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Connect the QFX5241-32OD Switch to Power

Ground the QFX5241-32OD Switch

You must connect the QFX5241-32OD switch to earth ground before you connect it to power. Grounding helps your switch meet safety and EMI requirements and ensures that the switch functions properly.

You must install the QFX5241-32OD switch in a restricted-access location and ensure that the chassis is always properly grounded. The QFX5241-32OD switch comes with a two-hole protective grounding terminal provided on the side of the chassis. See Figure 1. Under all circumstances, use this grounding connection to ground the chassis. For AC-powered systems, you must also use the grounding wire in the AC power cord along with the two-hole grounding lug connection. The system is tested to ensure that it meets or exceeds all applicable EMC regulatory requirements for the two-hole protective grounding terminal.

CAUTION:
Ensure that a licensed electrician has attached an appropriate grounding lug to the grounding cable that you supply. Using a grounding cable with an incorrectly attached lug can damage the device.
Note: Install your switch in the rack before attaching the grounding lug to the switch.

Ensure that you have the following parts and tools available:

  • A grounding cable (not provided)—6 AWG, minimum 90 °C wire, or as permitted by the local code.

  • A grounding lug (not provided)—Panduit LCD6-14A-L or equivalent grounding lug. The grounding lug attaches to the device chassis through the left-front mounting bracket, providing a protective earthing terminal for the device.

  • Two M6 screws, 6 mm length with star washers (not provided)

  • Phillips (+) screwdriver, number 2

  • ESD grounding strap (not provided)

To ground the QFX5241-32OD switch:

  1. Wrap and fasten one end of the electrostatic discharge (ESD) grounding strap around your bare wrist, and connect the other end to a site ESD point or to the ESD point on your device.
  2. Remove the two M6 screws with star washers from the earthing terminal on the sides of the chassis.
  3. Place the Panduit LCD6-14A-L or equivalent grounding lug attached to the grounding cable over the protective earthing terminal. Attach the lug through the left-mounting bracket to the chassis.
  4. Secure the grounding lug to the protective earthing terminal using the two M6 screws with star washers.
    Figure 1: Connect a Grounding Cable to the QFX5241-32OD Switch Connect a Grounding Cable to the QFX5241-32OD Switch
  5. Connect the remaining end of the grounding cable to a proper earth ground, such as the rack in which the switch is mounted.
  6. Dress the grounding cable to ensure safety.
    Note:

    • The grounding cable must not touch other device components or obstruct access to the device.

    • Arrange the cable such that it does not drape in areas where people could trip over it.

To gain additional grounding for the chassis of your QFX5241-32OD switch, connect the PSU in the switch into a grounded power outlet. Use a power cord appropriate for your geographical location.

Connect AC Power to QFX5241-32OD Switch

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.

  • Ensure that you have connected the switch chassis to earth ground. See Ground the QFX5241-32OD Switch

    CAUTION:

    Before you connect power to the switch, a licensed electrician must attach a cable lug to the grounding 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 QFX5241-32OD Switch. The switch gains additional grounding when you plug the PSU in the switch into a grounded power outlet by using the AC power cord appropriate for your geographical location.

  • Install the power supply units (PSUs) in the chassis. For instructions on installing the PSU in the QFX5241-32OD switch, see Install a Power Supply Unit in QFX5241-32OD Switch.

The QFX5241-32OD switch ships from the factory with two preinstalled AC PSUs. The PSUs offer 1+1 redundancy for the AC input voltage range of 200 V through 240 V (up to 2400 W). However, for the AC input voltage range of 100 V through 127 V (up to 1000 W), there is no redundancy support. The PSUs are hot-removable and hot-insertable field-replaceable units (FRUs). You can replace a PSU in the slots adjacent to the fan modules without powering off the switch or disrupting its operation.

Note: QFX5241-32OD AC switch operates only in nonredundant mode when the AC input voltage range is 100–127 V. Any PSU or input power failure causes a system failure in nonredundant mode. Maintain a minimum system input above 200 V for full-load operation in redundant mode.
Note:

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

To connect AC power to the QFX5241-32OD switch:

  1. Wrap and fasten one end of the ESD grounding strap around your bare wrist, and connect the other end to a site ESD point.
  2. Ensure that the PSUs 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 Specifications.

    For each PSU:

    1. Connect the AC power cord. Insert the power cord coupler firmly into the AC inlet on the PSU faceplate.
      Figure 2: Connect the AC Power Cord Connect the AC Power Cord
    2. Connect a dedicated customer-site two-pole circuit breaker for each PSU. We recommend that you use a dedicated customer-site circuit breaker rated for 20 A (250 V), or as required by local code.
  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 you provide power to the PSU. The device does not have a power switch.
  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 status LEDs on each PSU are lit green.

    If the status LED is lit amber, disconnect the power cords from the PSU and replace the PSU. See Maintain the QFX5241-32OD Power System.

    Remove the PSU from the switch only when you have a replacement PSU ready. Install the PSUs in the switch to ensure proper airflow.