Help us improve your experience.

Let us know what you think.

Do you have time for a two-minute survey?

 
ON THIS PAGE
 

Maintaining the EX9214 Power System

Removing an AC Power Supply from an EX9214 Switch

Before you remove an AC power supply from the switch:

Ensure that you have the following parts and tools available to remove an AC power supply from an EX9214 switch chassis:

  • ESD grounding strap

  • Phillips (+) screwdrivers, number 1 and 2

  • Replacement power supply or a cover panel for the power supply slot

The AC power supply in an EX9214 switch is a hot-removable and hot-insertable field-replaceable unit (FRU) installed in the rear panel.

CAUTION:

Before you remove a power supply, ensure that you have power supplies sufficient to power the switch that remains in the chassis. See Power Requirements for EX9200 Switch Components.

CAUTION:

Do not leave the power supply slot empty for a long time while the switch is operational. Either replace the power supply unit promptly or install a cover panel over the empty slot.

Note:

After powering off a power supply, wait for at least 60 seconds before turning it back on.

CAUTION:

Do not leave the power supply slot empty for a long time while the switch is operational. Either replace the power supply promptly or install a cover panel over the empty slot.

To remove an AC power supply from an EX9214 switch (see Figure 1):

  1. Switch off the dedicated customer site circuit breaker for the power supply and remove the power cord from the AC power source. Follow the instructions for your site.
  2. Attach the ESD grounding strap to your bare wrist, and connect the strap to the ESD point on the chassis.
  3. If you are using the power supply in one-feed mode, move the AC input switch located on the chassis above the power supply to the Off (O) position. If you are using the power supply in two-feed mode, set the power switch on the power supply faceplate also to the Off (O) position.
  4. If you are using the power supply in one-feed mode, remove the coupler end of the power cord from the AC appliance inlet located on the chassis above the power supply. This is the recommended inlet when using the power supply in one-feed mode. If you are using the power supply in two-feed mode, remove the coupler end of the other power cord from the AC appliance inlet on the power supply faceplate also.
  5. While grasping the handle on the power supply faceplate with one hand, use the other hand to pull the spring-loaded locking pin in the release lever away from the chassis and turn the release lever in the counterclockwise direction until it stops. See Figure 1.
    Figure 1: Removing an AC Power Supply from an EX9214 SwitchRemoving an AC Power Supply from an EX9214 Switch
  6. Let go of the locking pin in the release lever. Ensure that it is seated in the corresponding hole in the chassis.
    Warning:

    Do not touch the connector on the top of the power supply.

  7. Gently pull the power supply out of the chassis.

Installing an AC Power Supply in an EX9214 Switch

Before you install an AC power supply in the switch:

Ensure that you have the following parts and tools available:

  • ESD grounding strap

  • Phillips (+) screwdriver, number 1

The AC power supply in an EX9214 switch is a hot-insertable and hot-removable field-replaceable unit (FRU) installed in the rear panel. Up to four AC power supplies can be installed in an EX9214 switch.

Note:

Each AC power supply must be connected to a dedicated AC power source outlet and a dedicated customer site circuit breaker.

To install an AC power supply in an EX9214 switch:

  1. Attach the ESD grounding strap to your bare wrist, and connect the strap to the ESD point on the chassis.
  2. If the power supply slot has a cover panel on it, unscrew the screw on the side of the cover panel in the counterclockwise direction using the Phillips (+) screwdriver, number 1, and remove the cover panel. Save the cover panel for later use.
  3. Taking care not to touch power supply components, pins, leads, or solder connections, remove the power supply from its bag.
  4. Flip the AC input switch next to the appliance inlet on the power supply faceplate to the Off (O) position.
  5. Check whether the release lever below the empty power supply slot is locked in the counterclockwise direction (see Figure 2). If it is not, pull the spring-loaded locking pin in the release lever away from the chassis and turn the release lever in the counterclockwise direction until it stops, and then let go of the locking pin in the release lever, and ensure that it is seated in the corresponding hole in the chassis.
  6. Using both hands, slide the power supply straight into the chassis until the power supply is fully seated in the slot on the rear of the switch. The small tab on the metal housing that is controlled by the release lever must be inside of the corresponding slot at the bottom of the power supply (see Figure 2). Ensure that the power supply faceplate is flush with any adjacent power supply faceplates or power supply cover panels.
    Figure 2: Installing an AC Power Supply in an EX9214 SwitchInstalling an AC Power Supply in an EX9214 Switch
  7. While firmly pushing the handle of the power supply with one hand, use the other hand to pull the spring-loaded locking pin in the release lever away from the chassis and turn the release lever in the clockwise direction until it stops.
  8. Let go of the locking pin in the release lever. Ensure that it is seated in the corresponding hole in the chassis.
Note:

If you have a Juniper J-Care service contract, register any addition, change, or upgrade of hardware components at https://www.juniper.net/customers/support/tools/updateinstallbase/ . Failure to do so can result in significant delays if you need replacement parts. This note does not apply if you replace existing components with the same type of component.

To connect power to an AC power supply, see Connecting AC Power to an EX9214 Switch.

See Also

Removing a DC Power Supply from an EX9214 Switch

Before you remove a DC power supply from the switch:

Ensure that you have the following parts and tools available to remove a DC power supply from an EX9214 switch chassis:

  • ESD grounding strap

  • Phillips (+) screwdrivers, number 1 and 2

  • 3/8 in. (9.5 mm) nut driver or socket wrench

  • Replacement power supply or cover panel for the power supply slot

The DC power supply in an EX9214 switch is a hot-removable and hot-insertable field-replaceable unit (FRU). You remove DC power supplies from the front of the chassis.

CAUTION:

Before you remove a power supply, ensure that you have power supplies sufficient to power the switch that remains in the chassis. See Power Requirements for EX9200 Switch Components.

Note:

After powering off a power supply, wait for at least 60 seconds before turning it back on.

Warning:

Before performing DC power procedures, ensure that power is removed from the DC circuit. To ensure that all power is off, locate the circuit breaker on the panel board that services the DC circuit, switch the circuit breaker to the OFF position and tape the switch handle of the circuit breaker in the OFF position.

To remove a DC power supply from an EX9214 switch:

  1. Switch off the dedicated customer site circuit breaker for the power supply being removed. Follow your site's procedures for ESD.
  2. Make sure that the voltage across the DC power source cable leads is 0 V and that there is no chance that the cables might become active during the removal process.
  3. Attach the ESD grounding strap to your bare wrist, and connect the strap to the ESD point on the chassis.
  4. Move the DC circuit breaker on the DC power supply faceplate to the Off (O) position.
  5. Remove the clear plastic cover protecting the terminal studs on the faceplate.
  6. Remove the nut and washer from each of the terminal studs. (Use a 7/16 in. [11 mm] nut driver or socket wrench.)
  7. Remove the cable lugs from the terminal studs.
  8. Loosen the captive screws on the bottom edge of the power supply faceplate using a screwdriver.
  9. Carefully move the power cables out of the way.
  10. While grasping the handle on the power supply faceplate with one hand, use the other hand to pull the spring-loaded locking pin in the release lever away from the chassis and turn the release lever in the counterclockwise direction until it stops. See Figure 3.
    Figure 3: Removing a DC Power Supply from an EX9214 SwitchRemoving a DC Power Supply from an EX9214 Switch
  11. Let go of the locking pin in the release lever. Ensure that it is seated in the corresponding hole in the chassis.
    Warning:

    Do not touch the connector on the top of the power supply.

  12. Pull the power supply straight out of the chassis.

Installing a DC Power Supply in an EX9214 Switch

Before you install a DC power supply in the switch:

  • Ensure you understand how to prevent Electrostatic discharge (ESD) damage. See Prevention of Electrostatic Discharge Damage.

  • Ensure that the voltage across the DC power source cable leads is 0 V and that there is no chance that the cable leads might become active during installation.

Ensure that you have the following parts and tools available:

  • ESD grounding strap

  • Phillips (+) screwdriver, number 1

The DC power supply in an EX9214 switch is a hot-insertable and hot-removable field-replaceable unit (FRU) installed in the rear panel. Up to four DC power supplies can be installed in an EX9214 switch.

To install a DC power supply in an EX9214 switch:

  1. Attach the ESD grounding strap to your bare wrist, and connect the strap to the ESD point on the chassis.
  2. If the power supply slot has a cover panel on it, unscrew the screw on the side of the cover panel in the counterclockwise direction using the Phillips (+) screwdriver, number 1, and remove the cover panel. Save the cover panel for later use.
  3. Taking care not to touch power supply components, pins, leads, or solder connections, remove the power supply from its bag.
  4. Move the DC circuit breaker on the power supply faceplate to the Off (O) position.
  5. Check whether the release lever below the empty power supply slot is locked in the counterclockwise direction (see Figure 4). If it is not, pull the spring-loaded locking pin in the release lever away from the chassis and turn the release lever in the counterclockwise direction until it stops, and then let go of the locking pin in the release lever, and ensure that it is seated in the corresponding hole in the chassis.
  6. Using both hands, slide the power supply straight into the chassis until the power supply is fully seated in the slot on the rear of the switch. The small tab on the metal housing that is controlled by the release lever must be inside of the corresponding slot at the bottom of the power supply (see Figure 4). Ensure that the power supply faceplate is flush with any adjacent power supply faceplates or power supply cover panels.
    Figure 4: Installing a DC Power Supply in an EX9214 SwitchInstalling a DC Power Supply in an EX9214 Switch
  7. While firmly pushing the handle of the power supply with one hand, use the other hand to pull the spring-loaded locking pin in the release lever away from the chassis and turn the release lever in the clockwise direction until it stops.
  8. Let go of the locking pin in the release lever. Ensure that it is seated in the corresponding hole in the chassis.
Note:

If you have a Juniper J-Care service contract, register any addition, change, or upgrade of hardware components at https://www.juniper.net/customers/support/tools/updateinstallbase/ . Failure to do so can result in significant delays if you need replacement parts. This note does not apply if you replace existing components with the same type of component.

To connect power to a DC power supply, see Connecting DC Power to an EX9214 Switch.

See Also

Maintaining Power Supplies in EX9200 Switches

Purpose

For optimum switch performance, verify the condition of the installed power supplies.

Action

On a regular basis:

  • Check the status of the power supplies by issuing the show chassis environment pem command. The output for EX9200 switches is similar to the following:

  • Make sure that the power and grounding cables are arranged so that they do not obstruct access to other switch components.

  • Routinely check the status LEDs on the power supply faceplates and the craft interface in EX9200 switches to determine whether the power supplies are functioning normally.

  • Check the alarm LEDs on the craft interface in EX9200 switches. Power supply failure or removal triggers an alarm that causes one or both of the LEDs to light. You can display the associated error messages by issuing the following command:

  • Periodically inspect the site to ensure that the grounding and power cables connected to the switch are securely in place and that there is no moisture accumulating near the switch.