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Connecting the RPS to Power

 

Connecting Power to an EX Series Redundant Power System Power Supply

Power is supplied to an RPS by the installed EX-PWR3-930-AC power supplies—the RPS itself does not have a power connector. After you install a power supply in the Redundant Power System (RPS), connect AC power to the power supply.

Note

Each power supply in the RPS must be connected to its own dedicated power source outlet.

Before you begin connecting AC power to the RPS:

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

    Caution

    Before you connect power to the power supply, 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 RPS (for example, by causing a short circuit).

    Caution

    To meet safety and electromagnetic interference (EMI) requirements and to ensure proper operation, you must connect the RPS to an earth ground before you connect it to power. For installations that require a separate grounding conductor to the RPS chassis, use the protective earthing terminal on the chassis to connect to the earth ground. The RPS gets additional grounding when you plug a power supply in the RPS into a grounded AC power outlet by using the AC power cord appropriate for your geographical location (see Power Specifications for the EX Series Redundant Power System).

Ensure that you have the following parts and tools available to connect AC power to the RPS:

  • Power cord appropriate for your geographical location

To connect AC power to the power supply installed in the RPS:

  1. Ensure that the power supply is properly inserted in the chassis and the screws on its faceplate are tightened.
  2. Squeeze the two sides of the power cord retainer clip, and insert the L-shaped ends of the wire clip into the holes in the bracket on each side of the AC appliance inlet on the power supply faceplate (see Figure 1).
  3. Locate the power cord shipped with the power supply. Warning

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

  4. Insert the coupler end of the power cord into the AC appliance inlet on the power supply faceplate (see Figure 1).
    Figure 1: Each Power Supply Must Be Plugged In
    Each Power Supply Must Be
Plugged In
  5. Push the cord into the connector in the adjustment nut of the power cord retainer. Turn the nut until it is tight against the base of the coupler and the connector in the nut is turned 90° from the top of the RPS (see Figure 1).
  6. If the AC power source outlet has a power switch, set it to the OFF (0) position.
  7. Plug the power cord into an AC power source outlet.
  8. If the AC power source outlet has a power switch, set it to the ON (|) position.
  9. Verify that the AC OK LED on the power supply is lit and is on steadily.
  10. Repeat these steps for each power supply installed in the RPS.

As soon as power is connected to the middle power supply, the RPS is powered on. Install up to two additional power supplies with the RPS powered on—the power supplies are hot-insertable.

Connecting the EX Series Redundant Power System to an EX2200 or EX3300 Switch

The Redundant Power System (RPS) can be connected to up to six EX2200 switches (supported models) or any EX3300 switches. One RPS can be used for any combination of supported switches, including one Virtual Chassis.

Before you connect an RPS to a switch:

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

  • Ensure that the middle power supply is fully inserted in the RPS and the screws on its faceplate are tightened.

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

    Caution

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

  • Ensure that the RPS is powered on.

    Note

    If you connect an RPS to a switch that is already booted, the RPS might take up to two minutes to come up after you power it on.

Ensure you have the following parts and tools available to connect the RPS to the switch:

  • One RPS cable for each switch (one is supplied—order additional cables separately)

    Figure 2: RPS Cable
    RPS Cable
  • Phillips (+) screwdriver, number 2 (not supplied)

Each switch has a default priority of 1 assigned to it when you connect it to the RPS. Those priority values determine which switches receive power from the RPS first. When all switches have the same priority (as they do by default), then priority is next determined by connector position, with the rightmost connector having the highest priority and the leftmost connector having the lowest priority. Position your switches accordingly. (You can also reconfigure switch priority from the switches themselves—see Determining and Setting Priority for Switches Connected to an EX Series RPS.)

To connect the RPS to the switch:

  1. Each EX2200 switch and EX3300 switch has a built-in connector for the RPS on the rear panel. If the RPS port of the switch is covered with a cover panel, remove the cover panel and save it for later use.
  2. Connect the cable to the switch. Gently insert one end of the RPS cable into the RPS port on the rear panel of the switch—see Figure 3.
    Figure 3: Connect the RPS Cable to the Switch
    Connect the RPS Cable to the
Switch
  3. The RPS ships with cover panels on each of the six ports—select any one of the ports and remove the cover panel, saving it for later use.
  4. Connect the cable to the uncovered RPS port—see Figure 3. As soon as the connection between the RPS and the switch is complete, the software starts configuring the connection.Warning

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

  5. After a minute, verify that the status LED corresponding to the switch connector is lit.
  6. Repeat these steps for each supported switch (six maximum) you connect to the RPS.
Note

Before the RPS can back up a connected switch, the switch’s RPS status must be ARMED. There are two ways to determine whether a switch’s RPS status is ARMED—either check the corresponding port LED on the RPS (lit and on steady) or issue this operational mode command from the switch CLI: show chassis redundant-power-system.