal.

    Note:

    Connect each power cable to a dedicated external circuit breaker. We recommend that you use a circuit breaker rated at 20 A through 25 A for 80 VDC, or as permitted by the local code.
  8. Replace the clear plastic cover over the terminal studs of the PSU faceplate.
  9. Verify that the power cables are connected correctly. The cables must not touch or block access to the router components, and they must not cause a tripping hazard.
  10. Switch the circuit breaker on the panel board that services the DC circuit to the ON (|) position.
  11. Connect the power cables to the external DC power source. If the external DC power source has a switch, set it to the ON (|) position.

Connect HVAC/DC Power to the MX301

Power supply units (PSUs) in the MX301 are hot-removable and hot-insertable field-replaceable units (FRUs) with support for 1+1 redundancy. You can remove and replace a redundant PSU without powering off the MX301 or disrupting the device functions. The HVAC/DC PSU will automatically detect whether there is HVAC or HVDC input voltage and manage the power accordingly.

CAUTION:

Do not mix AC, DC, and HVAC/DC power supplies in the same chassis.

Before you begin to connect HVAC or HVDC power to the device:

Connect the JPSU-850W-HV-AFO to Power

This topic guides you through the steps to connect the JPSU-850W-HV-AFO HVAC or HVDC PSU to power.

To connect the JPSU-850W-DC-AFO to HVAC or HVDC power:
  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. Power off the AC/DC power source outlet.
  3. Insert the HVAC/DC power cord firmly into the power inlet of the HVAC/DC PSU.
    Figure 7: Connect Power Cord to the MX301 HVAC/DC PSU Connect Power Cord to the MX301 HVAC/DC PSU
  4. Insert the power cord plug into the AC/DC power source outlet.
    Note:

    Each PSU must be connected to a dedicated HVAC/HVDC power feed and a dedicated external circuit breaker. We recommend that you use a circuit breaker rated at a minimum of 16 A (250 VAC), or as permitted by the local code.
  5. Route the power cord appropriately. Verify that the power cord does not block the air exhaust and access to router components, or drape where people could trip on it.
  6. If the power source outlet has a power switch, power it on.