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Connecting the QFX5130-32CD to Power

How to Connect AC Power to a QFX5130-32CD

Ensure that you have a power cord appropriate for your geographical location available to connect AC power to the switch.

Before you begin connecting AC power to the switch:

  • Ensure that you have taken the necessary precautions to prevent electrostatic discharge (ESD) damage (see Prevention of Electrostatic Discharge Damage).

  • Ensure that you have connected the switch chassis to earth ground.

    CAUTION:

    Before you connect power to the switch, a licensed electrician must attach a cable lug to the grounding and power cables that you supply. A cable with an incorrectly attached lug can damage the switch (for example, by causing a short circuit).

    To meet safety and electromagnetic interference (EMI) requirements and to ensure proper operation, you must connect the chassis to earth ground before you connect it to power. For installations that require a separate grounding conductor to the chassis, use the protective earthing terminal on the switch chassis to connect to the earth ground. For instructions on connecting earth ground, see Ground the QFX5130-32CD and Connect Power. The switch gains additional grounding when you plug the power supply in the switch into a grounded AC power outlet by using the AC power cord appropriate for your geographical location. See AC Power Cord with Type C15 Coupler Specifications.

  • Install the power supplies in the chassis. For instructions on installing a power supply in a QFX5130-32CD, see How to Install an AC Power Supply in a QFX5130-32CD.

The QFX5130-32CD ships from the factory with two power supplies. Each power supply is a hot-removable and hot-insertable field-replaceable unit (FRU). You can install a replacement power supply in the slots next to the fan modules without powering off the switch or disrupting the switching function.

Note:

Each power supply must be connected to a dedicated power source outlet.

To connect AC power to a QFX5130-32CD:

  1. Attach the grounding strap to your bare wrist and to a site ESD point.
  2. Ensure that the power supplies are fully inserted in the chassis and the latches are secure. .
  3. Locate the power cords shipped with the switch; the cords have plugs appropriate for your geographical location. See AC Power Cord with Type C15 Coupler Specifications .

    For each power supply:

    1. Ensure the loop on the power cord retainer is open and there is enough space to insert the power cord coupler into the inlet. If the loop is closed, press the small tab on the retainer to loosen the loop. See Figure 1.
      Figure 1: Attaching the Power Cord RetainerAttaching the Power Cord Retainer
    2. Thread the power cord coupler through the power cord retainer loop.
    3. Insert the power cord coupler firmly into the AC inlet on the power supply faceplate.
    4. Slide the power cord retainer loop towards the power supply until it is snug against the base of the coupler.
    5. Press the tab on the loop and draw out the loop to enclose the power cord. See Figure 1.
    Warning:

    Ensure that the power cord does not block access to device components or drape where people can trip on it.

  4. If the AC power source outlet has a power switch, set it to the OFF (O) position.
    Note:

    The switch powers on as soon as power is provided to the power supply. There is no power switch on the device.

  5. Insert the power cord plug into an AC power source outlet.
  6. If the AC power source outlet has a power switch, set it to the ON (|) position.
  7. Verify that the AC and DC LEDs on each power supply are lit green.

    If the amber fault LED is lit, remove power from the power supply, and replace the power supply (Maintaining the QFX5130-32CD Power System). Do not remove the power supply until you have a replacement power supply ready: the power supplies must be installed in the switch to ensure proper airflow.

How to Connect DC Power to a QFX5130-32CD

Before You Begin

Before you begin connecting DC power to the switch:

  • Ensure that you have taken the necessary precautions to prevent electrostatic discharge (ESD) damage (see Prevention of Electrostatic Discharge Damage).

  • Ensure you have connected the switch chassis to earth ground (see Ground the QFX5130-32CD and Connect Power).

    CAUTION:

    Before you connect power to the switch, a licensed electrician must attach a cable lug to the ground and power cables that you supply (for example, by causing a short circuit).

    To meet safety and electromagnetic interference (EMI) requirements and to ensure proper operation, you must connect the chassis to earth ground before you connect it to power. For installations that require a separate grounding conductor to the chassis, use the protective earthing terminal on the switch chassis to connect to the earth ground.

  • Install the power supply in the chassis. For instructions on Installing a power supply in a QFX5130-32CD, see How to Install an AC Power Supply in a QFX5130-32CD.

    Warning:

    A DC-powered QFX5130-32CD is intended for installation only in a restricted access location.

Ensure that you have the following parts and tools available:

  • A spare JPSU-1600W-1UDCAFI or JPSU-1600W-1UDCAFO for QFX5130-32CD (not provided)

  • Phillips (+) screwdriver, number 2 (not provided)

  • Multimeter (not provided)

Warning:

Connecting DC Power to a QFX5130-32CD

To connect DC power to the DC model QFX5130-32CD:

  1. Attach the grounding strap to your bare wrist and to a site ESD point on the switch.
  2. Verify that the DC power cables are correctly labeled before making connections to the power supply. In a typical power distribution scheme where the return is connected to chassis ground at the battery plant, you can use a multimeter to verify the resistance of the –48V and RTN DC cables to chassis ground:
    • The cable with very low resistance (indicating a closed circuit) to chassis ground is positive (+) and will be installed on the V+ (return) DC power input terminal.

    • The cable with very high resistance (indicating an open circuit) to chassis ground is negative (–) and will be installed on the V– (input) DC power input terminal.

    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 DC power input terminals on each power supply.

  3. Ensure that the input circuit breaker is open so that the voltage across the DC power source cable leads is 0 V and that the cable leads do not become active while you are connecting DC power. The QFX5130-32CD should connect the power supplies to an external DC power source, or an -0% to +20% tolerance DC mains, supplied with a NRTL-approved circuit breaker rated at 40-A.
    Note:

    The V+ terminals are referred to as +RTN, and V– terminals are referred to as –48 V in DC Power Wiring Sequence Warning and DC Power Electrical Safety Guidelines.

  4. Ensure that the power supplies are fully inserted in the chassis.
  5. Remove the terminal block cover. The terminal block cover is a piece of clear plastic that snaps into place over the terminal block (see Figure 2).
    Figure 2: Removing Terminal Block CoverRemoving Terminal Block Cover
  6. Remove the screws on the terminals using the screwdriver. Save the screws. See Figure 3.
    Figure 3: QFX5130-32CD FaceplateQFX5130-32CD Faceplate
      1

    Not used

      4

    Release latch

      2

    Handle

      5

    V– terminal

      3

    LEDs

      6

    V+ terminal

  7. Connect each power supply to the power sources. Secure power source cables to the power supplies by screwing the ring lugs attached to the cables to the appropriate terminals by using the screw from the terminals (see Figure 4).
    Figure 4: Securing Ring Lugs to the Terminals on the QFX5130-32CD DC Power SupplySecuring Ring Lugs to the Terminals on the QFX5130-32CD DC Power Supply

    The QFX5130-32CD is designed to operate with a DC power supply that has a single, non-redundant, feed input. For source redundancy, two DC power supplies must be installed in the QFX5130; connect source (A) to one power supply and connect source (B) to the second power supply. This configuration provides the commonly deployed A/B feed redundancy for the system.

    CAUTION:

    The connection between each power source and power supply must include a circuit breaker.

    Do not connect two sources to a single power supply because doing so can potentially cause circulating current in feed wires whenever there is any difference in the voltage of the two sources.

    1. Secure the ring lug of the positive (+) DC power source cable to the V+ terminal on the DC power supply.
    2. Secure the ring lug of the negative (–) DC power source cable to the V– terminal on the DC power supply.
    3. Tighten the screws on the power supply terminals until snug using the screwdriver. Do not overtighten—apply between 5 in-lb (0.56 Nm) and 6 in-lb (0.68 Nm) of torque to the screws.
    Warning:

    Ensure that the power cables do not block access to device components or drape where people can trip on them.

  8. Replace the terminal block cover.
  9. Close the input circuit breaker.
    Note:

    The switch powers on as soon as power is provided to the power supply. There is no power switch on the device.

  10. Verify that the IN and OUT LEDs on the power supply are lit green and are on steadily.