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Connecting the QFX10008 or QFX10016 to Power

 

QFX10008 and QFX10016 switches support both AC and DC power supplies. Additionally, QFX modular chassis switches also support high voltage alternating current (HVAC) and high voltage direct current (HVDC) power supplies.

Note

Do not mix power supply models in the same chassis in a running environment. DC and HVDC can coexist in the same chassis during the hot swap of DC for HVDC.

Connect the QFX10008 or QFX10016 to Earth Ground

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

You must install the QFX10008 and QFX10016 in a restricted-access location and ensure that the chassis is always properly grounded. The QFX10008 and QFX10016 has a two-hole protective grounding terminal provided on the chassis. See Figure 3. 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. This tested system meets or exceeds all applicable EMC regulatory requirements with the two-hole protective grounding terminal.

Ensure that a licensed electrician has attached an appropriate grounding lug to the grounding cable you supply. Using a grounding cable with an incorrectly attached lug can damage the switch.

Note

Mount your switch in the rack before attaching the grounding lug to the switch. For the QFX10008, see Mounting a QFX10008 in a 4-Post Rack Using a Mechanical Lift or Manually Mounting a QFX10008 in a 4-Post Rack.

For the QFX10016, see Mounting a QFX10016 in a Four-Post Rack Using a Mechanical Lift.

Ensure that you have the following parts and tools available:

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

  • Protective earthing terminal lug (provided).

  • Grounding cable for your chassis (not provided)—The grounding cable must be 6 AWG (13.3 mm²), minimum 90° C wire, or as permitted by the local code.

  • Grounding lug for your grounding cable (provided)—This bracket attaches to the lower left corner of the chassis next to PSU 5 on the QFX10008 and PSU 9 on the QFX10016. The grounding lug required is a Panduit LCD6-10A-L or equivalent.

  • A Phillips screwdriver to tighten the two screws that are mounted on the chassis (not provided).

An AC-powered QFX modular chassis gains additional grounding when you plug the power supply in the switch into a grounded AC power outlet by using an AC power cord appropriate for your geographical location.

To connect earth ground to a QFX10008 or QFX10016 chassis:

  1. Verify that a licensed electrician has attached the cable lug (provided in the accessory kit) to the grounding cable.
  2. Connect the other end of the grounding cable to a proper earth ground, such as the rack in which the switch is mounted.
  3. Attach an ESD grounding strap to your bare wrist, and connect the strap to the ESD grounding point next to the earthing posts (see Figure 1 and Figure 2).
    Figure 1: ESD Point for the QFX10008
    ESD Point for the QFX10008
      1
    Grounding point
     
    Figure 2: ESD Point for the QFX10016
    ESD Point for the QFX10016
      1
    Grounding point
     
  4. Remove the two screws on the chassis using a Phillips screwdriver.
  5. Place the chassis grounding lug and cable over the PEM nuts with the cable connection pointing to the left. See Figure 3 and Figure 4.
    Figure 3: Connecting a Grounding Cable to the QFX10008
    Connecting a Grounding
Cable to the QFX10008
    Figure 4: Connecting a Grounding Cable to the QFX10016
    Connecting a Grounding
Cable to the QFX10016
  6. Place the two screws over the grounding lug and grounding cable.
  7. Tighten the two screws using a Phillips screwdriver.
  8. Dress the grounding cable and ensure that it does not touch or block access to other device components and that it does not drape where people can trip over it.

Connect AC Power to a QFX Modular Chassis

After you ground the chassis, add power supplies, and supply power to the chassis, the system initiates the power-on sequence. This sequence can start incrementally with a single power supply, but it is not recommended that you bring up a QFX system with less than three power supplies.

Before you begin to connect power to the switch, be sure you understand how to prevent ESD damage. See Prevention of Electrostatic Discharge Damage.

To connect AC power to a QFX modular chassis:

  1. Connect the chassis to earth ground (see Connect the QFX10008 or QFX10016 to Earth Ground).Caution

    To meet safety and electromagnetic interference (EMI) requirements and to ensure proper operation, a QFX modular chassis must be adequately grounded before it is connected to power.

    For installations that require a separate grounding conductor to the chassis, use the protective earthing terminal on the rear panel of the QFX10008 or QFX10016 to connect to the earth ground.

    A QFX modular chassis gets 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 QFX10000 Power Cables Specifications.

  2. Install power supplies in the switch and apply power. See How to Install a QFX10000-PWR-AC Power Supply and How to Install a JNP10K-PWR-AC2 Power Supply.

Connect DC Power to a QFX10008 or QFX10016

The overall process of bringing up a DC-powered chassis involves the proper cabling of the individual power supplies, adding the power supplies to the chassis, and supplying power. The power-on sequence can start incrementally with a single power supply, but it is not recommended that you bring up a QFX modular chassis system with less than three power supplies.

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

Before you begin to connect power to the switch be sure you understand how to prevent electrostatic discharge (ESD) damage. See Prevention of Electrostatic Discharge Damage.

To connect DC power to a QFX10000-PWR-DC power supply, see How to Install a QFX10000-PWR-DC Power Supply. To connect DC power to a JNP10K-PWR-DC2 power supply, see How to Install a JNP10K-PWR-DC2 Power Supply.

  1. Ensure the chassis is properly grounded. Caution

    To meet safety and electromagnetic interference (EMI) requirements and to ensure proper operation, a QFX modular chassis must be adequately grounded before it is connected to power.

  2. Connect DC power to each DC power supply, see How to Install a QFX10000-PWR-DC Power Supply.

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