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Maintaining the EX4200 Power System

 

Removing a Power Supply from an EX4200 Switch

The power supply in an EX4200 switch is a hot-removable and hot-insertable field-replaceable unit (FRU) located on the rear panel of the switch: You can remove and replace it without powering off the switch or disrupting switch functions.

Ensure that you have the following parts and tools available:

  • Phillips (+) screwdriver, number 2

  • An antistatic bag or an antistatic mat

Caution

Do not leave the power supply slot empty for a long time while the switch is on. The power supply must remain in the chassis for proper airflow.

To remove a power supply from the switch (see Figure 1):

  1. Place the antistatic bag or the antistatic mat on a flat, stable surface.
  2. Disconnect power to the switch by performing one of the following:
    • AC power supply—If the AC power source outlet has a power switch, set it to the OFF (0) position. If the AC power source outlet does not have a power switch, gently pull out the male end of the power cord connected to the power source outlet.

    • DC power supply—Switch the circuit breaker on the panel board that services the DC circuit to the OFF position.

  3. Remove the power source cable from the power supply faceplate:
    • AC power supply—Gently pull out the female end of the power cord connected to the power supply faceplate.

    • DC power supply—Remove the screws securing the ring lugs attached to the power source cables to the power supply using the screwdriver, and remove the power source cables from the power supply. Replace the screws on the terminals and tighten them.

  4. Loosen the locking lever screw on the left front of the power supply by using the screwdriver.
  5. Push down on the locking lever until it is in its lowest position.
  6. Grasp the power supply handle and pull firmly to slide it halfway out of the chassis.
  7. Place one hand under the power supply to support it and slide it completely out of the chassis. Take care not to touch power supply components, pins, leads, or solder connections.
  8. Place the power supply in the antistatic bag or on the antistatic mat placed on a flat, stable surface.
Figure 1: Removing a Power Supply from the Switch
Removing a Power Supply from the Switch

Installing a Power Supply in an EX4200 Switch

The power supply in EX4200 switches is a hot-removable and hot-insertable field-replaceable unit (FRU): You can remove and replace it without powering off the switch or disrupting switch functions.

All the EX4200 AC powered or DC powered switches, except the EX4200-24F-S and EX4200-48T-S switches are shipped with one AC or DC power supply pre-installed in the rear panel of the switches. EX4200-24F-S and EX4200-48T-S switches are not shipped with pre-installed power supplies; you must order them separately.

Ensure that you have the following parts and tools available:

  • A Phillips (+) screwdriver, number 2

To install a power supply in the switch (see Figure 2):

  1. Taking care not to touch power supply components, pins, leads, or solder connections, remove the power supply from its bag.
  2. Loosen the locking lever screw on the left front of the power supply by using the screwdriver.
  3. Push down on the locking lever until it is in its lowest position.
  4. Using both hands, place the power supply in the power supply slot on the rear panel of the switch and slide it in until it is fully seated.Note

    The handle on the 320 W AC power supply is at the bottom of the power supply faceplate, while the handle on the 600 W and the 930 W AC power supplies is at the top of the faceplate. The handle on the 190 W DC power supply runs across the faceplate.

  5. Push the locking lever up to its highest position (this action might pull the power supply in).
  6. Tighten the locking lever screw by using the screwdriver.
Figure 2: Installing a Power Supply in an EX4200 Switch
Installing a Power Supply in an EX4200 Switch
Note

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

Note

EX4200-24PX and EX4200-48PX switches do not support the 930 W (EX-PWR-930-AC) or the 600 W (EX-PWR-600-AC) AC power supplies that are used in the EX4200-48P and the EX4200-24P switch models. EX4200-24PX and EX4200-48PX switches work only with the power supply labeled EX-PWR2-930-AC. You can find the label on the top of the power supply (see Removing a Power Supply from an EX4200 Switch). The EX-PWR2-930-AC power supply is supported across the EX4200 product line.

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.